Anyone out there peck tapping??

[Scott Garrison@Weiler Engineering]

Can anyone give me an example where peck tapping is helpful. Also, how about dwelling at the bottom of a tapped hole?

[mold100]

Once a while ago, osg tap, in 60rc D-2. Worked alright after we got the speed correct. it always pause briefly to reverse so I dont ever think I seen a dwell in a program.

[MLS]

We use peck tapping on some of our Mazaks usually on deeper holes.

 

Prior to peck tapping on deeper holes, we would just start the tap and finish them by hand as to avoid breaking the taps. It allows the chips to break and evacuate out of the hole to lessen the torsional load on the tap.

[crazy^millman]

Dwell I do not recommend you always want a tap moving in my opinion. Peck tapping for over 10 years easily. Great when you need in it hard materials or really gummy materials. Mazak's have this for years a lot of the newer Fanuc's now come standard with it just need to add a Q to the tapping statement.

[ToolMan184]

We use peck tapping very often. As Ron said just add the Q value on a Fanuc and wha la.

[ReDEyZZ]

We used to peck tap, but now we are thread forming everything to depth no problem. our production has gone up and tapping issues are almost obsolete. thread forming or rolling all the way.

[Scott Garrison@Weiler Engineering]

I agree with the roll forming, I worked at a job shop where we did a lot of s.s. and we roll formed everything, especially blind holes.

 

Where I'm at now does mostly S.S. but the old machines don't even have rigid tap wheras or new Kurakis all do.

 

According to the manual the dwell occurs at both the bottom of the hole and at the R-level. I assume you could put a 15 second dwell to let you blow chips out and lubricate the tap or whatnot. I can see this as a plus.

 

Thanks, my operators who aren't green by any standard were questioning the need for it.

 

Thanks for the input!

 

Scott

[Tim Johnson]

I use peck tapping when I have to but I don't like it. There is a monsterous amount of time added and I'll go out of my way to find a better tap or process before I succumb to it.

[Randy Morton @ Clem Industrial]

I found peck tapping worked well for some applications that I had. I used to work on a vertical with crap for hp. I would peck tap our bigger taps (like 1.75") that would normally stall the spindle. In this case it was a little learning where the stall point vs. depth was so I could make the programming adjustments to the tap.

[Mr. Dayshift]

I have used peck tapping when the only thing available was a hand tap. Yes, very time consuming though. I actually plan on peck tapping NPT threads tomorrow morning in some aluminum manifolds.

 

Anybody: what are the limitations to thread forming? It sounds like the best thing ever right about now.

[iowajim62]

Peck tapping on super deep threads or tough materials otherwise regular rigid tapping.

Thread milling is my preferred method for NPT because it reduces tool pressure to nothing almost. jm2c

[Guest CNC Apps Guy 1]

Threadmilling is #1 choice, Peck Tapping/Threadrolling #2 choice, Regular Tapping #3 choice.

[Post dept]

You guys want peck Q added to mplmaster tapping? We've already put it into mpmaster.

[Scott Garrison@Weiler Engineering]

Brett, yes, i saw that in the post I'm modifying for my Kuraki horizontal.

[Scott Garrison@Weiler Engineering]

Brett,

 

Seems like the post will always output a Q even if you don't want to peck tap. How do you change it to NOT outout if Q=0 ? Our Fanuc 16i-M will tap with a Q0, I just tried it so this is not critical.

 

Also, ours has a dwell as well, it will dwell at the bottom of the tap motion and at the R-level.

How do you add a dwell in a cycle?

 

Thanks,

Scott

[Post dept]

For the peck and dwell se usually do something like [if peck1$, *peck1$]....same goes for the dwell. Check out the cycles that are in there, you'll see how to do it.

[ckwhite]

I don't understand how to get the post to not output a Q when I don't want it to peck.

Fanuc control

MPSV-400 I think is my post.

Any help would be great.

[ckwhite]

FYI

I decided to created a peck tap cycle. Instead of adding peck to my rigid tap cycle. This made more since to me.

[Scott Garrison@Weiler Engineering]

ckwhite,

 

Look for the ptap$ post block and find *peck1$. Remove the asterisk in front. That forces it to output everytime. I should be just peck1$

 

Scott