Unable to cut correct thread with G76
17 Dec 2017 15:16 #103217
by andypugh
Out of interest, what is your acceleration setting for the Z-axis (and the max velocity).
The thing is that for most people threading works perfectly, so I am wondering what is different about your setup.
Replied by andypugh on topic Unable to cut correct thread with G76
I was wondering if, perhaps, trying to synch to the spindle is causing more-than-usual accceleration.It is a stepper so it is possible I am losing steps, but why would I only lose steps when using G76.
Out of interest, what is your acceleration setting for the Z-axis (and the max velocity).
The thing is that for most people threading works perfectly, so I am wondering what is different about your setup.
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17 Dec 2017 15:26 - 17 Dec 2017 15:27 #103218
by Patrik T
Replied by Patrik T on topic Unable to cut correct thread with G76
Yeah, that was what we concluded the last time we discussed this, that the fast variations of my light weight spindle meant the z-axis acceleration can not keep up. I accept that that is the cause of my problem. Therefore I expect to not have the same problem on the lathe I am building now. Still, the same acceleration settings work with the other algorithm.
So, to cadcam, I kind of resolved the issue by accepting the cause to be as described above.
So, to cadcam, I kind of resolved the issue by accepting the cause to be as described above.
Last edit: 17 Dec 2017 15:27 by Patrik T.
The following user(s) said Thank You: cadcam
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