post question on helix_tol

[perfecseal mankato]

this is a new pre-defined variable in

ver 9.1sp1. the question I have is

has anyone used this variable yet.

We have all fadal machining centers here

and they sometimes die on helical arcs.

This may be the solution, if I understand the variable correctly.

I understand it as a tolerance in the plane perpendicalar to the arc requiring a specified amount of movement to output the helical arc.

Any input would be greatfully appreciated.

Thanks.

[Roger Martin from CNC Software]

quote:

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I understand it as a tolerance in the plane perpendicalar to the arc requiring a specified amount of movement to output the helical arc.

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You are correct. That is what it is.

The motion distance in the plane perpindicular (the Z axis if doing a helix in the XY plane) that is required for the move to be considered a 'valid' helix move.

 

On the helix motions where your Fadal dies, what is the motion distance in the perpindicular axis ?

If it is too small, the machine may not like that.

 

That is the reason for the HELIX_TOL post varible.

 

Say that the Z axis is only going to move 0.0005" on a helix motion block. If HELIX_TOL is set to 0.001, the post should not output that helix move, but output just a std. arc motion on that block, since the Z motion is less than HELIX_TOL

[perfecseal mankato]

Thanks Roger,

I think I will give this a try,

sounds like it should work o.k.