Roger,
He tried 20 up/down cycles each at 15 IPM, 30 IPM and 60 IPM (60 cycles total). I have attached what the OP prepared showing the results. An increase of .0005" on the down stroke in the 10th cycle at 30 IPM is a bit odd, but it remained constant for the last 10 cycles. I'm not sure I would consider it a significant anomaly, since is consistent for the other 40 cycles, and it's only .0005". I'm guessing that the .0005" change had more to do with the dial indicator than with the machine. I have one that has .0005" resolution, but it's not accurate to .0005".
Do these results meet your suggestion , or do you endorse giving it another go, only doing 50 continuous cycles at a fixed velocity? Do you have a velocity recommendation? As noted, when the problem showed up, he was running Z at only 5 IPM. Maybe he should run at that speed to simulate what happened during actual production?
Gary
Hi Gary
That data says to me that it is NOT an electronics problem (as I had previously suggested).
Cheers
Roger
That's not a good test for lost steps.He tried 20 up/down cycles each at 15 IPM, 30 IPM and 60 IPM (60 cycles total).
Lost steps on the Z axis will typically happen with lots of rapid, back and forth random movements, like 3D carving.
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
[URL]http://www.g-forcecnc.com/jointcam.html[/URL]
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
No News ....This might help if, you tweek Z axis Motor
https://www.machsupport.com/wp-conte...all_Config.pdf
Page 77 of 106 pdf
or
5.5.2 Motor Tuning and Setup ..page 5-19
Good Luck,
DJ