Need Help!- CIRCLE END POSITION INCORRECT

[brad white]

I'm using Partsmaster CAM to generate conversational code for my 145 controller on a series I bridgeport. I keep getting CIRCLE END POSITION INCORRECT error when I try to run the code. I spent sometime and figured out that the problem appears to be a rounding error in the finial x y position of the circle. I can edit the file and the error goes away. Is there anyway to avoid this error? I post a sample of the generated code below. The 145 doesn't like the .373 in line 44. If I change it to .372 then it's happy.

38 L X+0,858 Y+1,068 R0 F200 M
39 L X+0,858 Y+0,293 R0 F200 M
40 L X+0,863 Y+0,293 R0 F200 M
41 L X+0,863 Y+0,31 R0 F200 M
42 CC X+0,925 Y+0,31
43 C X+0,925 Y+0,373 DR- R0 F200 M
44 L X+4,275 Y+0,373 R0 F200 M
45 CC X+4,275 Y+0,31
46 C X+4,337 Y+0,318 DR- R0 F200 M

[harley4ever]

Change the actual post processor file, .ppr.

[brad white]

I wonder if I edit the .ppr if there is a way to bump the output up to 4 decimal places? I think part of the problem is the machine uses four places and the .ppr outs three.

[5xmill]

Hi Brad,

This is a very popular Error on the Heidenhain controls and it can be caused by many things. If you are able to edit the post file try letting it output 4 decimals and in your CAM system make the Tolerance smaller. There is a machine parameter which is normally set to 0.01mm but it can't be made larger than 0.016mm so you will need to keep adjusting the Tol and the number of decimals. I hardly use cc and c because of this problem so I just linearize all movements.

[andre-dolphin]

I have attached a post that works to 3 decimal places for metric and 4 for imperial.

ATB
Andre

[Jukka Honkanen]

The "error" is not in the Heidenhain control.
It's in the program / CAM system.
Anyway, the MP7431 defines the arc end point tolerance.
Maximum input is 0,016 mm.
If this is not enough you must correct the program.

[brad white]

Thanks, the new post processor file did the trick It generates four decimal places and my program runs smoothly. I compared it to my original file and I can see differences

old file
:XAXIS = {" X"+DDDDD,dddF}
:YAXIS = {" Y"+DDDDD,dddF}
:ZAXIS = {" Z"+DDDDD,dddF}
new file
:XAXIS = {" X"+DDDDD,dddF} {" X"+DDDD,ddddF}
:YAXIS = {" Y"+DDDDD,dddF} {" Y"+DDDD,ddddF}
:ZAXIS = {" Z"+DDDDD,dddF} {" Z"+DDDD,ddddF}

Brad