What would you guy's recommend for encoders?

More
25 Oct 2018 22:38 #119414 by Catch22
I have an cnc knee mill with sem servo motors and just bought some AMC servo drives to replace the original ones. The mill has tachs on the motors and A10 linear scales, would you guys recommend using the linear encoders or should I ad an encoder on each motor instead, just want what be best.
Any input on this would be greatly appreciated.
Thanks Mike

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 11:49 #119437 by andypugh
if the drives support tachometer input and velocity mode then I would use that and close the position loop with the linear scales. In theory that gives the best accuracy.

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 14:06 #119446 by Catch22
Yes they do support tachometer input, thank you for your help.

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 14:35 #119450 by OT-CNC
I would keep the linear encoders on the X and Y. Is this for the anilam project you posted on before?
If so, you need to understand that the ball screws on the older machines were not super high precision and positional accuracy was achieved with the linear encoders. I was reminded of that by an Anilam repair specialist.
If you have rotary encoder on the Z ball screw, I would replace that with a US-digital product. I used one that happen to be a direct fit with higher resolution. I can look for the part number if you're interested.
To get it going, I would try to use the boards in the machine as previously suggested if they still work and read in the encoder to a 7i77 etc.

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 14:42 - 26 Oct 2018 14:43 #119451 by Catch22
Yes it is for the anilam crusader m control. I don't know if the old drives work, and I have purchased new AMC drives that I would like to use.And yes to the z axis encoder info.
Thanks for your help.
Thanks Mike
Last edit: 26 Oct 2018 14:43 by Catch22.

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 15:34 #119454 by OT-CNC
The US Digital part number I used for the encoder: E5-1000-250-IE-D-D-G-B (1000 cpr with 1/4 bore)
Cable: CA-FC10-SH-NC-15 (Connector one end)

This is on my mill:




Attachments:

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 16:34 #119460 by Catch22
Awesome, and thanks.

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 17:59 - 26 Oct 2018 18:22 #119473 by Catch22
Can anyone tell me what this is in the drawing that's circled.
Thanks Mike
Attachments:
Last edit: 26 Oct 2018 18:22 by Catch22.

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 18:28 #119474 by rodw
That and the switch drawn beside it are a relay. You've circled the relay coil (low voltage side)

Please Log in or Create an account to join the conversation.

More
26 Oct 2018 21:18 - 27 Oct 2018 01:17 #119485 by Catch22
OK thank you, but is it really necessary to have a relay there, I wasn't planning on putting one in.
Thanks Mike
Last edit: 27 Oct 2018 01:17 by Catch22.

Please Log in or Create an account to join the conversation.

Moderators: piasdom
Time to create page: 0.147 seconds
Powered by Kunena Forum