Lathe threading approach question.

[g-codeguy]

I am getting two Z values for my threading cycle. The re-thread cycle puts it out correctly. On re-thread I can specify .5 in the "Acceleration clearance" block and my Z approach is Z.5. I have to fudge this value on the thread cycle. Threading with a compound angle other than zero has always been a problem in MC. Problem seems to have been halfway solved in X3.

 

Here is the output I am getting.

 

X.43Z.4991

Z.5

G76P000029Q30R.003

G76X.344Z-.57P230Q100R0.F.03937

 

Anyone know how to eliminate the extra block?

 

Thanks. Dale

[Philcott]

quote:

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I am getting two Z values for my threading cycle

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I am not quite sure what you are refering to . Are you getting a different "Z" value output on your approach?

 

quote:

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On re-thread I can specify .5 in the "Acceleration clearance" block

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Can you not put the same value in on the initial threading pass?

 

Also do you have anything set in the reference point? That might cause you problems.

 

quote:

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Z.4991

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Is this what you're problem is?

[g-codeguy]

Yes, I am getting 2 Z values on the approach. Z.4991 and Z.5 Putting .5 in the"Acceleration clearance" block for the 1st thread cycle yields

 

X.43Z.5073

Z.5082

 

A messed up thread if not modified.

 

Yes the Z.4991 is my problem.

 

Reference point is not selected.