Autozero, motor tuning issues

[Ricahrd_M (RichardM)]

I generally use aspire software and mach3 for CNC.

1. I use an autozero probe to zero the Z axis on the Mach3. Can the Compass CNC have this feature? And what’s Z axis height/limit of movement?

For example, in Mach 3, we use a script like this:

ZCurrent = GetOemDro(802)
GageH = GetOEMDRO(1001)
ZNew = ZCurrent - 300
Code “G90F200”
SetOemDRO(818,200)
Code “G31 Z” & ZNew
While IsMoving()
Sleep(10)
Wend
Call SetDro (2,GageH)
FinalMove = GageH + 10 '10 is either 10mm or 10Inch, Please Change.
Code “G0 Z” &FinalMove

2. Sometimes, I enter 2 inches as the machining value, but the actual machining is 2.01 inches. In this case, Mach3 adjusts the motor speed. Is there a function for this?

3. To use in Mach3 on Aspire CAM, save as a *.txt file and read the *.txt file in Mach3. What file format does Compass CNC read?

Thanks,

Richard M

[camchaney]

@Ricahrd_M

I use an autozero probe to zero the Z axis on the Mach3. Can the Compass CNC have this feature?

That’s not currently a feature. The Z home is set manually using the knob above the mainFrame tower. That being said, Compass uses TMC2209 stepper drivers, so auto-homing is theoretically possible - just not yet implemented.

@Ricahrd_M

And what’s Z axis height/limit of movement?

There is 35mm of Z travel.

@Ricahrd_M

Sometimes, I enter 2 inches as the machining value, but the actual machining is 2.01 inches. In this case, Mach3 adjusts the motor speed. Is there a function for this?

I’m not sure exactly what you’re referring to, but the answer is likely no—there is no function for this.

@Ricahrd_M

To use in Mach3 on Aspire CAM, save as a *.txt file and read the *.txt file in Mach3. What file format does Compass CNC read?

The Compass CNC takes a gcode file format.