21439Re: [turbocnc] coordinates drift !
- Nov 25, 2013Try turning off backlash compensation. I found this to be a problem
using home switches before I had zero backlash nuts on the axis.
At 08:49 PM 11/25/2013, you wrote:
>Thank you all for the very good suggestions.
>Verified mechanical tightness of the step-motor shafts and it is ok
>btw, the table moves quite light so the step motors make very little
>even so it is solid tight.
>long cycle of G1's make no errors
>same part but using large doses of G2 G3 to round corners is a disaster !
>To be done:
> - testing another PC. (I see what you mean... I may have
> noises on this
>PC LPT )
> - testing CNCpro
> - testing Mach3 ?! (but I rather prefer to stay without mouse etc...)
>I see the movements of the G2 and G3 quite odd !!!
>It slows down immensely despite having the same feedrate as a G1 move.
>I would say an arc at F200 goes at 1/10 of the speed of a linear move
>even if the arc is shallow like a straight line.
>Is this normal ??? Or am I having an issue here ?
>Also apparently if the arc makes one axis move positive and then negative
>I don't see it applying the backlash compensation when it inverts motion
>inside the arc... but this could be my eyes ;-)
>btw, machine is a 486DX2 66MHz... maybe it is a too slow PC !!!
>but it has been excellent so far ! :-(
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