The SuperLongBoard, or “SLB“, is an advanced, next-generation, plug-and-play, CNC controller for all generations of the LongMill. The SLB allows your CNC to run faster and more reliably. We believe the SLB is the most significant upgrade in functionality and performance for all LongMills, past and present.
Each order will comes with:
A SuperLongBoard in a robust aluminum enclosure with 4 mounting holes for screws sized #4 to #8
Independent E-stop with 3 customizable action buttons
2.5m E-stop cable
1m USB-C to USB-A cable
Mounting bracket, specifically for the Y-axis of a MK2/2.5 (not MK1)
The only other things you’ll need to purchase are:
For custom setups, the SLB ships with all 3.81mm green pluggable terminal connectors by default. If you need the 5.08mm connectors for connecting power and motors, please indicate this in the order comments during checkout. Any remaining ones you’ll need to get yourself
Additional information
Weight
3 lbs
Dimensions
15 × 6 × 3.5 in
Measurements
The SuperLongBoard is a typical PCB with a roughly 210 x 100 x 20mm (8.3x4x0.8”). You can find full details on the technical manual of the SLBResources page.
For custom setups, the SLB ships with all 3.81mm green pluggable terminal connectors by default, plus we can include the 5.08mm connectors for connecting power and motors if you email us before ordering, but any remaining ones you’ll need to get yourself
FAQs
Q: Can the SLB work on my LongMill?
A: The SLB is compatible with ALLLongMills. No matter what size, generation, or version you have, the SLB will plug and play with existing LongMill hardware of all generations with minimal settings changes. We believe this will be one of the most substantial upgrades any LongMill can have, past or present!
Q: Will the SLB come default with the LongMill in the future?
A: Yes, starting with our new batch of MK2.5 LongMills the SLB will now ship standard with the machine. This also comes with an associated price increase to reflect the additional value we believe the SLB provides.
Q: Will the SLB work with my CNC?
A: If it’s a LongMill or AltMill then definitely it will. Otherwise, your CNC should be supported so long as it’s a typical hobby CNC setup with open-loop Nema 23s. As we roll out the SLB we’ll begin hearing back on other successful configurations and update this ‘Answer’ appropriately, since otherwise we can’t provide a definitive guarantee other than to say that it’s very likely to work for most hobby CNCs. Other machines that have been proven to work so far include Onefinity.
We’ve earnestly done our best to ensure the SLB would be ideal for any typical setup since the inspiration for the SLB came from trying to take things that are normally only available on more expensive and ‘closed’ boards and bring them into the open source domain and at a more affordable price for the benefit of as many hobbyists as we could. This means that although you will need to change certain settings to match your specific setup, the SLB will support a range of machines and accessories including 5/24V limit switches, touch plates, tool length sensors, laser diodes, external 4th axis, and more.
Q: What about if I want to use higher voltage or external motor drivers?
A: We do currently have another version of the SLB in the works that we’re calling SLB EXT since it’ll support much higher voltage and external motor drivers for closed loop support as well. This will extend even further SLB support for a broader range of machines and setups closer to production-level. This board will be what powers our AltMill CNC and you’ll be able to see more updates about it on our blog as we begin making deliveries.
Q: How can I know if the SLB is right for me?
A: There are many other offerings on the market that come with a wide range of features, simply put the choice between these will always come down to budget. If you don’t think you need the features offered by the SLB then it’d make more sense to spend less money. In this case consider getting a more typical grbl board or some of the newer x32 hobby CNC boards that might require more DIY setup time for wiring or programming. For instance the Blackbox x32 has the benefit of a direct wireless connection but less extensibility. If instead you feel like you want to pull all the stops to support a higher-end CNC or use more advanced features then you might want to increase your budget and look into a Centroid, UCCNC, or Mach setup. We believe though that we’ve done our best to match the SLB up with the mid-level hobby CNC community where it makes sense to spend $150-200 on a controller to really unlock all the capabilities you’d be looking to expect out of your $1000-4000 CNC.
Q: Is the SLB open source?
A: Yes, the SLB, firmware, and related software like gSenderwill be released open source. This may come at a later date when we feel that our designs are finalized and should be available soon on our Resources pages.
Q: Will the SLB support external drivers?
A: Although we will support an external A-axis driver support to allow full 4-axis motion with the Vortex Rotary Axis, the SLB will not have support to external drivers for the X, Y, and Z axis.
Q: Will the SLB support accessories like the Vortex Rotary Axis, AutoZero touch plate, or LaserBeam?
Yes, the SLB will support all of our existing accessories for the LongMill, as well as opening up additional improvements and functionality to accessories, such as improved laser motion control, fully independent 4th axis control, and improved speed and sensitivity on touch probes and plates.
Q: Will the SLB support tool changers?
A: The SLB does come with the hardware to support the IO for a tool changer, such as relay control and tool length sensor inputs. However, we have not yet tested the functionality for a tool changer with the LongMill.
Q: Does the SLB come with a warranty?
A: The SLB comes with a standard 90-day warranty once it arrives at your door against all manufacturing defects. For further conditions, please check out the warranty tab on this page.
Warranty
The SuperLongBoard comes with a 90-day warranty starting at the time of arrival to the customer against manufacturing defects. Those 90 days are also covered for use of the board as long as it uses:
A correctly-spec’d and high-quality power supply like our 24V 10A or 24V 12.5A
Tested and approved firmware developed by Sienci Labs without modification to the source code
Please note that power supplies with the incorrect output voltage and/or current may damage the board. We also strongly recommend using default or recommended settings for the SuperLongBoard. Damage caused by incorrect settings may not be covered by warranty or assessed on a case-by-case basis.
This video also provides some insight on everything you need to know about setting up your SuperLongBoard
95 reviews for SuperLongBoard
4.5
Based on 95 reviews
5 star
75
75%
4 star
13
13%
3 star
2
2%
2 star
4
4%
1 star
4
4%
Rated 5 out of 5
Matt Gong (verified owner)–
The SLB has been great. It has made my Longmill 30×30 MK2 much quicker and quieter. It was simple to remove the longboard and to install the SLB and to get it all up and running again. I’m looking forward to maybe adding a small spindle or the autopsic T1 once it is released so that I can control the RPM of the bit from my computer. Also, I’d like to add a rotary at some point but I’m really just getting into CNC and still just in the learning stages.
(0)(0)
Rated 4 out of 5
Damon S. (verified owner)–
I had some initial frustration when receiving and installing the Super Longboard, and once over that small hurdle the installation was very easy. I was replacing an X32 controller and moving to gSender for my Onefinity Journeyman Pro cnc. Because this was replacing the x32 just about all of the wires were already where I needed them which aided in the quick installation. Documentation was very good online. Compared to the X32 controller, the motors when using he SLB are much quieter! The SLB plays very well with gSender and even though it is a huge improvement over Control (which is a great controller too), gSender just has to much more to offer. My only current issue is the periodic disconnects when when running a job which I find very frustrating and at times a waste of time and wood, though I do hope to remedy that his weekend by switching over to a shielded ethernet cable from the usb-c cable in hopes that helps with a more stable connection.
(0)(0)
Rated 5 out of 5
Jim Leftwich (verified owner)–
I’m using the SLB on a home built rotary router and it works great. very smooth and consistent
(0)(0)
Rated 5 out of 5
Phillip Belnap (verified owner)–
I don’t really have anything to compare it to so for me it has worked well without any problems.
(0)(0)
Rated 5 out of 5
Edda Ingram (verified owner)–
Great improvement, cleaner process
(0)(0)
Rated 4 out of 5
Kevin Sackett (verified owner)–
It seems to be a lot smoother and faster
(0)(0)
Rated 4 out of 5
julian t. (verified owner)–
very easy to set up and uses
(0)(0)
Rated 5 out of 5
Gary Holland (verified owner)–
I’ve had a few boards before .Didn’t last long very disappointing. Ordered SLB arrived 8 days early than expected date .connected up to machine used grblhal for first time excellent. Also new gsender is really first class worth the wait makes using the machine a joy not a chore
I need to order latest probe form you which will streamline my operation of the machine.
(0)(0)
Rated 5 out of 5
Nathan Bailey (verified owner)–
Very happy with the ease of retrofit and ability to upgrade firmware.
(0)(0)
Rated 2 out of 5
Allan (verified owner)–
Since I had the issues I found another place to buy adrino boards so I am still using my original controller
(0)(0)
Rated 5 out of 5
Glen Chapman (verified owner)–
I have not installed it yet, but in the next 60 days, yes 🙂
I’m sure it will be awesome just like the older version.
(0)(0)
Rated 5 out of 5
Pierre Smit (verified owner)–
The best controller I have used so far
(0)(0)
Rated 5 out of 5
Bruce (verified owner)–
Got setup and working great
(0)(0)
Rated 5 out of 5
gar whitenton (verified owner)–
This is a wonderful product! I own a 30×30 MK2, and the improvements the new Super Longboard have made far exceeded my expectations! It is quieter and faster. One of the best things about it, that many might not give much thought to, is the addition of the ethernet port to use for control allowing me to finally ditch that pesky USB cable. Thank you Seinci Labs for a good job done!
(0)(0)
Rated 1 out of 5
kent kelley (verified owner)–
I ordered an altmill about a year ago. After assembling the new machine I hooked up the power source to the control board. When I did it sparked and smoked in about 5 or 6 different spots. not knowing for sure what happened I continued to work on the machine. Long story short I haven’t made a single chip with the damn thing. I haven’t been happy at all. What I would like to do is send the original board back and have your team check it out. If it is faulty send me a new one. I had very high hopes of really liking this machine but so far the whole experiance has been very disappointing.
(0)(0)
Rated 4 out of 5
Georges Pelletier (verified owner)–
Bon produit, et très bon service, quoique l’interrupteur d’urgence même s’il était prémonté avec son fil n’était pas connecté à l’intérieur de son boîtier.
(0)(0)
Rated 2 out of 5
Allen Carter (verified owner)–
When I changed the cable from regular long board to computer my disconnect problem went away. Have not installed the SLB yet. I enjoy my CNC very much. I do have a complaint about gSender that has not been addressed even though reported multiple times. From comments on 1.5 the issue has not been resolved. On restart from a specific line number the feed rate drops to 3 inches per minute or less. The issue began with1.4.12 and has continued. Many of my carves are paused or stopped overnight. On restart the ipm changes. Until issue is resolved I am unable to update gSender and concerned about installing theSLB.
(0)(0)
Rated 5 out of 5
Richard Kouba (verified owner)–
Had a problem with the Long Mill doing erratic things shortly after I bought it, so I changed the super log board and everything works fine now.
I make small 4″ x 8″ boxes to give away to friends and family. One of the time savers with the CNC machine is cutting the hinge slot vs using a chisel. It is also safer. Still learning and I am very happy with the Long Mill CNC machine.
(0)(0)
Rated 1 out of 5
LOAL (verified owner)–
Just don’t see the improvements that I had hoped for – especially since I got it primarily for use with the Vortex rotary axis. From my perspective, both seem a waste of money. Together they feel like something cobbled together with baling wire and chewing gum.
(0)(1)
Rated 5 out of 5
Kevin (verified owner)–
The SLB is a great upgrade to my LMMK2
(0)(0)
Only logged in customers who have purchased this product may leave a review.
Matt Gong (verified owner) –
The SLB has been great. It has made my Longmill 30×30 MK2 much quicker and quieter. It was simple to remove the longboard and to install the SLB and to get it all up and running again. I’m looking forward to maybe adding a small spindle or the autopsic T1 once it is released so that I can control the RPM of the bit from my computer. Also, I’d like to add a rotary at some point but I’m really just getting into CNC and still just in the learning stages.
Damon S. (verified owner) –
I had some initial frustration when receiving and installing the Super Longboard, and once over that small hurdle the installation was very easy. I was replacing an X32 controller and moving to gSender for my Onefinity Journeyman Pro cnc. Because this was replacing the x32 just about all of the wires were already where I needed them which aided in the quick installation. Documentation was very good online. Compared to the X32 controller, the motors when using he SLB are much quieter! The SLB plays very well with gSender and even though it is a huge improvement over Control (which is a great controller too), gSender just has to much more to offer. My only current issue is the periodic disconnects when when running a job which I find very frustrating and at times a waste of time and wood, though I do hope to remedy that his weekend by switching over to a shielded ethernet cable from the usb-c cable in hopes that helps with a more stable connection.
Jim Leftwich (verified owner) –
I’m using the SLB on a home built rotary router and it works great. very smooth and consistent
Phillip Belnap (verified owner) –
I don’t really have anything to compare it to so for me it has worked well without any problems.
Edda Ingram (verified owner) –
Great improvement, cleaner process
Kevin Sackett (verified owner) –
It seems to be a lot smoother and faster
julian t. (verified owner) –
very easy to set up and uses
Gary Holland (verified owner) –
I’ve had a few boards before .Didn’t last long very disappointing. Ordered SLB arrived 8 days early than expected date .connected up to machine used grblhal for first time excellent. Also new gsender is really first class worth the wait makes using the machine a joy not a chore
I need to order latest probe form you which will streamline my operation of the machine.
Nathan Bailey (verified owner) –
Very happy with the ease of retrofit and ability to upgrade firmware.
Allan (verified owner) –
Since I had the issues I found another place to buy adrino boards so I am still using my original controller
Glen Chapman (verified owner) –
I have not installed it yet, but in the next 60 days, yes 🙂
I’m sure it will be awesome just like the older version.
Pierre Smit (verified owner) –
The best controller I have used so far
Bruce (verified owner) –
Got setup and working great
gar whitenton (verified owner) –
This is a wonderful product! I own a 30×30 MK2, and the improvements the new Super Longboard have made far exceeded my expectations! It is quieter and faster. One of the best things about it, that many might not give much thought to, is the addition of the ethernet port to use for control allowing me to finally ditch that pesky USB cable. Thank you Seinci Labs for a good job done!
kent kelley (verified owner) –
I ordered an altmill about a year ago. After assembling the new machine I hooked up the power source to the control board. When I did it sparked and smoked in about 5 or 6 different spots. not knowing for sure what happened I continued to work on the machine. Long story short I haven’t made a single chip with the damn thing. I haven’t been happy at all. What I would like to do is send the original board back and have your team check it out. If it is faulty send me a new one. I had very high hopes of really liking this machine but so far the whole experiance has been very disappointing.
Georges Pelletier (verified owner) –
Bon produit, et très bon service, quoique l’interrupteur d’urgence même s’il était prémonté avec son fil n’était pas connecté à l’intérieur de son boîtier.
Allen Carter (verified owner) –
When I changed the cable from regular long board to computer my disconnect problem went away. Have not installed the SLB yet. I enjoy my CNC very much. I do have a complaint about gSender that has not been addressed even though reported multiple times. From comments on 1.5 the issue has not been resolved. On restart from a specific line number the feed rate drops to 3 inches per minute or less. The issue began with1.4.12 and has continued. Many of my carves are paused or stopped overnight. On restart the ipm changes. Until issue is resolved I am unable to update gSender and concerned about installing theSLB.
Richard Kouba (verified owner) –
Had a problem with the Long Mill doing erratic things shortly after I bought it, so I changed the super log board and everything works fine now.
I make small 4″ x 8″ boxes to give away to friends and family. One of the time savers with the CNC machine is cutting the hinge slot vs using a chisel. It is also safer. Still learning and I am very happy with the Long Mill CNC machine.
LOAL (verified owner) –
Just don’t see the improvements that I had hoped for – especially since I got it primarily for use with the Vortex rotary axis. From my perspective, both seem a waste of money. Together they feel like something cobbled together with baling wire and chewing gum.
Kevin (verified owner) –
The SLB is a great upgrade to my LMMK2