Servo drivers and spindle

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21 Apr 2020 14:09 #164963 by PCW
Replied by PCW on topic Servo drivers and spindle
If the drive supports step/dir mode (and you have a free step/dir output)
it seems like that would be the simplest

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21 Apr 2020 19:07 - 21 Apr 2020 19:26 #164994 by Joco
Replied by Joco on topic Servo drivers and spindle
Thanks PCW. Yes it does have step/dir mode as well as the other 2 modes (Up/Down and the Quadsomething one).

I’m okay taking on a little complexity if it means Im going to get a better performing outcome. Part of the challenge is figuring out which the potential control paths will give the better performance on the servo motor in driving a spindle.

Appreciate any advice on that front or pointing me the info that can spell out the pros/cons of the different control paths available (step/dir, speed, torque).

Edit: i guess question is will step/dir give me the best performance or should I accept some complexity and pursue one of the other control paths as it will deliver better performance for the motor driving a spindle.

Cheers, James.
Last edit: 21 Apr 2020 19:26 by Joco.

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22 Apr 2020 00:25 #165026 by PCW
Replied by PCW on topic Servo drivers and spindle
I would think the performance is mainly determined by the drive, not the interface method, so if it were my choice I would just use step/dir

On possible advantage of voltage interface is that you could run in torque
mode which though fussier to tune, would allow you to monitor the applied torque.
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22 Apr 2020 06:18 - 22 Apr 2020 06:29 #165047 by Joco
Replied by Joco on topic Servo drivers and spindle
Thanks. Will run with the step/dir type model and see how things go.

I assume I will need to find the correct step on-time, Dir-Hold etc values? In the same way I would when setting up a real stepper driver? They should exist in the driver manual somewhere? Or is it a bit different when dealing with servos?
Last edit: 22 Apr 2020 06:29 by Joco.

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22 Apr 2020 12:11 #165086 by tommylight

I assume I will need to find the correct step on-time, Dir-Hold etc values? In the same way I would when setting up a real stepper driver? They should exist in the driver manual somewhere? Or is it a bit different when dealing with servos?

The default settings should do just fine, but if they do not, it is very easy to change them in hal or ini.
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