OSP-10UL NPT Treading Cycle

[dingo0722]

Does anyone have an NPT thread cycle that I can look at for an Okuma OSP-10ul controler for a Crown turning center. We can create straight threads on the machine but every time we try to create a tapered thread we get errors.

Thanks

[OkumaWiz]

If you use the same format but swap your x value with either an A (angle) or I ( incremental change of x value) command it will work.

If not, post the alarm you are getting along with the description.

Best regards,

[littlerob]

If you use the same format but swap your x value

This is not accurate is it? You still need a finish X value, but add the I for the amount of taper across the Z distance. Maybe I misinterpreted, but I have always needed an X value.

Robert

[OkumaWiz]

This is not accurate is it? You still need a finish X value, but add the I for the amount of taper across the Z distance. Maybe I misinterpreted, but I have always needed an X value.

Robert

Yes, you are correct, thanks for clarifying it.

I guess I should have slowed down and adjusted my transporter lock first before beaming.

Best regards,

[dingo0722]

So here are the variable we use for a straight thread

G71X.6825Z-3H.096D.005U.01B60F.1111

If I wanted to change this to a tapered thread what should I change or add?

[OkumaWiz]

So here are the variable we use for a straight thread

G71X.6825Z-3H.096D.005U.01B60F.1111

If I wanted to change this to a tapered thread what should I change or add?

Add an I value to the line where I=change desired in X diameter.

For example: If I.02 were added to your line, you would end up at X.7025 while starting at X.6825.

Obviously start point and end point are important in figuring out correct I value to use.

Best regards,

[littlerob]

If your tool is moving from *
Z.1 to Z-.4, than your tool is moving .5 inches. The taper amount is .75" per foot. Pues, .75/12=.0625. .0625*.5=.3125. You use that value radially, so divide it by 2, .3125/2=.1562. That would be your I value. Keep in mind that the more you increase your taper, the more you will have to increase your H value to comp for the thread pull out

[OkumaWiz]

If your tool is moving from *
Z.1 to Z-.4, than your tool is moving .5 inches. The taper amount is .75" per foot. Pues, .75/12=.0625. .0625*.5=.3125. You use that value radially, so divide it by 2, .3125/2=.1562. That would be your I value. Keep in mind that the more you increase your taper, the more you will have to increase your H value to comp for the thread pull out

.0625*.5=.03125 and divide by 2 = .01562...guess who's not locking before beaming now!

[littlerob]

.0625*.5=.03125 and divide by 2 = .01562...guess who's not locking before beaming now!

That has to be the first error I have ever made, in my life.

Realistic excuse though; I posted that from my phone, so I had to keep switching from internet to calculator, any way I suck, OkumaWiz rules.

Robert

[OkumaWiz]

That has to be the first error I have ever made, in my life.

Realistic excuse though; I posted that from my phone, so I had to keep switching from internet to calculator, any way I suck, OkumaWiz rules.

Robert

I sucked last time ,so we're even. Now we both have made only 1 mistake in our lives

PS>Is there a pinocchio smiley face??

[dingo0722]

If your tool is moving from *
Z.1 to Z-.4, than your tool is moving .5 inches. The taper amount is .75" per foot. Pues, .75/12=.0625. .0625*.5=.3125. You use that value radially, so divide it by 2, .3125/2=.1562. That would be your I value. Keep in mind that the more you increase your taper, the more you will have to increase your H value to comp for the thread pull out

When you run G71 for an NPT should I create a taper cylinder prior to treading or will the cycle create the taper on its own? Also what do you mean by having to increase the H valve. Isn't H just the total thread depth?

[OkumaWiz]

I usually don't cut a tapered cylinder first since threading is basically a roughing cycle and the taper is small.

Since you are cutting a taper, the thread is getting bigger on one end so your thread depth is getting "deeper" by the amount of taper. Thus the H value has to increase to compensate for the taper.

Best regards,