Last Update: 17 October 2019

Choosing your wasteboard and mounting your machine to your wasteboard

The LongMill is designed to be mounted to a wasteboard provided by the user. This is a sheet of material on which the LongMill mounts to, and what the material you will cut will sit on. The wasteboard is designed to be cut into and replaced when needed.

We do not ship LongMills with a wasteboard

  • It saves the cost for shipping. For example, a 4ftx4ft piece of 3/4″ MDF shipped often costs over a hundred dollars in shipping and is very easy to damage during transit. You can usually find a full 4ftx8ft sheet of 3/4″ MDF for under $60 at your local lumber or hardware store.
  • Users can choose the size and material of the wasteboard to match their needs.

The material of your wasteboard

We recommend a flat, clean piece of 3/4″ MDF as your wasteboard. However, any thick, flat piece of material that you are able to screw into will work.

The size of your wasteboard

  • LongMill 12×12: Fits on a 2ft x 2ft surface
  • LongMill 12×30: Fits on a 2ft x 4ft surface
  • LongMill 30×30: Fits on a 4ft x 4ft surface

You can ask your local lumber or hardware store to cut it down to size if needed.


Area Name Configuration Width [mm] Length [mm] Width [in] Length [in]
Foot Base 12×12 610 525 24 20 11/16″
Foot Base 12×30 1100 525 43 5/16″ 20 11/16″
Foot Base 30×30 1100 1024 43 5/16″ 40 5/16″
Total outline All 250 +88 +1 5/8″ +3 1/2
Control box All 250 204 4″ 8″


Some things to be mindful of:

  1. As mentioned previously, these measurements are not exact until we finalize the machine
  2. The total machine outline is a constant amount, no matter which machine configuration you have. For example, the 30 x 30 with the added stickout of certain components will be:
    – Width = 1100 + 40 = 1140mm
    – Length = 1024 + 88 = 1112mm
    *This can be applied in imperial units too.
  3. The control box has buttons on the top which can Play, Pause, and Stop the machine’s motion so it’s a good idea to keep it mounted near your CNC. It also will have a USB input on the left side, motor and other outputs on the right side, and the power input on the back side, so make sure to keep some space around it for cable management.

Mounting your LongMill to your wasteboard

To ensure that your machine is mounted securely and accurately, we’ve created a series of steps to help you do so. We highly recommend following these steps exactly, as the order of these steps matter.

We will start by checking the tension of the Delrin v-wheels. As we did in the previous steps, we want to make sure that the wheels barely turn with our fingers by adjusting the eccentric nuts.

We will also properly tension the Delrin anti-backlash nuts. Turn the tensioning screw a little bit at a time. Check for play by moving the gantry back and forth and seeing if there is any excess movement. Do not over tighten, usually a half turn is more than enough.

Gently put your LongMill on the wasteboard. Shuffle it over roughly where you want it. We typically like to leave room on the left side for the electronics box to sit. In this case, we actually had to get the MDF cut to 42 inches to be able to fit it into the car. So we’ll just be mounting it in the middle as there is not enough room for the electronics box to sit on the side.

Move the machine onto your wasteboard. Position it to where you want it.

Line up one of the Y-axis rails to how you want, and start by screwing in the feet. We’ll be using the left side as a reference. You can use the wood screws provided, or use your own depending on your material or thickness. In your kit, you will find an assortment of screws of different lengths.

Some of these screws WILL go through 3/4″ MDF. Before you screw in the feet, make sure that the surface under the wasteboard will not be damaged if you do have screws coming out the bottom.

Your kit will probably come with a set of 1-1/4″, 1-1/2″, and 2″ screws.

Start by moving the machine all the way to the rearmost position. Your machine will stall out, and that is ok. This will get the rear to feet lined up in parallel with each other.

Move the machine to the very back until it stalls.

Then. we’ll move the machine a couple of inches forward and screw in two wood screws (1-1/4″) into the first two spots.

Put 1-1/4″ screws in these two spots.

Next, we’ll put screws in the other two spots on the same side, this time on the middle feet.

Put 1-1/4″ screws in these spots.

We’ll now go along and screw in all the feet diagonally. Use your 1-1/2″ screws in these spots.

Put 1-1/2″ screw in these spots.

At this point, one side of your machine will be fully secure. We’ll be using this side as a reference to get the opposite side parallel.

At this point, run the machine up to the very front, then the very back, then a few inches forward.

Move your machine all the way forward, then all the way back (until it stalls), and to this position.

Put a 1-1/4″ screw for the top left foot.

Put a 1-1/4″ screw in this spot.

We’ll move the machine down another couple of inches so that it is roughly in the middle.

Use 1-1/4″ screw to secure the two feet.

Put 1-1/4″ screws in these spots.

Now, move the machine down again. We’ll put a 1-1/4″ screw in the front left foot.

Put a 1-1/4″ screw in this spot.

Now move the machine again to the middle spot and use 1-1/2″ screws in the diagonal mounting holes.

Put 1-1/2″ screw in these spots.

Your machine should now be fully secure to the wasteboard. From this point, you should be ready get cutting your first jobs!