I'm using Mach3 ***.056 and have been for some time. I'm building a Joe's EVO CNC and now I've found a new problem. I thought I had been through most of the glitches. I'm trying to make a plaque that I've made about 50 times before on my old Blacktoe CNC router.
For some unknown reason the Z axis is not cutting to the right depth when the g-code calls for a depth change. The code says to cut to 0.045 below zero but the tool (a 90 deg v-bit) barley scratches the surface of the wood. The Z DRO shows the depth change but for some reason the stepper is not moving to the right depth. I have re-calibrated the stepper so many time I've lost count. I use the auto calibrate and move Z down 4" to set the steps. When I recheck the movement of Z it is almost perfect. But this is not reflected when I try to run g-code.
Question: could this be noise in my system?
![Huh ???](https://www.machsupport.com/forum/Smileys/default/huh.gif)
Or is there a setting I'm missing?
![Huh ???](https://www.machsupport.com/forum/Smileys/default/huh.gif)
I'm using a Chinese spindle and VFD which has been the source if most of my problems because of the RF noise. I have shielded wire on the spindle but I don't think the shield is grounded very well. So tomorrow I will do a better job of grounding the shield.