Centroid Community CNC Support Forum

cncsnw wrote: ↑Tue Aug 16, 2022 9:16 pm I only had time to watch the first three minutes of your video, but a couple things stand out.

Your biggest issue is probably that you are trying to cut at a feedrate of 10 inches per revolution. If you meant to use 10 inches per minute, then you need to go back to the feedrate lines and press F1 to toggle the mode from Feed/Revolution to Feed/Minute. Trying to move 10 inches per revolution, at a significant spindle RPM, is going to result in a feed request (pulse rate) that your drive cannot possibly keep up with. That is why it is losing position with each pass.

Second, you are asking the control to run your spindle at whatever RPM it takes to maintain 2500 surface feet per minute (constant surface speed mode). On a 0.375" diameter, that would require about 25000 RPM. Of course, the control cannot, and will not try, to run the spindle faster than the maximum RPM you have it configured for. The unreasonable surface speed request just means your spindle will run at max RPM all the time.

Third, you have set the end of the stock to be Z0 (per standard practice), but you have then written a program to turn the diameter down between Z0 and Z+0.500. To do anything useful, you will want to make the Ending Z value negative. That error would have been evident on the F8/Graph screen, which you should always check before running a program.

BillB wrote: ↑Thu Aug 18, 2022 12:38 am ...

As I work with the machine and get to know the limits of its mechanical abilities how do I figure out what it’s limits are regrading running smooth VS missing steps?

tblough wrote: ↑Thu Aug 18, 2022 8:08 am Your DRO would have been a big clue you were loosing steps. When it was going "backwards". You would have noted the Z DRO value always going back to your starting point (near 0) instead of getting larger each time as it would have if you had your Z direction configured wrong.

If you would have looked at your machine coordinates when it was overrunning your home switch, you would have noticed it was a large value instead of near 0. That would have also told you you had lost steps.

suntravel wrote: ↑Thu Aug 18, 2022 4:46 am

BillB wrote: ↑Thu Aug 18, 2022 12:38 am ...

As I work with the machine and get to know the limits of its mechanical abilities how do I figure out what it’s limits are regrading running smooth VS missing steps?

If you have the stepper from the first post here, did you connect ALM?

If yes and this is connected and configured ok. You will get a drive error if losing steps.

Uwe

suntravel wrote: ↑Thu Aug 18, 2022 1:27 pm here is the wiring with ALM:

https://www.centroidcnc.com/dealersuppo ... 032.r2.pdf

ALM is connected to an Input set to Drive OK in the Wizard

You can set up the drivers with the software how many lost steps will trigger ALM (400 or less is a ok value, to low will ALM on fast acceleration)

Reaction time for ALM is by default 1000 ms in CNC12, I set this on my machines to 100 or 50 ms.

Uwe

BillB wrote: ↑Thu Aug 18, 2022 4:50 pm

suntravel wrote: ↑Thu Aug 18, 2022 1:27 pm here is the wiring with ALM:

https://www.centroidcnc.com/dealersuppo ... 032.r2.pdf

ALM is connected to an Input set to Drive OK in the Wizard

You can set up the drivers with the software how many lost steps will trigger ALM (400 or less is a ok value, to low will ALM on fast acceleration)

Reaction time for ALM is by default 1000 ms in CNC12, I set this on my machines to 100 or 50 ms.

Uwe

Now that I see the way it's wired to enable the circuit I think my systems are wired with this, but I'm not getting any indication of issues in the control. Let me see if I can get Martys input and see if this is how he wired the Emco lathe.

What does ALM stand for "Alarm" ??

martyscncgarage wrote: ↑Thu Aug 18, 2022 5:31 pm

BillB wrote: ↑Thu Aug 18, 2022 4:50 pm

suntravel wrote: ↑Thu Aug 18, 2022 1:27 pm here is the wiring with ALM:

https://www.centroidcnc.com/dealersuppo ... 032.r2.pdf

ALM is connected to an Input set to Drive OK in the Wizard

You can set up the drivers with the software how many lost steps will trigger ALM (400 or less is a ok value, to low will ALM on fast acceleration)

Reaction time for ALM is by default 1000 ms in CNC12, I set this on my machines to 100 or 50 ms.

Uwe

Now that I see the way it's wired to enable the circuit I think my systems are wired with this, but I'm not getting any indication of issues in the control. Let me see if I can get Martys input and see if this is how he wired the Emco lathe.

What does ALM stand for "Alarm" ??

YES ALM=Alarm
Did you program an input DRIVEOK?
Post a fresh report