On Tue, 1 Mar 2022, Peter Hodgson wrote:
Date: Tue, 1 Mar 2022 22:56:08 +0000
From: Peter Hodgson <peterjohnhodg...@gmail.com>
Reply-To: phodg...@uk22.net,
"Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
To: "'Enhanced Machine Controller (EMC)'" <emc-users@lists.sourceforge.net>
Subject: [Emc-users] Is there a better way - G76 for plain bearing lubricating
grooves
I've offered to make some bronze bearings for a vintage British motorbike
club.
The bearings have some helical oil grooves on one half of the inner diameter.
I thought I could do this with G76 having the pitch twice the length of the
bush.
G0 X15. Z10.
G76 P42.0 Z-25. I0.88 J0.3 K1.0 Q29.5 H1 L0 R1.5
The problem is that the spindle, run via a VFD needs to turn at only 50 RPM
to be able to have enough velocity on the Z stepper to achieve the correct
pitch and the spindle doesn't seem to be stable enough or have enough torque
at those revs to give a cosistent cut.
Does anybody have any ideas how I can check or make the G76 more stable at
low revs?
Thanks,
Pete
More encoder resolution?
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Peter Wallace
Mesa Electronics
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