LinuxCNC Support Forum :: Topic: non rigid tapping (1/1)

clkeck1 OFFLINE Expert Boarder Posts: 91 Karma: 2	My mill doesn't have a spindle encoder so i got a floating tap holder so i don't have to manually tap all the holes. I set everything up tonight but when i went to write the program it looks like EMC doesn't support this. Am i missing something? Thanks Cory
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Re:non rigid tapping 15 Aug 2012 21:13 #23280

cmorley OFFLINE Moderator Posts: 1486 Thank you received: 40 Karma: 89	hmm not that I have done this but isn't a case of start the spindle, feed at the pitch rate, stop the spindle, reverse the spindle feed out at the pitch rate? probably with some dell times to wait for the spindle to stop etc.
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Re:non rigid tapping 15 Aug 2012 23:12 #23282

mhaberler
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Chris,

I got interested in that and had a long discussion on floating tap with Rob Harpham and some with Cradek on the issue.

I did an implementation of G84.1/G74.1 and the status is here: git.mah.priv.at/gitweb/emc2-dev.git/shortlog/refs/heads/g84-dev

I never integrated it into master because it does a bad sales job on my remapping work.. everything in it can be done with a new remapped G code except for this:

we agreed that on retract it is not a good idea to wait for the spindle-at-speed signal before beginning the retract move. So I adapted the SPINDLE_ON canon/nml message to carry an optional wait_for_atspeed flag, which defaults to true, and motion support to honour that.

I can surrect that patch and integrate it into master, if you drum up some support on the dev list.

- Michael

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Re:non rigid tapping 16 Aug 2012 02:55 #23283

cncbasher OFFLINE Moderator Posts: 679 Thank you received: 30 Karma: 53	i'd be interested in this Micheal .. Dave
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Re:non rigid tapping 16 Aug 2012 05:15 #23290

mhaberler
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clkeck1 wrote:

My mill doesn't have a spindle encoder so i got a floating tap holder so i don't have to manually tap all the holes.

I set everything up tonight but when i went to write the program it looks like EMC doesn't support this. Am i missing something?

Thanks
Cory

Cory,

you are not missing anything.

I suggest you add a feature request here: sourceforge.net/tracker/?group_id=6744&atid=356744

which will give me an excellent excuse to merge the relevant parts of the branch I mentioned below