Thanks Sean. Luckily, I have enough cable to get out of the bending zone so if I need to splice some cheaper stuff in, I should be okay.

By fixing the cable chains on the drawings, I can now also start to give accurate cable lengths. A huge mistake is to cut the motor cables into 4 equal lengths - there is a big difference in the cable to the x-motor nearest the control box and cable to the z-motor.

Today, I added the cables to my machine which is built to cut 49 X 97 inch sheets of plywood. In order to calculate how long to cut the cables, I took alot of measurements. I figured new builders could use this information when placing their orders so that they don't order too much or too little.

My recommendation is that a new builder wait until he has the table, gantry and car built and the e-chain installed so he can take his own measurements. He should also thoroughly understand the E-stop, pause and resume circuits so that he can mentally walk through the process of routing the cable. It isn't complicated but it also isn't as simple as it may seem. I routed my E-stop circuit incorrectly and I wasted some wire that I now have to reorder.

**IMPORTANT**: The cable lengths I'm showing below are from the point where THE CABLES ENTER THE MACHINE. That is the point where the e-chain is anchored to the table. If you order your cables without adding the distance to the floor, across the floor to the wall and up the wall to your control box, YOUR CABLES WILL BE TOO SHORT. You must decide how far the control box will be from your MM and how high the box will be on the wall and add that to your order. Also, ensure that you include in your measurement the distance inside the box to the component to which you will connect the cable (relay, Gecko, Terminal, etc.).

- Stepper motor cables. Each motor is connected directly to its Gecko drive in the control box using a 4 core cable.

Z-axis motor - 18 feet 6 inches + distance to control box
Y-axis motor - 18 feet 8 inches + distance to control box
X-axis motor (front) - 16 feet 6 inches + distance to control box
X-axis motor (back) - 7 feet 6 inches + distance to control box

- Router motor cable. The router is connected to the relay in the control box. You only need one of these two core cables. Its length is 18 feet 6 inches + distance to control box

- E-stop circuits. There are two E-stop switches under each E-stop operator (or button). One switch is connected to a circuit that shuts off the contactor. You need a separate 2 core cable for this circuit. The other switch is connected to a circuit that uses the PMDX breakout board to perform the stop. The wires for that circuit are part of the seven core cable. The other wires in this cable are for the pause and resume circuits. Both the 2 core cable and the 7 core cables are the same length overall and may be routed along side each other.

Both the 2 core and 7 core cables will be divided into three pieces:

• The first cable will be 7 feet 6 inches long + the distance to your control box. That cable will run from the control box through the X-Axis echain to the E-stop/Pause/Resume box mounted on the gantry on the backside of the MM.
• The second cable will be 9 feet long and will run from the E-stop/Pause/Resume box mounted on the gantry on the backside of the MM through one of the gantry tubes to the E-stop/Pause/Resume box mounted on the gantry on the front side of the MM.
• The third cable will be 11 feet long and will run from the E-stop/Pause/Resume box mounted on the gantry on the backside of the MM through the Y-axis echain to the E-stop/Pause/Resume box mounted on the car.

Be sure you connect the E-stop switches in series.


Please make sure you give yourself some additional wire so that you have working room to strip and make connections to the switch terminals.


If you are building a machine that cuts larger sheets of plywood, you will need to change these lengths.