Author: Andy Lee

General Tips on LongMill Troubleshooting

Posted on by

Hey everyone, it’s Andy here. Over the past few years, we’ve welcomed many thousands of CNC users into our community. Of course, with any electro-mechanical machine, some degree of troubleshooting is to be expected.

For the first year and a half since the launch of the LongMill, I had taken on the large majority of troubleshooting from customers directly through email. This was an excellent experience for me as it opened my eyes to observe almost all of the issues that were possible, as well as giving me the chance to learn and communicate with customers better. Even to this day, I am regularly checking on customer tickets and working with our support team to tackle new or more complicated support issues, although it’s typically no longer my day-to-day role.

What has been interesting to see over this period of time has been not just how we collect data and information about issues over time, but also our understanding of the human nature of users when it comes to identifying and troubleshooting issues.

One of the things we’ve come to recognize is that there are a number of misconceptions to address in terms of troubleshooting the LongMill. This article covers some of my personal recommendations for helping you troubleshoot issues on your LongMill.

Our custom dashboard tracking what types of tickets we receive and the frequency of certain issues

Tip 1: Listen and look at your machine carefully

Simply listening and looking at what your machine is doing can help a lot in identifying problems. Is the machine making a weird sound? Do you hear the motors stalling? Is the machine stopping and starting irregularly? Is there a component that is slipping? Making a close observation can help identify the cause of an issue.

It’s important to note that the large majority of issues for the LongMill are mechanical. This means that for most issues, you can physically, hear, or feel issues. A few extra tips for this tip:

  • Jog your machine manually on each axis and check for smooth motion. I recommend running at the highest speed for each axis as stalling is more likely at higher speeds
  • Run your project in the air. Look for any irregularities and odd behavior.
  • Try turning lead screws and moving your gantries by hand. This can help identify looseness or binding.

Tip 2: Most issues are simple issues

The large majority of issues are caused by something simple. Always start with simple fixes first before trying something more drastic. This will save you time and give you statistically the best chance in fixing your issue.

99% of issues that our users have can be found in the Common Issues and Fixes section of our resources. I encourage everyone to read through it carefully as it covers everything that we know that may help you solve your issues. This section is updated regularly with new issues and fixes when they are found.

From my experience, users often have a tendency to jump to the conclusion that if they run into an issue, it’s a rare, complicated, or unknown issue. Sort of like being a…LongMill hypochondriac? This means that many people try to troubleshoot their issues in the wrong place and become frustrated with the machine, rather than checking the most simple reasons for issues. For example, you’d be surprised at how many people reach out to us because their machine won’t work at all because they just never turned on the machine in the first place.

Tip 3: Mechanical and electrical issues happen randomly. Software issues happen exactly the same way over and over again.

The main differentiator between a mechanical and electrical issue versus a software issue is that mechanical and electrical issues seemly happen at random and software issues happen the same way over and over again.

While mechanical and electrical issues can be caused over time by loose fasteners and connectors, wear and tear, and power fluctuations which can happen seemly randomly, software works in a series of exact pieces of code that is rigidly defined. While double-checking firmware settings and reinstalling gSender can help eliminate those as being the issue, if your issue seems random, it’s more likely to be a mechanical issue and updating or reinstalling gSender will not help.

I sometimes joke to Chris that many users use gSender as a scapegoat, as many pin their issues on gSender when they aren’t sure what’s going on. I suspect it’s because its easy to blame something that people don’t feel as comfortable with (aka the software). Sometimes it feels like gSender is messing something up randomly, however, the reality is that the vast majority of issues come from something mechanical.

If you are running into issues with gSender, additional help and documentation can be found here: https://resources.sienci.com/view/gs-feedback/.

Tip 4: Static and EMF cannot cause a machine to lose steps

It is a common misconception that static and EMF can cause a machine to stall or lose steps. The main symptom of static and EMF is a complete disconnect between your machine and CNC. Issues caused by static and EMF will likely cause your machine to disconnect or stop completely. Additionally to note, due to the high draw of tools such as routers and dust collectors, its easy to mistake brown-outs for static and EMF, even though they are completely separate problems.

If your machine is losing position or steps randomly, it’s best to check out the mechanics of the machine first, as static and EMF does not cause the machine to lose its position. Use the process of elimination by turning on and off different tools and dust collectors in your shop while running your machine to identify the culprit.

Tip 5: Let us help you

Don’t forget that our technical support team is here to help answer any questions and help tackle technical issues. Sending us a message with detailed information, videos, and photos of your issue through our Contact Us page.

When you send a ticket, you’re talking to:

  • One of our team members or engineers who designed a certain part of the machine
  • Someone with hundreds, if not thousands of hours of CNC experience
  • The whole technical support team, as tickets and information can be shared between all members

We also use tickets to collect data and improve the quality of our products and make adjustments to our resources.

Reaching out directly to our technical support team is typically the fastest and most reliable way to solve technical issues.

A note from Jason Kent, our Customer Support Manager

Provide as much information as possible. Information such as recent changes or updates made to the machine or software is useful to include.  When reaching out for customer support, please add images or videos relevant to the issue. While family photos are cute, images of the issue help us to diagnose your problem faster.

TLDR:

Tip 1) Observe the mechanics of your machine carefully, such as the sound and the movement, as mechanical issues are the most common in LongMills.

Tip 2) It’s statistically more likely that an issue is caused by something simple. Always troubleshoot by checking basic things first. Troubleshooting guides in our Resources contain fixes for 99% of issues around the LongMill and are regularly updated.

Tip 3) Understand that if the problem happens randomly, it’s most likely a mechanical or electrical issue. Software does not cause random problems.

Tip 4) Static and EMF does not cause stalling or missing steps. Static and EMF causes the machine disconnects or to stop completely.

Tip 5) Don’t forget to reach out to us directly! We can help too!

Sienci Labs Shop Tour 2022

Posted on by

Can you believe it’s been just over two years since we did our last shop tour? Since then we’ve expanded our shop and our team in leaps and bounds. Join me and Chris in our shop tour where we show you where we make our LongMills and other things at Sienci Labs!

Want to see our shop tour from 2020? Check it out below:

November 2022 Production Updates

Posted on by

Hey everyone, here is our Nov 2022 Production Updates.

I’m actually writing this update at the end of October since I’ll be on vacation for the next two weeks, but this should lay out everything we’re working through this month. I’ll be in touch with the team on and off during this time, but figured I’d get this update ready to go.

For all news and updates, please see our Blog.

Just as a reminder, if you’d like to get these updates as a weekly email newsletter, please subscribe here: https://sienci.us13.list-manage.com/subscribe/post?u=720f140325aaa668a8aa09916&id=e18d59a085

Louis is back

After a 10-month hiatus, Louis, our CEO has returned from vacation.

LongMill MK2 and Extension Kit Orders

Production continues to move smoothly for all LongMill and Extension Kit orders. We paused production for about a week while we restocked on lead screws, but we have received the new batch and will continue to have machines go out the door at our regular pace. We’ve also restocked on a new batch of front and back steel feet, gantries, and rails. Lead times for this month should be around 1-2 weeks for most machines.

Batch 6 is nearly over with just over 100 machines left for this batch. Batch 7 will have essentially no differences since most improvements have been made gradually throughout Batch 6. Some of the improvements include:

  • Higher grade washers to prevent bending of the washers used with eccentric nuts
  • Custom machined v-wheels to higher tolerances
  • Additional QA processes including checking variance and tolerances throughout all of our aluminum extrusions

Additionally, we’ve implemented some process changes in the office such as:

  • Kanban for 3D printed parts and some assembled parts
  • Torque settable electric screwdrivers for XZ gantry assemblies to ensure all screws are tight before shipping
  • Specialized measuring tools for checking fit and tolerances
  • Additional foam padding in packaging to reduce denting and scratching
  • SOPs on tablets and QA databases
  • Version tracking for all variations of parts
  • New MRP systems to help keep track of inventory

Our operations team and our staff have generally noted that Batch 6 has been the smoothest batch we’ve had so far with minor issues (except maybe the big one at the start of 2022). We expect Batch 7 to be even better.

Currently, we are looking at seeing ourselves run low in the next few weeks on linear guides and a few small sets of hardware, but are expected to restock in mid-to-late November.

LaserBeam Orders

We are currently stocked on LaserBeams and most orders are going out within a few days. We are also expecting to complete the first batch of roughly 1000 units as well near the end of the year.

Black Friday Sales

As of this time, we do not have any sales planned for Black Friday. We simply believe that providing the same reasonable prices for our products at any time of the year is the best way to run our business. If you’re looking to get into CNCing, we recommend customers order their machines whenever they are ready. We suspect that most customers will find our pricing quite reasonable even when other companies are selling theirs at a discount.

We have never had a discount (with the exception of the Kickstarter campaign) on the LongMill since its release.

At the end of the day, we want people to have confidence that they are getting the best deal on their purchase no matter when they place their order, and we also want to focus more of our time on important stuff like designing machines and growing our community over focusing on selling more stuff.

Just a reminder for everyone to be nice

Something that I am continually grateful for is our active, healthy, and supportive community. We now have nearly 10,000 users across our platforms today from over 30 countries. For all of our amazing community members, thank you for being part of what we are today.

Based on feedback from our support staff and other members of our team, as hobby CNCing becomes more popular and prevalent in our society, expectations and demographics continue to change as well, introducing a wider audience beyond our early group of adopters. Over time, our groups have become more diverse demographically and what people are using their CNC machines for, which is amazing.

It should be noted that although we don’t personally post publically that often, many of us at the company personally stay active on the groups and read most of the posts that you make. I make it a habit to check the forums and Facebook group at least once or twice a day to see how things look in the community and see what’s new, even though it’s rare for me to post or comment in general.

But of course, with every large group, there can be some negativity. We welcome complaints and criticism, whether posted online or directed to us privately, we use these messages to make improvements to what we do on a continual basis. I also hope that customers give us a chance to help them and let us work out the kinks that may arise, as well as open to learning to work with us as we navigate to getting started in a new hobby.

That being said, with recent growth in the community, I have also seen the rate of negative commentary and harassment pointed at us and to the company directly increase as well. I do not accept harassment aimed toward our staff and I have continually been working to help our staff navigate these situations.

In response to this, we’ve worked to create some internal processes and policies to help take care of these matters, as well as post a Customer Support Terms of Service note at the end of our Contact Us page. For our online communities, thank you to our members who’ve stepped up to comment back when people have made negative and untrue comments.

We are people. We have feelings. We love and care about our community and we do our best to make this a fun and accessible ecosystem. Please remember to be nice to us and each other.

End-of-Year Holidays

As we typically do, we are on closing for holidays from Dec 23rd to Jan 2nd. If you have any questions or need anything shipped out, please reach out to us before the 23rd. There may be some of us providing limited holiday support and getting ready for the new year, but the large majority of us will be on holiday.

Making an Adirondack chair on the LongMill CNC

Posted on by

Hey folks. I’m excited to share a new project and all of the files and details to make an Adirondack/Muskoka chair on the LongMill! Scott, our in-house content creator and maker-supreme, wanted to add a few nice, high-quality chairs for his backyard, and so we set out to make a CNCable chair that can be made on the LongMill and basically any hobby CNC of a similar size.

This project was designed by me (Andy) and cut out by Scott in his shop. While this project has a lot of parts, the actual process to make them should be pretty straightforward since a lot of it is repetitive setup and cutting. While this is a perfect project for a beginner, I encourage advanced users to find ways to customize and modify our designs to add their own unique flair.

We continue our series of projects that you can make with your LongMill. To check out the one from before, visit our page here: https://sienci.com/2022/08/04/how-to-make-a-giant-connect-4-on-your-longmill. You can support us by subscribing to our Youtube channel and sharing projects that you’ve made from our designs online! If you have any ideas or projects you want to see us do, feel free to reach out or comment on our social media!

You can find all of the gcode files here: https://drive.google.com/drive/folders/1HEG-XiYE3hG1Z1tJLN5Ur_43JNt-_sXb?usp=sharing

You can find the original Onshape Document here (the recommended version is V4.5): https://cad.onshape.com/documents/0b19b5ee496fd69e78919e94/w/a8b4c856489564350c8ada96/e/4abebe412558dcc22732668c?explodedView=Ml0pbn89RON32w9a4&renderMode=0&rightPanel=explodedViewPanel&uiState=633dac6ace61db730030fc6b

The design process

This was a bear to design. There were a lot of things we learned through the 4 or 5 different iterations it took to hammer it out. During the design process, it’s important for us to not just make a great design, but make it so that:

  • The materials you need for the project can be found universally and at a reasonable price
  • The materials can be of varying qualities but still work
  • The design can fit on a standard 30×30 working area
  • The tooling and techniques to make the project is accessible and easy enough for beginner users

Here’s what some back and forth looked like between me and Scott for making updates:

The newest version has some tweaks made compared to the version in the video which include:

  • Better placement of screw holes
  • Slightly shorter chair to fit knees better

If you see a design flaw, please feel free to let us know.

A foam test chair

Finding the right materials

Finding the right materials for this project was a major challenge. Our first prototype used some 3/4″ cedar boards, but because lumber manufacturers are bad at measuring things, the actual thickness came out closer to 1/2″, but not to a degree of consistency that would let us make good joints without doing extra work planing and cutting down the boards. There was a lot of warp and cupping in the boards, making it even more difficult to fit things together. This resulted in poorly fitting parts and weak spots in the cut boards.

You can probably see it better in these photos and videos below:

The material we finally settled on, deck board, was much stronger, flatter, and thicker. Although its a bit overkill for making a chair, using the higher quality material makes it easier overall to work with. Here’s a link to the material that we used: https://www.homedepot.ca/product/porcupine-5-4x6x8-premium-knotty-cedar-decking/1000167641

3/4″ wood is strong enough for this project, so if you can get it while being dimensionally stable, I would probably get that stuff. The Onshape document does have some variables to help you adjust the size of the model based on the material thickness.

Another slightly annoying constraint was the widths of the wood we could buy for this project. It was important to us to use solid wood, at least for the sake of the asthetics that Scott wanted for his house, so we needed to use standard size boards. In our case, the best option was to use 6in wide boards (or 5.5 – 5.7in roughly), all of the parts needed to fit within that width.

According to Scott, this project uses about 56 feet of board (or 7 x 8 ft boards).

Slotting and lining things up

If you’ve seen some of the other designs I’ve made, I like to have things slot and fit together. The Connect 4 would be a good example.

Well, given the variability of the thickness in the wood boards, even between throughout the board itself, it was hard to make a design that could actually have parts slot together. So I instead removed the need for things to slot together at all. This means that even if your material isn’t exactly the right thickness, you’ll still get a great chair. Basically all of the parts have a line or surface that can be used to line things up when putting the chair together (the arm support triangles are going to need a bit of eye-balling).

Cutting

Originally we had planned to cut the project using 1/4″ bit for the outside profiles and a 1/8″ bit for the holes, but we found that a 1/8″ bit for the whole project was a lot more convenient given that there’s no tool changes involved and less dust to clean up. Using the smaller bit does end up being a bit slower, but since this is a one-off project, time wasn’t a huge concern.

Cutting all of the parts should take about 2, maybe 3 hours. You can use feeds and speeds that you are comfortable with your material, but the gcode provided in the project files are set to 100IPM at 0.2″ depth of cut. It’s likely you can bump up the speed while cutting to your taste with the manual feedrate overrides.

Workholding

Scott suggests using hot glue as a way to keep the part coming out of its spot while cutting. I think this is a pretty good method overall, albiet a bit messy at times. For myself on the otherhand, I will cut the screw holes first and use them as a place to put some wood screws to keep the part in place as the outside gets cut out. Either method works.

Assembly

Please enjoy these exploded views of the chair. You can also check our 3D model as a reference for where things should go.

All of the parts are designed to fit together with quality, #8-1.5″ wood screws. Holes are pre-drilled with the CNC, but you may need to drill additional holes into support parts such as the triangles and the back supports.

October 2022 Production Updates

Posted on by

Hey everyone, here are our Oct 2022 Production Updates.

For all news and updates, please see our Blog.

Just as a reminder, if you’d like to get these updates as a weekly email newsletter, please subscribe here: https://sienci.us13.list-manage.com/subscribe/post?u=720f140325aaa668a8aa09916&id=e18d59a085

Canadian Thanksgiving is coming up this month. Our offices will be closed Oct 7-10th.

Wow we are shipping LongMill orders by the pallet now!

LongMill MK2 and Extension Kit Orders

Production continues to move smoothly for all LongMill and Extension Kit orders. Most machines are shipping out within 1-2 weeks, and oftentimes sooner.

We are expecting to run out of the 1030mm lead screws that are used in various quantities between all sizes of the LongMill around the middle of October.

We have another partial batch expected to arrive at the end of the month, which means that shipping may be paused around this time. We will update our Order Status page with updated information if there is a shipping delay.

We expect lead times for machine orders to be around 1-2 weeks for the next few weeks before we update our lead times when we run out of lead screws.

A small piece of news to share, we have now switched completely to custom manufacturing v-wheels. This means more consistency, quality, and accuracy for the wheels in general, which have been historically a tricky point for us. The quality for the first 30,000 looks to be excellent so far.

LaserBeam Orders

We still have ready-to-go stock on LaserBeams. Most are getting shipped out within a few days.

Ikenna has been doing livestreams for working with the LaserBeam. If you haven’t checked it out yet, make sure visit our Youtube channel!

USD to CAD Exchange Rate

At the time of writing, the exchange rate for USD to CAD is 1 USD = 1.36 CAD. Because our base currency is in Canadian, this means that the exchange rate is heavily in favor of the Americans. That means that while the price for our products is basically the same for Canadians, our neighbors down South can purchase from us at a pretty significant discount.

Based on the reports that I’ve been receiving from RBC (Royal Bank of Canada), their projections are expected to see the USD to CAD conversion continue to be in favor of the USD for some time.

Because our base prices are all in CAD, this means that the margins for each machine decrease as the exchange rate changes in favor of the USD. Thankfully, because most of the material and production costs come in the local area, we are not as impacted as our competitors that have a higher percentage of materials coming from the US and overseas or US competitors selling into Canada. Additionally, much of the purchasing for Batch 7 was done when the exchange rate was around 1 USD = 1.26 CAD, a more favorable rate.

As the continuing economic turmoil continues, it will be interesting to see how us as a business will move forward.

The silver lining to this is that the small discount that our southern neighbors will be getting may stimulate more economic business in Canada.

Stiffness and Deflection Testing on the LongMill MK2

Posted on by

The LongMill MK2 is an exceptionally rigid machine. By optimizing the design, we’re able to build and design a capable machine at an affordable price.

It seems rare for CNC companies to share this sort of data and testing, so it’s difficult for consumers to be able to compare apples to apples on different hobby CNC machines. Hopefully, this is a good start for our industry to work towards bringing better, more rigid machines to the market.

Based on our results, a LongMill experiencing regular cutting forces of 10N, which we’ve determined to be representative of a normal cutting load on a hobby CNC machine, we see that the total deflection is under 0.1mm on both the X and Y axis. Given that 0.1mm is roughly the thickness of a sheet of paper, users should expect a very high level of accuracy for their machines.

We created these tests to show users that even though the LongMill is substantially less expensive than other hobby CNC options, it still offers a highly competitive level of rigidity and that customers are not missing out on something just because we’re so affordable.

Results:

(Tested at 10N)X Axis DeflectionY Axis Deflection
48×30 Longmill MK22.8 thou / 0.072mm3.2 thou / 0.080mm
30×30 Longmill MK22.3 thou / 0.057mm3.0 thou / 0.076mm
12×30 Longmill MK21.9 thou / 0.049mm3.0 thou / 0.076mm

We also did an additional run at 25N, the results are as follows.

(Tested at 25N)X Axis DeflectionY Axis Deflection
48×30 Longmill MK214.2 thou / 0.361mm20.7 thou / 0.525mm
30×30 Longmill MK212.3 thou / 0.313mm18.5 thou / 0.470mm
12×30 Longmill MK213.0 thou / 0.330mm18.2 thou / 0.461mm

For the full report, including my commentary, please read the report below.

Stiffness-Rating-with-CommentaryDownload

Raw data:

MK2-Deflection-TestingDownload

September 2022 Production Updates

Posted on by

Hey there, here’s our September 2022 production update.

For all news and updates, please see our Blog.

Just as a reminder, if you’d like to get these updates as a weekly email newsletter, please subscribe here: https://sienci.us13.list-manage.com/subscribe/post?u=720f140325aaa668a8aa09916&id=e18d59a085

Please note that we will be closed on Monday Sept 5, 2022 for Labour Day. We’ll be back in the office on Tuesday Sept 6, 2022.

Michael our QA engineer going through our latest batch of gantries

LongMill MK2 and Extension Kit Orders

Production continues to move fairly smoothly for all LongMill and Extension Kit orders. We have now cleared the pending queue for 48×30 and Extension kits and now lead times for all machine sizes will be more or less the same. We are expecting lead times to be around 1-2 weeks for most orders for this month.

This past month we did pause production shortly due to us running out of rail extrusions to make 48in X-axis rails, however, we have received another batch of rails that should cover for another 400-500 machines. Because we were working with our extrusion manufacturer to work out some kinks in the consistency of the rails, which placed the order on hold rather than going to press. Thankfully they were able to move the extrusions to the weekend schedule and have them made with only a few days of added delay.

X and Z gantries we also ran out as well have also been restocked. The next thing we’re expecting to run out of are the front and back steel feet for LongMill MK2 machines which we currently have 70 units worth left, however, those should be restocked back around the end of next week.

LaserBeam Orders

We are now stocked on enough LaserBeam units to last till the end of the year. Most are shipping out within a few days.

Batch 7 Production

We are now at the final third of Batch 6 Production. This means that we’re at our last 500ish machines, and we’ll be getting to the end of the batch sometime likely in December. Depending on the status of our shipments, our lead times may change around this time.

Batch 7 production has been underway for the last few months and we’ve been getting parts in to prepare. There won’t be any major changes but we’ve made some small tweaks to production overall including:

  • Small tweaks to the design of the 5mm to 8mm coupler to help customers identify which side goes on which side
  • Fully custom-produced v-wheels to improve quality control and consistency of the wheels

Some additional changes to our production reflected in Batch 6 and 7 include:

  • New tools to check the consistency of all of our rails
  • Additional checks to ensure the flatness of all gantry plates and other steel parts
  • Individual motor tuning on all control boards

When we started Batch 6 in 2021 and early 2022, we were at the height of the pandemic and supply chain constraints. Recently, we’ve seen lower lead times, shortages, and transport times than before, so we are hopeful that this new batch of machines will have a smoother production process than before.

Price increases from UPS

UPS has recently informed us that they will be charging an “Additional Handling Fee” on shipments weighing over 50lbs. Previously this limit was set to 70lbs. This means that some shipments on new orders may see roughly a $10 increase on LongMill shipping prices on new orders placed Sept 6. We are working with UPS to negotiate and reduce the impact of this charge.

August 2022 Production Updates

Posted on by

Hey everyone, here is the update for this month. For all news and updates, please see our Blog.

Just as a reminder, if you’d like to get these updates as a weekly email newsletter, please subscribe here: https://sienci.us13.list-manage.com/subscribe/post?u=720f140325aaa668a8aa09916&id=e18d59a085

Not too much new to report, so this will be a shorter post than usual.

LongMill 48×30 and Extension Kit Orders

We did have a stop in production last month for a short period of time as we got shorted some Y gantry plates for the 48×30 and EX plates but that has now been resolved. We’ve shipped out another batch of around 50-60 machines since.

Because of a higher than expected number of orders for the 48x30s, we are currently out of stock on X rails and are waiting for another delivery of material on August 12th. While we expected 48×30 machines to make up around 30-50% of our machine sales, we’ve now found that the larger variant has recently become nearly 60% of our sales in the last month. The new batch of rails that are on the way has been adjusted to reflect the new ratio.

Once the rails arrive, we will ship machines out again and should take about 2 weeks to complete the remaining queue.

LongMill 12×30 and 30×30 Orders

Orders for LongMill 12×30 and 30×30 have been mostly shipping out within one business day. We currently have parts in stock and ready to go.

LaserBeam Orders

We have received new drivers and are currently packing and shipping the rest of the queue. Most customers should have gotten theirs shipped already, and most new orders are going out within a week. If you have a machine on order waiting to be shipped, the Order Status page may not show as completed since both items haven’t shipped yet.

How to make a Giant Connect 4 on your LongMill

Posted on by

Hey everyone. We’re excited to share another really awesome project tutorial for your LongMill! If you want to check out the last project we did, please check out our article Make your own CNC workholding with your LongMill!

For all of the project files, gcode, and DXFs, please check https://drive.google.com/drive/folders/13dB2GdV_zdN0aFZ8ULrZV_tzBj3636fF?usp=sharing to download.

For the Onshape project, see https://cad.onshape.com/documents/f24bc250089e8290988cf97f/w/118c48f226a5c07c6859a878/e/67296551e93f8799debc4d14?renderMode=0&uiState=62ec1d8fc0c2246fe5c7b44e

Parts and Materials:

All you need for this project is a sheet of 1/2″ plywood and a 1/8″ end mill. Everything fits and slots together with friction and some persuasion with a mallet. If you want to use a different size material and modify the dimensions of the design, we’ve included a few variables that can be adjusted in Onshape for your specific materials.

By default, we made it so that the thickness of the wood is 0.5in, the thickness of each puck is 0.5in, and the diameter of the pucks are 3 inches in diameter. You can change the number in the variable to change the dimensions. If you use the pre-made project files and gcode, we’re assuming your material is 0.5in. Although most 0.5in plywood will work, if you want materials to fit perfectly, you can measure the thickness of your material with calipers, input that as a variable, and all of the slotting surfaces will automatically scale up or down, with additional clearance added in key areas to slot things smoothly.

Since the LongMill 30×30 is our most popular size, we’ve made everything work on the 30×30 size. Below is a diagram of how we broke down a 4×8 plywood sheet into sections for the LongMill.

Onshape offers a free, hobby and education use license that offers the full functionality of their program on the cloud, with the exception that all projects made on the free plan are public and searchable. This means that derivatives of this design will also be available to the public.

To modify designs, you will need to create an account on Onshape and duplicate/copy a new version to make changes. A few other notes:

  • When importing your DXF into a CAM program like Carbide Create or Vectric, please note that if they are coming out the wrong size, you may need to change your project units. I’ve found that setting the project units to inches usually works the best. Alternatively, you can scale them to the right size.
  • DXFs from Onshape are not usually joined, so you may need to use a “join vector” tool before creating toolpaths.

Most CNC users will likely want to export all of the parts as DXFs. This is a very easy process. Simply right-click the side of the model you wish to export the face of and “Export as DXF/DWG”. Then import the vectors into the CAM software.

https://cad.onshape.com/help/Content/exporting-files.htm

For these projects, we used a 1/8″ end mill. Since we’re working with plywood, a down-cut end mill will work well, but a compression bit might work even better. You should be able to use any 1/8″ bit, but if you want to buy some from us, you can find them below:

1/8″ Flat Downcut End Mill
1/8″ Flat Compression End Mill (2pcs)

General Cut Settings

If you are making your own gcode, you can adjust your speeds and feed accordingly. The gcode made for this project is fairly conservative and should work for pretty much any type of wood. You can increase and decrease your feeds and speeds using Feedrate Overrides in gSender or most feature filled gcode sender.

Here are some tips that might help otherwise.

  • Use ramping to help smooth out your cut. There are many small parts to this project that are prone to flying out. Ramping reduces the cutting loads when moving between each pass and prevents the part from breaking or shifting.
  • Use a smaller final pass. In some CAM software, you can set a final pass. This is the thickness of the last pass. By making the last pass smaller, you can prevent your part from flying out as the cutting loads are smaller.

This project was made with VCarve Pro, which has all these features. If you’re looking for free CAM software that can handle 2D DXFs for this project, I’d recommend Carbide Create as an excellent option.

Assembly

Start by cutting all of the parts out. You should end up with a couple of big parts and a bunch of small parts that keep all the big parts together. Here are a few exploded views to help out, but overall, the assembly can be found in the instructions.

A few notes:

  • Using some scrap wood to help direct your mallet blows will help keep your parts from breaking.
  • Putting in the “pirate teeth” on the one side first before assembling the second half, rather than putting both big sheets on first and putting the teeth on after, rather the way it was shown in the video may help keep things from shifting when assembling the two halves together. This will also help protect the tabs from breaking from the other side as well.
  • We’ve made some changes to the design between the video and the final public version to help things fit better and make tweaks. If you have some differences in your design, don’t worry too much as you’ll probably have the better version! However, if you run into any issues, feel free to reach out.

I hope everyone enjoys this new project. Stay tuned for new projects coming down the pipeline and make sure to subscribe to our Youtube!

USMCA Tax Exemptions on Orders to the US

Posted on by

For a full list of USMCA certified items, please see this list.

UPDATE #4 (April 11, 2025)

Shipments under USMCA certification still qualify to enter into the US without duties and taxes. We are checking shipments before they leave to see if they qualify. Qualifying shipments will be placed under DDP, so that we are billed duties and tariffs. More information can be found here.

Items that do not qualify have been temporarily removed from the store for US customers.

UPDATE #3 (March 4, 2025)

Due to the ongoing 25% tariffs on certain goods shipped to the United States, we will no longer be offering orders under DDP (Delivered Duty Paid) or DAP (Delivered at Place) terms starting March 4, 2025 at 3:00PM EST). Moving forward, all US-bound shipments will be processed under standard shipping terms, with customers responsible for any applicable duties and import taxes.

Existing orders prior to the announcement will still be DDP or DAP, and we will cover the cost of the 25% tariff.

If tariffs are lifted prior to your order shipping, we will resume offering orders under DDP and DAP.

As of current, the De Minimis value threshold has not changed. This means that shipments from Canada to the US under $800USD are not subject to duty. However, we are unsure if these rules will change in light of the 25% tariffs.

UPDATE #2

Due to some changes for shipments going from Canada to the US, we may need to contact some customers for Tax ID numbers to help facilitate the customs process. Please keep an eye out for an email or call from us once your product ships if the value of your shipment is above $800USD.

UPDATE #1

Since June, we’ve started shipments placed for US orders as DDP or DAP (Delivery Duty Paid or Delivery at Place), which means that customers have not been charged for duties and taxes on shipments. We’ve been monitoring and testing our system for the last few months to make sure it was all working properly.

I’m happy to announce that things have been working as they should and we are letting everyone know that going forward our American customers won’t have to worry about duties and taxes when ordering from us! This means that any duties, taxes, or brokerage fees will be billed directly to us.

For our previous update and additional details on this topic, please visit https://sienci.com/2022/06/21/update-on-duties-and-taxes-to-the-us/.