help with bobcad on a hurco kmb1

[jpcuttergrinder]

I have recently purchased a Hurco kmb1 mill. I have used it a little using the hurco conversational programming but now I am trying to program it using bobcad 21.

I am trying to mill out the profile of a rocker arm for a pulling tractor. I tried using the post processor that was supplied by Bobcad and the machine won't even take the program because it has to have a % sign at the start of the program.

I have contacted the previous owner of the mill and he used to program it with bobcad v 20. He helped me a little but something is still not right.

I am milling the rocker in 4 passes each at .250 deep at an offset of .280 using a .500 cutter. This gives me a .030 finish pass.

My main problem is that the cutter will plunge to -.250 and start milling but on arcs it ramps up to 0 by the time it gets to the start of the next arc when I want it to stay at -.250 and cut all the way around the part. Also when I get to milling out the 1" hole in the center of the rocker, the mill stops and says "bad arc DB" . I don't know if the problem is in the way I draw the part or just the way post processor is producing the g-code? By the way, the simulation in bobcad seems to work just fine.

Any help would be appreciated.


Here is my program

N 2%
N 4G00
N 6G90
N 8G70
N10M25
N12S2500 M3
N42Z0.5
N44X0.418Y0.05Z0.5
N46G01Z-0.25F5.
N48X1.1102Z-0.25F10.
N50G02X1.1171Y0.0488Z-0.25I1.1102J0.03K-0.25
N52G03X4.3262Y0.1998Z-0.25I2.5438J3.9015K-0.25
N54X3.9236Y1.4342Z-0.25I4.042J0.79K-0.25
N56G02X2.9587Y1.8745Z-0.25I3.7563J2.3449K-0.25
N58G03X0.7763Y1.6998Z-0.25I1.91J1.256K-0.25
N60G02X0.4485Y1.491Z-0.25I0.4694J1.8199K-0.25
N62G03X-0.062Y1.012Z-0.25I0.418J1.012K-0.25
N64G01Y0.53Z-0.25
N66G03X0.418Y0.05Z-0.25I0.418J0.53K-0.25
N68G01Z-0.5F5.
N70X1.1102Z-0.5F10.
N72G02X1.1171Y0.0488Z-0.5I1.1102J0.03K-0.5
N74G03X4.3262Y0.1998Z-0.5I2.5438J3.9015K-0.5
N76X3.9236Y1.4342Z-0.5I4.042J0.79K-0.5
N78G02X2.9587Y1.8745Z-0.5I3.7563J2.3449K-0.5
N80G03X0.7763Y1.6998Z-0.5I1.91J1.256K-0.5
N82G02X0.4485Y1.491Z-0.5I0.4694J1.8199K-0.5
N84G03X-0.062Y1.012Z-0.5I0.418J1.012K-0.5
N86G01Y0.53Z-0.5
N88G03X0.418Y0.05Z-0.5I0.418J0.53K-0.5
N90G01Z-0.75F5.
N92X1.1102Z-0.75F10.
N94G02X1.1171Y0.0488Z-0.75I1.1102J0.03K-0.75
N96G03X4.3262Y0.1998Z-0.75I2.5438J3.9015K-0.75
N98X3.9236Y1.4342Z-0.75I4.042J0.79K-0.75
N100G02X2.9587Y1.8745Z-0.75I3.7563J2.3449K-0.75
N102G03X0.7763Y1.6998Z-0.75I1.91J1.256K-0.75
N104G02X0.4485Y1.491Z-0.75I0.4694J1.8199K-0.75
N106G03X-0.062Y1.012Z-0.75I0.418J1.012K-0.75
N108G01Y0.53Z-0.75
N110G03X0.418Y0.05Z-0.75I0.418J0.53K-0.75
N112G01Z-1.F5.
N114X1.1102Z-1.F10.
N116G02X1.1171Y0.0488Z-1.I1.1102J0.03K-1.
N118G03X4.3262Y0.1998Z-1.I2.5438J3.9015K-1.
N120X3.9236Y1.4342Z-1.I4.042J0.79K-1.
N122G02X2.9587Y1.8745Z-1.I3.7563J2.3449K-1.
N124G03X0.7763Y1.6998Z-1.I1.91J1.256K-1.
N126G02X0.4485Y1.491Z-1.I0.4694J1.8199K-1.
N128G03X-0.062Y1.012Z-1.I0.418J1.012K-1.
N130G01Y0.53Z-1.
N132G03X0.418Y0.05Z-1.I0.418J0.53K-1.
N134G00Z0.5
N226X2.13Y1.256Z0.5
N228G01Z-0.25F5.
N230G03Z-0.25I1.91J1.256K-0.25F10.
N232G01Z-0.5F5.
N234G03Z-0.5I1.91J1.256K-0.5F10.
N236G01Z-0.75F5.
N238G03Z-0.75I1.91J1.256K-0.75F10.
N240G01Z-1.F5.
N242G03Z-1.I1.91J1.256K-1.F10.
N244G00Z0.5
N266X0.418Y0.05Z0.5
N268G01Z-1.F5.
N270X1.1102Z-1.F10.
N272G02X1.1171Y0.0488Z-1.I1.1102J0.03K-1.
N274G03X4.3262Y0.1998Z-1.I2.5438J3.9015K-1.
N276X3.9236Y1.4342Z-1.I4.042J0.79K-1.
N278G02X2.9587Y1.8745Z-1.I3.7563J2.3449K-1.
N280G03X0.7763Y1.6998Z-1.I1.91J1.256K-1.
N282G02X0.4485Y1.491Z-1.I0.4694J1.8199K-1.
N284G03X-0.062Y1.012Z-1.I0.418J1.012K-1.
N286G01Y0.53Z-1.
N288G03X0.418Y0.05Z-1.I0.418J0.53K-1.
N290G00Z0.5
N292X2.16Y1.256Z0.5
N294G01Z-1.F5.
N296G03Z-1.I1.91J1.256K-1.F10.
N298G00Z0.5
N300M05
N302M25
N304M02
N306%

[tobyaxis]

If the previous owner used BCC to program this machine you can Copy his Post Processor into your BCC files and use it.

This might help you to produce good G-Code for your Mill.