CNC FAQ


Answering all of your CNC Questions

For both STEPCRAFT and Non-STEPCRAFT CNC Systems

Understanding the Homing Procedure

Whenever you open UCCNC, the very first movement you should make with your machine is "Home All". On a STEPCRAFT, the homing procedure begins with the Z-Axis, then the X-Axis and finally the Y-Axis. Each axis will run towards its limit switch until it engages the switch, then will run the opposite way until the switch disengages. Once all three axis have hit their limit switch, your machine is now ready to travel the full length of each axis!

This is known as a reference movement for the machine. Without this reference movement, the machine has no idea where it is along its axis and may not travel the full length back and forth. If your machine is stopping short of the full length of travel and you aren't noticing any binding, make sure to "Home All" and try running again.

One important thing to note is that if any axis ever travels in the opposite direction of its limit switch when homing, check to make sure a limit switch is not engaged somewhere on the machine. All of the limit switches are on the same circuit, so if you tried to home your machine and the Y-Axis limit switch was pressed, the Z-Axis would travel in the OPPOSITE direction. This happens because the machine is going through the stage of homing when it backs away from the switch until it disengages. Because the Y-Axis switch was pressed, the Z-Axis will infinitely try to move away but it will never disengage.

UCCNC CNC Basics 4/17/20, 2:58 PM 3,795 Views Direct Link

If your project is coming out incredibly small in UCCNC (e.g. 1/10th the size designed) you are most likely using the incorrect post processor. Every post processor used with a STEPCRAFT machine should end in (mm). This is because UCCNC will only accept millimeters as a parameter! Even if your project is designed entirely in inches, the (mm) post processors will automatically do the conversion from inch to mm for UCCNC to properly interpret. This means that you can design in inches, millimeters or anything you choose, and the post processor will always do the proper conversions for you. It is a very common mistake to select the (inch) post processor when working in inches. This will NOT do the proper conversion and UCCNC will interpret every inch measurement as a millimeter measurement. This is why the project, when saved with the incorrect (inch) post processor, will come out very small.

CNC Basics Project Design 4/17/20, 2:53 PM 1,904 Views Direct Link