Peck Drilling

[MillMan]

Help...I'm peck drilling holes of varying depths in the same operation. Some drill fine but on others (Deeper Holes) it plunges to full depth, retacts to retract depth and then begins pecking.

 

Anyone know what's going on?

[Roger Peterson]

Your machine may not like changing the depth (Z value) mid cycle. You can try reordering your points so that the deepest is the first point drilled, as odd as it sounds I have seen this actually work. Also, what kind of machine is it? Are you using a deep hole pecking cycle (with I, J, and K values)? If so don't, use a standard peck cycle with a Q value, these values are sometimes only calculated once (at the callout line).

 

 

HTH

[MillMan]

Thanks, I'm running Haas and Milltronics machines.

I changed the order to a deep hole first...It drills the first hole fine then back to plunging..

Anymore thoughts?

[Roger Peterson]

It does this on both machines? Post your drill cycle on here.

[Mike Whitten CAD/CAM Contractors]

Just a guess, maybe it needs a G80 inbetween?

 

Mike

[Roger Peterson]

Mike you may be correct, but I have done this for sure on a milltronics and almost as sure on a haas. There are machines that if you want to change the depth or any parameter that you need to cancel the cycle and start again, I really don't beleive these fall into that group.

 

 

JM2C

[Mike Whitten CAD/CAM Contractors]

I am not sure, I would like to see the code though.

 

Mike

[iowajim62]

Millman,

 

quote:

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Help...I'm peck drilling holes of varying depths in the same operation

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Take them and put them in separate operations.

Time spent guessing whats wrong is valuable. Just make new operations with each depth done right. Not being a smarta$$ just think you could be done already thats all.

[perfecseal mankato]

Millman,

I have seen this in some particular drill cycles

What I have done is actually edited the post for the particular drill cycle.

Then everytime the post encounters a depth change it will cancel the drill cycle and call out a new drill cycle with the new depth.

This makes it real easy for programming, just window all arcs and set the drill depth to incremental with a a value of zero.

The post edit takes a bit of time,but it will make your job alot easier.

If you would like some more info just e-mail me.

[MillMan]

Thanks for all the feedback...the strange thing about all this is we're drilling 400-500 holes per set-up this way for over a year and this behavior has just started.

Maybe altering the post is indeed the way to go.