[Hythos]

Good afternoon gang -

I've refitted my Bridgeport with a Z-feed off of an identical control. I have glass scales on X & Y, with an encoder running Z. All is Anliam OEM, and all hardware responds to the control.

Since I don't have the destruction manual for the control, I've had to learn it on my own...
PCB-502 DIP F6:
1 on = Z-axis NC (?)
2 on only = .0001" resolution
3 on only = .0002" resolution
1 on 3 off = .0005" resolution

With #1 and 3, the machine will operate 2-axis perfectly, however Z will read at approximately 4:1 (meaning movement over 4.5" of travel reads 1.2").
When setting the resolution to .0005", Z is closer to 5:4, but not accurately 1:1.
PCB-502 is good - I've tested two boards with the same results. (Possible issue may still exist with the Servo-drive interface board - PCB-501/3(?)).


I've read Anilam encoders operate at 128 lines per inch. I believe the issue may be corrected through some settings / calibration; Or, I could remove the encoder and re-connect the glass-scale to my Z-feed and be done with it.

I'm open to suggestions..

[Galane]

Old thread necro, but the Z encoder on a mill I took a Crusader M setup off has a BEI 127 ppr with index encoder. With a 5 tpi screw that gives .01mm resolution, which is very close to the .004" linear scale resolution. BEI doesn't make 127 ppr encoders now.

If the Z encoder has an index pulse, could be throwing it off if the system isn't configured for it.

[Hythos]

Hi Galane, and thanks!
Way back then, I had removed the rotary encoder and connected the Z-linear scale that came with the 3-axis set. I had to modify the Anilam bracket, but that was easy enough. It's worked quite well for 100's of hours, but just yesterday, I noticed a repeatability error on Z, between a couple tenths to ~.015";
While it's not related to the original issue I had, it's a topic for another thread I'll look into BEI just in case. Thanks!

[Galane]

Might just need to clean the Z scale, especially if it's an optical type.