I have not used my CNC machine for a few months. I was carving a drop tray and noticed that the spindle seemed to bog down as it went in the X- direction and curving up in the Y+ direction. It is an oval cutout 0.55" deep with a 1" diameter bowl/dish bit from Rockler. As the cutting progressed, I could hear the spindle slow down as it made the counterclockwise travel. I was cutting 0.05" per pass, which is my normal cut depth per pass. On the second to last pass the spindle stopped spinning, but the CNC kept moving.
I cleaned everything today and tried again. No luck. Even with the bit not cutting into the wood, the spindle sounded like it bogged down while making the counterclockwise motion.
Is there something wrong with the spindle? Settings? CNC motors?
I have made quite a few drop trays in this same manner with no spindle slow down or bogging down through the cuts.
Any advice will be greatly appreciated.
Thank you
David
If it’s doing it during an air cut then there could be an issue with the VFD controller or maybe a spindle bearing going bad? Call support and they can help trouble shoot the issue. Did you check the RPM display on the VFD to see if it corresponded with the bogging down?