Board selection for analog servo drives

  • Trav328
  • Trav328's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
11 Aug 2023 02:25 #277588 by Trav328
Hi , I just picked up a 1996 standard modern lathe with a bad centurion controller , the lathe uses parker MPA analog drives and servos.

A  bit in the selection of boards , I require analog control +/- 10v for the mpa drives for axis and spindle , the drives require a sinking control to enable/reset but the rest of the machine runs on a 24v system for all limits

the drives have resolvers but output a simulated encoder signal for linuxcnc , the spindle (also a mpa drive) has a heidenhan encoder as well as a resolver.

I will also need to control a pragati tool changer that has a small 3 phase motor with a absolute encoder (i havent tore into this much yet)

thankful for any help in selection you guys/gals can offer , happy to be back on a forum its been a few years.

I also understand that boards are in short supply , I don't have a problem waiting a couple months for the right combo.

Attached is a picture of the drive wiring diagram
 
Attachments:

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

  • Trav328
  • Trav328's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
11 Aug 2023 02:33 #277589 by Trav328
Replied by Trav328 on topic Board selection for analog servo drives
Attachments:

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

More
11 Aug 2023 03:42 #277592 by PCW
Replied by PCW on topic Board selection for analog servo drives
Mesa should have 7I97T cards in 6 weeks (basically the same as a 7I97 but with a different FPGA)

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

  • Trav328
  • Trav328's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
11 Aug 2023 04:19 #277596 by Trav328
Replied by Trav328 on topic Board selection for analog servo drives
Thanks for the fast reply , that looks like the ticket , I will keep an eye out for them to come avilable

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

More
11 Aug 2023 14:39 #277643 by jmelson
Replied by jmelson on topic Board selection for analog servo drives
One option is the Pico Systems PPMC, a set of boards with encoder counter, D/A converter and digital I/O. I did a retrofit on a similar machine with MTS servos, with resolvers where the drives make a quadrature output. It worked quite well.
(full disclosure, I am Pico Systems.)
See: pico-systems.com/osc2.5/catalog/index.php?cPath=1
for more info.
Jon

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

  • Trav328
  • Trav328's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
11 Aug 2023 14:49 #277644 by Trav328
Replied by Trav328 on topic Board selection for analog servo drives
Thanks,  I will look into the pico aswell

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

More
13 Aug 2023 15:13 #277835 by msrdiesel
Replied by msrdiesel on topic Board selection for analog servo drives
"I will also need to control a pragati tool changer that has a small 3 phase motor with a absolute encoder (i havent tore into this much yet)"

I have used 3 phase solid state relays for this purpose, you can use a digital output and hold it "HIGH" to perform the rotation until whatever sensor is triggered.

They tend to be well over-rated so buy one bigger than you need if you go this route. I have used these successfully in upgrading a Tos Hostivar OD grinder to touch screen control.

Here is a link to the relay: www.amazon.com/Baomain-Phase-JGX-3340A-4...ay%2Caps%2C92&sr=8-3

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

More
13 Aug 2023 15:23 #277836 by COFHAL
Replied by COFHAL on topic Board selection for analog servo drives
What servo motor are you using?

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

More
13 Aug 2023 16:05 - 13 Aug 2023 16:07 #277838 by COFHAL
Replied by COFHAL on topic Board selection for analog servo drives
I think it is the only solution to control several analog servos with resolvers
, I am controlling a single Parker analog servo with a 7i33TA and a 7i96 with a special firmare that replaces step 4 with PWM and dir, thanks PCW. Since those MPA servos have a simulated incremental encoder output with a resolution of 1024, I connected it to the encoder input of the 7i96 and with that I have feedback of the servo motor position.
Last edit: 13 Aug 2023 16:07 by COFHAL.

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

  • Trav328
  • Trav328's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
14 Aug 2023 22:27 #278007 by Trav328
Replied by Trav328 on topic Board selection for analog servo drives
Thanks for the input , "msrdiesel" i watched the videos of your fadal and that is the inspiration for my front panel , very nice  and clean looking job, 
i have used those solid state relays for other projects and they work good , my powder coating oven has 3 of the single phase ones in it.

  im only going to be running single phase to the machine as its all i have and the amps support it , i might look into swapping the tool change motor for something else or use a vfd/dps to run it , its only small. 

"cofhal" , i dont know what the servos are they are burried and not pleasant to get to , the drives are 1996 MTS (now parker hannifin) MPA-06 for the axis , and MPA-50 for the spindle , running in single phase mode , the drives seem very user friendly and i have found quite a few manuals online for them , the spindle has 4 winding selections that equal 3 "ranges" for now its just going to stay locked in low but its setup to be controlled by 2 relays. the spindle also has a dedicated heidenhan encoder . i will be using the simulated encoder for the axis.
The following user(s) said Thank You: msrdiesel

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

Moderators: PCWjmelson
Time to create page: 0.127 seconds
Powered by Kunena Forum