coordinate rounding issue

[mowens]

We have an ancient Thermwood post processor. Our updated MCX post seems to treat circular interpolation differently than linear. Notice the Y coordinates below. It rounded the Y on the G03 differently than the G01. It's not much, but it's just enough to freak out our machine. Sometimes it's worse than this.

 

G0 X-4.4547 Y-1.13929

G01 Z.025 F75.0

G03 Y-1.1393 I-.375 J0. F250.0

G01 Y-1.13929 Z1.

G0 X-4.8297 Y-1.13929

 

The machine reads this code but just makes a tiny circle or none at all, just a plunge move. Any suggestions would be greatly appreciated.

 

Thanks

[Slepydremr]

You can try searching your post for the following:

 

code:

---

fmt  X  2   xabs        #X position output

fmt Y 2 yabs #Y position output

fmt Z 2 zabs #Z position output

---

This should make you post out put X, Y, And Z to only 4 decimals and should round it to match what was on the G03 line.

 

It's my only idea... But it might work for you.

 

Jeff

[mowens]

Slepy,

 

Unfortunately, this post is so old it looks very different from those included with MCX. Judging from the header this post was originally written in version 4. The closest I could find to what you suggested was this:

 

# --------------------------------------------------------------------------

# Format Assignments

# --------------------------------------------------------------------------

# Axis output formats - Linear

# --------------------------------------------------------------------------

fmt X 1 x$ # X Axis Pos

fmt Y 1 y$ # Y Axis Pos

fmt Z 1 z$ # Z Axis Pos

fmt X 1 xr$ # X Rapid Pos

fmt Y 1 yr$ # Y Rapid Pos

fmt Z 1 zr$ # Z Rapid Pos

fmt X 1 xh$ # X Home Pos

fmt Y 1 yh$ # Y Home Pos

fmt Z 1 zh$ # Z Home Pos

 

When I changed the top 3 to a value of 2 it didn't appear to change the code. I'm thinking maybe I should modify one of the generic posts in MCX and just forget about the dinosaur we're using now.

 

I see you're from Wichita, too.

[Slepydremr]

I noticed that section was labled:

 

# Axis output formats - Linear

 

There isn't another section labled

 

# Axis output formats - Circular or arcs

 

where the values are different?

 

I don't know alot about the old post I've only been using since VER 8.1. So I'm just guessing here.

 

If you want to email it to me at [email protected] I could try messing w/ it during my break later. and see If i can find the answer your issue.

 

 

Yep I've Been here my whole boring life...