10 start thread

[TIMVAL]

I am looking for some help with a multiple start thread issue

 

the thread is a 1.0 lead ( 10 tpi ) 10 start .

 

i just can seem to get the threads to fit

does any one see anything wrong with this code ?

 

O00010(10 START )
T0404
G54
G50 S300
G97 S300 M03
G0 X6.8 Z.2252
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 W.1
G76 X6.57 Z-.7 K.0825 D.002 F1.
G0 Z10. M05
M30

[ScottBro4]

From what I see of your code it looks like it should work. What do you mean by the threads wont fit?

[cncchipmaker]

The code looks good.

[DavidB]

Your feed should be 10

[The Cathedral]

As long as he's in IPR mode, it should be 1. like he has it- one inch per revolution.

[TIMVAL]

im in inches per rev ..

 

the thread spacing is advancing to far in 360 deg. the 7th thread is almost into the first thread .. I am lost .

 

i made a 5 start and it works perfectly fine .

 

i can't understand why 10 wont work

[The Cathedral]

You might be having an acceleration/deceleration issue. 1" IPR is moving pretty fast and if the turret isn't up to speed by the time it starts cutting, you're going to get some major variance in helix angle. Are you threading up to a shoulder? If not, I would change my end point to be past the part.

[Sticky]

You might be having an acceleration/deceleration issue. 1" IPR is moving pretty fast and if the turret isn't up to speed by the time it starts cutting, you're going to get some major variance in helix angle. Are you threading up to a shoulder? If not, I would change my end point to be past the part.

 

 

That would be my first guess as well. If you have the torque, maybe try 150rpm and see if there is an improvement?

[TIMVAL]

ok thank you i will slow it down and give it a try

[Mike@Lustre]

are you sure your encoder is capable of reading that thread pitch at that feed rate ??

 

 

years back I worked on a Haas TL3 and the encoder was limited to reading 100 inches per minute , so one had to watch the feed rate and rpm to not exceed the capabilities of the encoder .

[ScottBro4]

are you sure your encoder is capable of reading that thread pitch at that feed rate ??

 

 

years back I worked on a Haas TL3 and the encoder was limited to reading 100 inches per minute , so one had to watch the feed rate and rpm to not exceed the capabilities of the encoder .

 

This is a good point. 1.0 per rev is quite a bit. Maybe cut your feed and W moves in half and see if it still runs into each other.

[Guest]

Max feed on a FANUC is 192 IPM for threading. My vote is for cutting the speed in half.