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Way to chain for Lathe groove operation


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Here is a question regarding the creation of Chain with C-hook.

 

It is impossible to set the Chain when running

the program like the followings in the Lathe module (Mastercam v9.1SP2).

 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 

1) Creating the blank Lathe groove toolpath operation:

 

operation_manager( &op, OPMGR_INIT_ADD, &d_ptr, &succf );

 

2) Creating the chain by picking the geometric entity (entities) from the graphic

window (repeat the following by the number of the geometric entitiy):

 

add_curve_to_chain( &ew, 0, TRUE, SELECT_BIT, chain, &ce );

 

3) Applying the chain which was just created in the previous step to the blank

operation which was created in STEP 1:

 

cmi.op_idn = op.op_idn;

cmi.mode = CHNMGR_ADD;

chain_manager( &cmi, 0, &succf );

 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 

Some procedures are omitted in the sample above, but anyway, it is possible

to apply the Chain to the Lathe Rough toolpath operations or the Lathe Finish

toolpath operations with the procedures like those.

However, for the Lathe groove toolpath operations, chain_manager() always

results in fail.

 

Is this a defect in C-Hook?

 

Or, is the special procedure needed to do that for the Lathe groove toolpath?

If so, could you let me know the way to apply the Chain to this type of toolpath

operation?

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