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Author Topic: Rigid tapping with IP-A  (Read 24070 times)

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Offline Hood

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Re: Rigid tapping with IP-A
« Reply #10 on: May 17, 2013, 11:30:36 AM »
Thanks Robert :)

Hood

Offline Dan13

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Re: Rigid tapping with IP-A
« Reply #11 on: May 17, 2013, 11:35:39 AM »
The threading in the simulation looks perfect! Engages incredibly quickly and retracts fast as well. Fingers crossed for your next session with Brian :)

Dan

Offline Hood

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Re: Rigid tapping with IP-A
« Reply #12 on: May 17, 2013, 11:41:05 AM »
Yes it does, was wanting to actually cut some threads today and to slow and speed the spindle with the override but the spindle drive decided not to allow that ;D


Regarding your other question, yes the Z is synchronised with the spindle encoder but not sure if it would work by rotating manually, may well do but no way for me to test on the Chiron.

Hood

Offline Dan13

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Re: Rigid tapping with IP-A
« Reply #13 on: May 17, 2013, 11:42:17 AM »
Thanks, Hood.

Dan

Offline BR549

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Re: Rigid tapping with IP-A
« Reply #14 on: May 17, 2013, 11:50:53 AM »
Hood in slow accel mode how well does it control Z depth for blind hole tapping? THAT will be the true test.

GOOD job so far (;-) TP

Offline Hood

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Re: Rigid tapping with IP-A
« Reply #15 on: May 17, 2013, 12:13:30 PM »
Terry,
         I will be able to tell you tomorrow with 100% certainty but I am sure it doesnt go any deeper. I can easily check tomorrow as the axis DROs are updated from the axis encoders so I will be able to see if they do go to the depth specified in the code.

I believe even with a VFD spindle control is closed loop (assuming you have an encoder on it) I have never tested it as I dont have a VFD spindle on any of my machines, but there is PID tuning for the 0-10v analogue out for VFD spindles.

Hood

Hood
Re: Rigid tapping with IP-A
« Reply #16 on: May 17, 2013, 09:36:37 PM »
Hood,

That's really impressive. Somewhere very deep down my to-do list (read wish-list) is to try rigid tapping with Arduino. My machine is already equipped with VFD and a differential encoder on the spindle motor. After seeing your posts it has moved up many notches on the to-do list. Let's see when I gather enough courage to give it a try :).

Zafar

Offline Hood

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Re: Rigid tapping with IP-A
« Reply #17 on: May 18, 2013, 10:03:46 AM »
Be sure to keep us updated Zafar :)
Hood

Offline Hood

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Re: Rigid tapping with IP-A
« Reply #18 on: May 18, 2013, 10:15:24 AM »
Hi Terry,
 couple of vids for you, first is showing an exceptionally slow accel of spindle (20 seconds to get to full rpm, normally 0.8 set)
It shows that the depth is observed exactly when rigid tapping.
http://youtu.be/A29bYyWzrlo

Second vid is same accel but this time I have done a peck tap, 5mm then 10mm then 15 then finally 20mm. Just did it in Alu that is 1/4" thick but I am sure you will agree if it wasnt pecking exactly right the threads would be stripped :)
http://youtu.be/UbNizRlRT1g

I have to say I think the IP-A is the mutts nuts :)


Hood

Offline BR549

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Re: Rigid tapping with IP-A
« Reply #19 on: May 18, 2013, 11:29:33 AM »
Thanks HOOD, You answered all my questions (;-).

I agree the unit appears to handle Rigid tapping very well.

(;-) TP