how to connect to teknik servo drives

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26 Oct 2015 01:47 #64257 by kevinoue
how to connect to teknik servo drives was created by kevinoue
Hello, I have a custom CNC router built in the late 90's It has Teknik SST-1500-XLW servo drives, It currently uses WinCnc for the controller software, and some custom breakout board. but I would like to take advantage of the benefits Linux has to offer. I'm going to upgrade the PC and need to know what is the best way to interface with the servo drives. I contacted WinCNC and they use a PCI-7200 card with daughterboards. Not really sure what that is for, as I've seen CNC setups run from the parallel port. Can someone please explain?

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26 Oct 2015 02:21 #64259 by PCW
Replied by PCW on topic how to connect to teknik servo drives
A quick google search shows that those drives support step and direction and analog velocity mode
Step/Dir will work with just a parallel port (though there may be maximum speed limitations)

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26 Oct 2015 03:29 #64262 by kevinoue
Replied by kevinoue on topic how to connect to teknik servo drives
thanks

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26 Oct 2015 03:37 #64265 by jmelson
Replied by jmelson on topic how to connect to teknik servo drives
Generally these higher-end drives export the native servo encoder resolution as the step resolution, and that is often quite high. So, the typical step rates available from a parallel port via software step generation will be very limited. I suspect a hardware step generator would be needed. One possible choice is the Pico Systems Universal Stepper Controller, which can conservatively output up to 300,000 steps/second on all axes simultaneously. It supports up to 4 axes, and has 16 digital inputs and place to mount up to 8 solid state relays for digital outputs. You can run open-loop, and just send steps to the drive, or you can run closed-loop, and have the drive send position back to the controller.

Jon (disclaimer: I am Pico Systems)

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26 Oct 2015 08:15 #64272 by Todd Zuercher
Replied by Todd Zuercher on topic how to connect to teknik servo drives
The Wincnc control set up uses the PCi-7200 card along with an attached proprietary daughter card to generate hardware step generation. A lot faster than you'll ever get from a parallel port. It is all uses proprietary software and drivers, I don't think you'll ever be able to make that card setup work with Linuxcnc. On the plus side if you decide to try software stepping, the Teknik drives can do software gear ratios so you can pretty much make your step to distance traveled what ever suits your fancy. Personally I would suggest some form of hardware stepgen(something from Mesa or Pico???).

I am running a machine that was once runing Wincnc software with Linuxcnc and a Mesa 5i25/7i85S combo. It has Tekniks 1500-ACX servo drives.

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26 Oct 2015 21:08 #64297 by andypugh
Replied by andypugh on topic how to connect to teknik servo drives

I contacted WinCNC and they use a PCI-7200 card with daughterboards. Not really sure what that is for, as I've seen CNC setups run from the parallel port. Can someone please explain?


It might be possible to write a LinuxCNC driver for the PCI 7200.
Actually, it definitely is possible to write the driver, but it might not be worth the trouble.

It is probably worth looking through the card manual to see if it does hardware step generation or whether it is just a simple digital IO card:
www.adlinktech.com/PD/web/PD_detail.php?pid=18

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