[dingo0722]

I am trying to create a 3/8 NPT. here is the code for the event

G01X.636F0.0556
G71X.5788Z-.2735A178.201H.0481D.02U.02B60F.056J18

When I use this I get an Error Code 2254

If I input A as 1.7988 the cycle runs but the taper is inward

What am I doing wrong here

thanks

[OkumaWiz]

I typically is an I value rather than an A. Have you tried a negative A value with the small angle?

I think your A178 is too large according to the error message.

Best regards,

[littlerob]

I agree, I never use the A value, I always use I, it's much simpler, less trig. is always better in my book.

Robert

[broby]

The whole point of using the A value is that you can easily enter the taper angle for the desired thread.
i.e 1.798 for BSPT threads.
The idea behind the I value is for taper correction.
You are probably just entering the angle improperly. A178.2 is totally incorrect.
A1.798 should be correct.

[littlerob]

The whole point of using the A value is that you can easily enter the taper angle for the desired thread.
i.e 1.798 for BSPT threads.
The idea behind the I value is for taper correction.
You are probably just entering the angle improperly. A178.2 is totally incorrect.
A1.798 should be correct.

Yeah but who the hell uses bspt threads, freakin' Aussies.

I cut a few different angles on threads so I like the I value. But like I said before I never use the A, does it cut the right thread angle regardless of lenght of engagement or start points or whatever?

Robert

[broby]

Yeah but who the hell uses bspt threads, freakin' Aussies.

I cut a few different angles on threads so I like the I value. But like I said before I never use the A, does it cut the right thread angle regardless of lenght of engagement or start points or whatever?

Robert

haha up yours Rob!
Well Rob, we actually use BSPT and NPT threads fairly often.
Could also be used for API threads, but that is a Licensed thread form I think...?

haha just goes to show ho dumb you damn yanks are...!
Yes the taper angle stays consistent over whatever length that you specify, or whether you change the start point on X.

Cheers to you, you dumb bum!
hahahahhahahahahahhaa
Brian.

[DouglasR]

I've never used the "A" function in a thread cycle, only the "I" factor. I do know that for "A" - it's degrees specified from 3 O'clock, at least on my OSP5000. So a 178 in "A" would be nearly 180 degrees from 3 O'Clock.

[littlerob]

haha up yours Rob!
Well Rob, we actually use BSPT and NPT threads fairly often.
Could also be used for API threads, but that is a Licensed thread form I think...?

haha just goes to show ho dumb you damn yanks are...!
Yes the taper angle stays consistent over whatever length that you specify, or whether you change the start point on X.

Cheers to you, you dumb bum!
hahahahhahahahahahhaa
Brian.

Oh nice, the hits keep coming. I cut ALOT of API threads, I don't know about any license agreement. Easy enough though. I may try using the A value though, it seems like there was something that turned me off about using it, I just can't remeber what it was.

[Superman]

You 2 are worse than the kids in the back seat
"are we there yet ?",
" how long now ? "

Rob(wedge):argue::stickpokeBrian

:tired: :tired:

[broby]

Oh nice, the hits keep coming. I cut ALOT of API threads, I don't know about any license agreement. Easy enough though. I may try using the A value though, it seems like there was something that turned me off about using it, I just can't remeber what it was.

Was probably your dumb brain being unable to understand the command!

BTW He started it first!
He poked me!!

Are we there yet?

[littlerob]

[Chispas]

I am trying to create a 3/8 NPT. here is the code for the event

G01X.636F0.0556
G71X.5788Z-.2735A178.201H.0481D.02U.02B60F.056J18

When I use this I get an Error Code 2254

If I input A as 1.7988 the cycle runs but the taper is inward

What am I doing wrong here

thanks

Did you find out solution

[deadlykitten]

hi Chispas, i don't have time now to test the original code ... please, what exactly do you wish ?

The whole point of using the A value is that you can easily enter the taper angle for the desired thread

yup, indeed, A value is pretty expressive to input the desired angle, and it remains the same, regardless of threading travel, that may change when clearances are shifted

So a 178 in "A" would be nearly 180 degrees from 3 O'Clock

trigonometry has some simetry among the quadrants, so check this code, with a simplified value for the A argument; ups, i just saw that also mr wizard sugested this at #2 / kindly

    G50 S2000
    G00 X500 Z250
    T101
    G97 S1234 M42 (M08) M03
    G00 X50 Z5
    G33 X40 Z-35 F0.75 G95 A-2
    G00 X500 Z250 T100
    M02


(
     A           X for thread end
    178 or -2     42.793
    182 or  2     37.207


  checking : [ 42.793 + 37.207 ] / 2 = 40 : same as G33 X40
                2.793 / 2 = 1.3965        : same as attached


)