Durapulse VFD and ATC


LOGIN below to POST your questions and comments on AjaxCNC products.

Moderator: cnckeith

Post Reply
Posts: 15
Joined: Sun Dec 08, 2013 1:42 am
Allin1DC CNC Controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: No
CNC11: Yes
CPU10 or CPU7: No
System Serial Number: none

Durapulse VFD and ATC

Post by Marik » Sat Feb 10, 2018 6:28 pm

We have here All in One DC on a mill and Durapulse GS3 VFD and will also install an encoder on the spindle. We would like to add to the mill ATC. How the spindle positioning would work?

Thanks, Mark

Posts: 605
Joined: Wed Mar 03, 2010 4:23 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
CNC11: Yes
CPU10 or CPU7: Yes
System Serial Number: none

Re: Durapulse VFD and ATC

Post by cnckeith » Sun Feb 11, 2018 1:58 pm

hello. atc spindle tool change orientation is typically done with an add on board to the inverter that connects to the spindle encoder

Posts: 355
Joined: Wed Mar 24, 2010 5:48 pm

Re: Durapulse VFD and ATC

Post by cncsnw » Sun Feb 11, 2018 2:29 pm

The Durapulse/GS3 drives are not capable of closed-loop position control.

There is an encoder feedback option card (GS3-FB) available, but its only function is improved speed control.

If your tool changer requires oriented spindle stop, then you need one of:
1) A mechanical shot-pin-and-slot system
2) A vector drive such as Yaskawa A1000, Delta C2000, Mitsubishi A800, or Hitachi SJ700, with matching encoder feedback add-in card
3) Possibly, a combination of encoder feedback to the GS3, combined with fast-stage logic in the Centroid PLC that runs a PID loop for position control.

The third option takes a lot of work, and may never work very well, if the drive is not responsive enough. I have done it before with high-performance vector drives (Yaskawa 626-series) that happened to lack orient capability.

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests