Surfacing Question?

[ce@mastertool]

Hi All,

 

When posting a surface parallel program. If I do not have Rapid Feed rate set the same as Feed Rate. My first move, after the z plunge is at the

rapid rate. I have worked around this since version 6.1 Habit I guess!

 

Is this something that can be changed in my post? Or is there another work around?

 

Chris

[Bill]

I am not a post guy, but I would think it is in the post you have.

 

Let everyone know what post you are using and what machine you have.

 

I am sure someone can give you an answer.

[ce@mastertool]

I'm not a post guy myself. I can usually strugle through with some help.

 

I'm using the generic MPFAN post, executable version 9.18 Converted from v9 to X.

 

Controls are Fanuc 15m, Fanuc Pro 3.

 

Chris

[ce@mastertool]

I've looked in the post. Maybe its there, It looks confusing to me.

 

Anybody else see this posting surface parallel?

I find the same issue in other surfacing as well.

 

Anybody?

[deckerc]

I had a similar issue a while back. Mine was caused by not having rapid retract checked on the previous operation. the post then didn't realize it was in a G0 on the next tool change and rapided into the part.

[ce@mastertool]

I don't have an issue with the tool change. Or the

rapid motion to Feed plane. What is happening is the tool feeds to z depth at rapid feed."great" Then feeds to the first x or y at rapid feed" not so great". The following x or y changes to feed rate.

 

The result being the cutter entering the part at high feed rate. Or if I lower rapid feed rate to match feed rate. Slow motion to z depth.

 

This only happens in some surface paths. No problems in conventional paths ie contour, pocket,circle mill, ect.

 

Chris

[Guest]

Chris,

 

check your mail.

[Guest]

What you are seeing Chris is I "think" a function of the toolpath itself.

 

You tool comes down to your rapid height, uses the plunge feedrate down to cut position, uses the plunge feedrate up to where your stock definition begins, then it jumps down to the cutting feedrate.

 

I don't know it there is a way to adjust this.

[ce@mastertool]

Thanks John,

 

You've made me see something differently. I still have some issues with this. Maybe I just need to watch what I'm doing a little closer!

[crazy^millman]

are you using direction for this toolpath. Ig you are your plunge and retract feedrate come into effect. I will most time use direction and a Z nagle to ramp into a part so my cutter is not plunging directly on the part. Now you might ask if I am closed in that does not work well it will if the cuts are going in the same direction for a start just think of using the angle of apporach 180 and it will od the same thing but starting 180 from the wall.

 

HTH

[crazy^millman]

Are you using direction for this toolpath? If you are your plunge and retract feedrate come into effect. I will most time use direction and a Z nagle to ramp into a part so my cutter is not plunging directly on the part. Now you might ask if I am closed in that does not work well it will if the cuts are going in the same direction for a start just think of using the angle of apporach 180 and it will od the same thing but starting 180 from the wall.

 

HTH