Rigid tapping- first real one!

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Re: Rigid tapping- first real one!

Postby Battwell » Fri Aug 10, 2018 5:25 pm

i asked on machinist group yesterday. the figures i quoted were maximum recommended speeds for m6 size tap ( a few of the guys showed book figures for top quality taps they use)
show me some real life figures or succesful video- and il try it :-)
Uc300eth on router and mill
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Re: Rigid tapping- first real one!

Postby Vmax549 » Fri Aug 10, 2018 6:33 pm

That is easy enough to do. Here is a tap recomendation RPM chart for Balax taps and is TYPICAL for most high performance taps. Note most of these are starting points and teh speeds can go up in production senarios and high performance taps and high % coolant/lubes specific for teh application material.
Attachments
TapSpeeds.jpg
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Re: Rigid tapping- first real one!

Postby Battwell » Fri Aug 10, 2018 8:30 pm

Uc300eth on router and mill
If they say it can't be done- I find a way!
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Re: Rigid tapping- first real one!

Postby Battwell » Fri Aug 10, 2018 10:23 pm

At 1200 rpm I had to raise the start height to 5mm above work
I think that’s fast enough for an old mini mill :-)
https://youtu.be/mhANVN6tvCI
Uc300eth on router and mill
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Re: Rigid tapping- first real one!

Postby ger21 » Fri Aug 10, 2018 10:50 pm

Compare that to your first video, lol. It's at least 100 times faster. :lol:
Gerry
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Re: Rigid tapping- first real one!

Postby Battwell » Fri Aug 10, 2018 11:27 pm

Yup- I was amazed the tap took it!
Never worked with metals- I'm a wood guy!
Wouldn't even have risked my machine trying this with Mach.
Uccnc - winner!
Videos on utube. I'm sure cncdrive will get a few more sales from them :-)
Uc300eth on router and mill
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Re: Rigid tapping- first real one!

Postby Vmax549 » Sat Aug 11, 2018 12:36 pm

Good Job Battwell, ;)

(;-) TP
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Re: Rigid tapping- first real one!

Postby Vmax549 » Sat Aug 11, 2018 12:43 pm

IF you ever need to do precision blind tapping you can also run teh Spindle as C axis and program for precise depth control as well. As you have noticed with Semi Rigid tapping at high speed the depth control can be tricky.

Is it possible with your spindle setup to change the acceleration values ??


(;-) TP
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Re: Rigid tapping- first real one!

Postby Vmax549 » Sat Aug 11, 2018 1:11 pm

Perhaps now you can talk Balazs into incorporating teh Accel values of teh spindle into teh spindle sync so you could have true rigid tapping just like teh big boys.That way Z would stop exactly where it is suppose to stop. It should not be that hard to do.

Just a thought, (;-)TP
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Re: Rigid tapping- first real one!

Postby Vmax549 » Sat Aug 11, 2018 1:17 pm

Just a side note but with tapping you are limited in RPM mostly by the ability of teh coolant/lube to dissapate heat from teh tap and material. Once that breaks down you get chip welding and at that point the game is over and you have the upper limit for rpm.

Also basically the same with drilling ;) . Most Hobbiest spend way to much time peck tapping when they really do not not need to. IF you proper match up feeds and speeds then thru drilling is done without problems in a single pass.

A decent feed and speed routine (Wizard) for drilling and tapping would be a great benifit for UCCNC users. :idea:

Just a thought, (;-) TP
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