Tl-1, Rigid Tap

[DEAN]

I have a TL-1 without the rigid tap option. I tap all the time with it using a rigid setup (collet or chuck) in conversational mode.
I don't see the difference with tapping using the rigid tap trial on or off.
How does the rigid tap option change things?
I have been tapping at no more than 350 RPM so maybe this isn't a high enough speed to see any difference.

[DEAN]

Come on people. Someone must be able to answer this.
Was the question not clear?

[HuFlungDung]

Good question.

On a lathe which is able to cut threads via G33, that basically is rigid tapping. Does this machine run G33 as 'standard option'?

[miljnor]

all my lathes have g33 but all of my HAAS have ridgid tapping.

you might not notice the ridgid tapping not working if the tap is big enough to take a hit on the bottom of a hole or a mis match in spindle verses tap movement.

I was ridgid tapping in a machine that it was turn off on and I didn't even notice until I switched to a 1/4-20 tap and was snaping them on a whole that was only .1 deeper that the tap had to go.

[DEAN]

Thanks for ther responses.

I have been using G84 (Tapping canned cycle), also this is the GCODE the conversational portion posts.

The machine doesn't use G33. Looking in the SL series manual I don't even see a reference to G33. G32 (Threading) is listed.

The only reference in the manual to rigid tapping in the GCODE list is G95 (Live tool rigid tapping). I don't think this applies here.

So my question still is: What does the rigid tapping option do to G84 that makes it even necessary?

Right now I do not have the option activated permanently in the control but I do have it accessable as a 200 Trial Option. I have used G84 with it on and off and I can't see a difference.

When one rigid taps on a lathe with something like a 5/16-18 or 3/8-16 what sort of spindle speed is typically used??

Thanks,
Dean

[Geof]

To answer your spindle speed question I tap at 1000 rpm up to 1/2"-13 and 9/16"-18. Regarding tapping using rigid holders when Rigid Tapping is turned off maybe the synchronization of the spindle speed and Z axis feed is so good that it is equivalent to rigid tapping. I know if you want to do Repeat Rigid Tapping for peck tapping you have to have Rigid Tapping activated and you have to also turn on a parameter for repeat rigid tapping. If you do not you get a 'multistart' thread.

[osmqc]

Here is how we thread a 5/16-18 thread on ss

N6 G99 G18 ( THREAD: OUTER THREAD1 )
T404 ( OD_UN_SW )
G97 S2730 M03
G00 G99 Z-3.7886 M08
G00 X0.4903
G76 X0.307 Z-4.75 K0.0378 I-0.005 D0.008 F0.0556
G00 X0.8875 Z-3.7886 M05
G28 U0 W0 M09
M01

[miljnor]

The G33 comand is not in any manual but it works on all of thier machines.

But I have ridgid tapping so I don't know if they would remove it from the coding or not.

On my machines you can go to the help menu on the control and get a list of commands excepted by the machine. Dont remember the exact key sequence but just play around with it and find out. (the machine that is! )

[DEAN]

Whats the syntax for G33?

[miljnor]

depnding on the year (this is for lathe! I don't use it on mills so syntax may vary)

earlier models G33 X0.0000 Z0.0000 E.000000
Note on the earlier models you MUST have 6 places after the decimal!!!!!!!! The factory guys will TELL That the machine wont except more than 4 places! DONT Believe them.

so if you have a thread pitch that is .05000 for a 20tpi thread you have to type it in as .050001 or the machine will not do the proper feed. It will infact default to the last feed rate you typed.

In newer machines Ie 2003 (note: My machines jump from 1997 to 2003 so I don't know exactely when it was fixed.) you don't have to add the extra places to the number but it still has to read E.05 NOT F.05