Minimum Vertical Retract - w HAAS

[EazyE]

With HS toolpaths and minimum vertical retract I get gouges and cut corners . Verify and backplot show no collisions or gouges.. I am thinking this is a machine thing not a mx thing. the way the table moves to a point is not in 2 points at the same time but a 45 with the x y and if the y finishes first well then the x will gouge.. Any one know how to fix this problem other than not using the minimum retract option .....

[Murray Mold]

It has to be a machine thing because I use it alot on a different type machine with no gouges.

[EazyE]

I seem to remember coming across a setting that would change the way the table reaches a point. Cant find it now .. Figures

[iowajim62]

Try in the Control Def/Linear

[Colin Gilchrist]

There is a much better option to fix your problem. Turn off "Rapid Retract" and use a feedrate. Enter the highest feedrate the machine can interpolate at. This will save your bacon when the machine would dog-leg at rapid, it will now interpolate the moves...

 

HTH,

[Gary]

Yes just check output feed moves with mpmaster post. Code is output as g1's instead of g0's.

My haas don't like min. distance though, seems jerky in the acc/dec

[EazyE]

Colin and Gary - Thanks guys i appreciate your help with the situation.. Gary - the new vf4's (2) that we have are pretty good with it but the older vf2 has the same jerky typw movement

[Colin Gilchrist]

Easy,

 

If you use "Minimum Distance" and output a feed move instead of a rapid move you will really like it. It just smooths out the motion really nicely and keeps your machine from giving you unexpected gouges. Just make sure your clearances values are high enough. I'm pretty sure these are calculated from the surfaces/solid, not necessarily from the stock that is left on the part. Just a word of caution... I'm lucky, I get to run everything in Vericut...

 

So far we are crash free for over a year now...

 

 

knock on wood...

[EazyE]

Thats a good run right there Colin .. thanks

[CAM CRAZY]

I program for a couple Haas and had this problum also, it was a frustrating one to figure out. When the Haas rapids it moves both X and Y axis as fast as it can, when 1 axis gets to it's position then the other axis finishes were it is going. The HS toolpaths assume that it rapids in a direct line, both axis reaching the endpoint at the same time. That is why outputting feed move is the best option. If you output a G01 then it forces a linear move. The only thing I don't like is when you output a feed move then the rapid override is non functioning on that operation.