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Author Topic: CSS in spindle without feedback  (Read 2944 times)

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CSS in spindle without feedback
« on: September 17, 2008, 06:23:11 AM »
This is probably a question to lathe users.
Hello. I am finishing a lathe where I do not have spindle feedback, by my option. The spindle works fine at the desired speed, it is not so important.
I know the speed of the spindle based on the frequency that the inverter is outputing to the AC motor. Until this no problem. I probably have +-100 rpm but that is ok for my work.

The problem is that I need CSS. For what I have read, it is necessat to have the spindle feedback.

If I consider that the real speed is equal to the spindle speed set up by mach, CSS should work.
There is any way arround this one ?

Thank you
Re: CSS in spindle without feedback
« Reply #1 on: September 17, 2008, 08:00:10 AM »
Looks like the CSS function would just monitor OEM DRO 202 instead of 39 but I wouldn't know where or how to change it.
Would be a neat option though.
RC
Re: CSS in spindle without feedback
« Reply #2 on: September 17, 2008, 08:32:43 AM »
In fact there is an option in the ports&pins -> spindle setup -> special funtions

that have: Use spindle feedback in sync modes

If it is unchecked, it should do exacly what I want, but it does not work, still expects the feedback.
Probably this is not implemented ?
Anyone ?
Re: CSS in spindle without feedback
« Reply #3 on: September 17, 2008, 12:22:21 PM »
OK, dumb question:  What is CSS??
Regards,
Ray L.
Re: CSS in spindle without feedback
« Reply #4 on: September 17, 2008, 12:43:17 PM »
Constant Surface Speed    G96