cincinnati axis spindle question

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16 Feb 2013 04:22 #30152 by jlviloria
I'm working on a lathe cincinnati, which has the option of tool. My question right now is how to set the spindle to work as the C axis

is that with M19 spindle orient, but how do you place him degrees to the spindle.? example: C30, C90.

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16 Feb 2013 06:12 #30156 by emcPT
It will depend on how the spindle is controlled. What kind of motor is running the spindle?
Do you currently already use linuxcnc on that lathe?
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18 Feb 2013 21:33 #30275 by jlviloria
Thanks for your answer.


I realized I had not put any motor information.

It is a DC motor, 50HP Reliance brand, and the machine is controlled by linuxcnc.

linuxcnc.org/index.php/english/forum/30-...cinnati-milacron-12c

I hope you can help me, thank you very much again.

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19 Feb 2013 20:17 - 19 Feb 2013 20:22 #30316 by emcPT
Currently what drives the motor is in good working condition?
Can you inform what drives the motor?
If it is in good working condition maybe you still can use all the existing hardware.

Where are you located? Spain? Mexico?

Filipe
Last edit: 19 Feb 2013 20:22 by emcPT.

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19 Feb 2013 21:59 #30319 by jlviloria
Filip thanks for your answer.

The DC motor controlled by a variable speed Reliance. is in pefect condition.

The question is how to control to make it work with M19, for working with power tools.

I'm in Colombia.

thanks

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20 Feb 2013 06:31 #30338 by emcPT
I am afraid I cannot help you. I am rather new here and I am trying also to do a retrofit.
In my case I am way back than you as I do not even have a spindle running (the original spindle drive was damaged), but my machine also have live tooling.
Maybe someone will give you that info as there are members that know a lot.
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25 Feb 2013 03:51 #30535 by andypugh

I'm working on a lathe cincinnati, which has the option of tool. My question right now is how to set the spindle to work as the C axis

I think this needs to be done with a bit of cleverness in HAL.
You would basically use two different PID controllers, one for normal spindle mode, commanded by motion.spindle-speed-out (or motion.spindle-speed-out-rps) and another commanded by the motion.spindle-orient-angle pin.
You would then use a mux2 component to decide which PID output is sent to the spindle motor controller. The mux2 select would be linked to the motion.spindle-orient pin.
This gives closed-loop control of spindle speed, and closed-loop position control.
There is a component called "orient" that is intended to help. www.linuxcnc.org/docs/html/man/man9/orient.9.html but I think you still need the other components I suggested.
It is probably a good idea to disable the inactive PID controller when the other is doing the job.

I keep meaning to set this system up with my mill, but I haven't done so yet.
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26 Feb 2013 21:51 #30611 by mhaberler
there is also a matching demo configuration (sim mode):

git.linuxcnc.org/gitweb?p=linuxcnc.git;a...05d2d6eb0b7751cd07e3

- Michael
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05 Mar 2013 23:54 #30928 by jlviloria
how he would control the angle or want to make an contour on the machine, if equipped with a DC motor? not require a servomotor? or you can control a DC motor that way?

Thanks for advance

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05 Mar 2013 23:58 #30929 by andypugh

how he would control the angle or want to make an contour on the machine, if equipped with a DC motor? not require a servomotor? or you can control a DC motor that way?

If the spindle has an encoder then the motor _is_ a servo.

I am working on a sample lathe XZC config at the moment. Might have it working tonight.
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