Cutter collision

[Cambmac]

I have a flat plate with two large counter bores inthe top face. In the middle ofeach c/bore is a drilled hole. On drilling these centre holes the graphics shows the drill passing through the side of the c/bore wall to reach the second hole. I thenput a figure in the pullout distance parameter and all looked well. Imagine my surprise whenthere was one almighty bang on the machine! The graphics showed one thing but the CL file was not retracting. Is this right?


Also, Is it possible to machine from the centre to the outside of a c/bore in a true spiral instead of the cutter stepping out after every revolution?

 

[rocketdude]

Hi Cambmac,


Check your 'CYCLE FORMAT' param. If you have it set to 'COUPLET' then this will output a canned cycle ie G81. In this case, if you put a value of '0' in the 'PULLOUT_DIST' then this will output a G98 with the canned cycle (G98 return to previous Z height). If you leave it to the default '-' then this will assume G99 with your canned cycle (G99 return to R value). Of course, this needs to be enabled in GPOST. (I assume its GPOST you are using). Those basic rules apply to for example a funuc control as there is no option to retract to an intermediate height.


If you want to retract to an intermediate height then this can be achieved by setting the 'CYCLE_FORMAT' param to 'GOTO' and specifying a value in 'PULLOUT_DIST'. This will output a point to point toolpath.