Centroid Community CNC Support Forum

Thanks for that. I have written that in but still no control of the axis. I have put an M200 at the end of M51 macro to ensure it is exiting the loop and finishing and it is closing out of the macro fine. I know it has to be something simple but I cant figure it. I have tried P35=3 (same as C axis) and P35=5. It doesn't seem to change anything other than on 3, I cant set the two seperate encoder/step counts.

I still get the "tracking" behaviour when I set the C axis encoder to the same as the spindle so I know the acorn can control the motor, it just wont for some reason. Is there a way to "force" the axis open regardless of e-stops or other settings? I'd just be happy to see it move at the minute

For testing just out comment " M101 /70014 ;Wait for Zero Speed " in M51

How is your C-axis driven, do you have pictures?

Uwe

Thanks again for the help. I have comented out the M101 line again and still no avail. I dont understand why there is a call for M51 inside the M51 function but if it is not in there I get an error of "no axis to unwind" when it runs the M151.

I have the closed loop stepper set up very similar to yours. I don't have any homing switches for the axis yet, I will set them up when I get movement. I am driving all my signals from the DB25 connector (as well as both other axis) and I have triple checked the pin mapping and dont believe the issue is mechanical/electrical as the DRO for C will not increment at all. The M68/M88 commands are engaging/disengaging the clutch correctly however I normally comment them out for testing although I have tried both ways. Any ideas?

A further development, I changed P93=1 and I can control the axis both by jogging and with code. I was able to roughly calibrate the stepper to the spindle encoder via a manual axis DRO. I still have no functionality of the C if I declare the axis as C in the parameters. I am happy to live with this however it would be nice to have the C axis index options in intercon rather than hand coding. I'd rather not have to go to CAD/CAM for this as most my work is keyways or gear teeth. Basic indexing is all I need for the most part. I am also intimidated by CAM software like fusion as I have no idea how to use the CAM side of things, let alone export it to CNC12 and not have it crash the machine costing me more tooling

You must have P93=145 to have C-axis in Intercon.

C-Axis will appear in the DRO only after MDI M51 with this setting

Uwe

Yes, I have tried 145. Anytime I designate the C axis in P93, the C axis DRO appears and disapears as it should with m50 and m51 but I loose all control of the motor. I am unable to jog or move with gcode and the DRO will not increment at all. If I set P93 to 0 or 1, I can control the axis perfectly with jog or code. I don't need the m51/m50 commands other than to control the clutch. The only issue is that I have no C options in intercon. It feels like the M51 is not enabling function of the motor when it turns it on.

I will benchtest this with my spare Acorn Board.

Uwe

I will upload the latest report as soon as I can. Thanks heaps for your help on this Uwe.

A glitch I have found with this beta version is the manual axis I have set up for my spindle. It will randomly display ****.**** and shortly after CNC12 closes out without warning. No big deal as once I have the C axis working I will no longer need the manual DRO but it has been handy in the past. I had no issue with previous version.

I have attached the latest report. I am not sure what the M51 code is written as I have tried many different edits in an effort to control the drive.

I need your reduction ratio from the C-Axis drive, to make a setup for your lathe pls.

Uwe