Adjusting for cutter wear?

[kbspeed]

I am wondering if there is a way to write code to decrease the cutter diameter (radius) after each ccyle of the machine. We are grinding glass parts and are trying to figure out how to program the machine to take into effect the wear on the grinding wheel and buffing wheel. Currently manually (typing in, really sucks) decreasing the size of the wheel.

Thanks

[JohnUrz]

Originally Posted by kbspeed I am wondering if there is a way to write code to decrease the cutter diameter (radius) after each ccyle of the machine. We are grinding glass parts and are trying to figure out how to program the machine to take into effect the wear on the grinding wheel and buffing wheel. Currently manually (typing in, really sucks) decreasing the size of the wheel. Thanks

Try Using the ware offset

[Geof]

Use G10 L12 G91 P(Tool Number) R(Change in diameter) in a looped subroutine to incrementally change the tool dia.

[kbspeed]

I will try this but will it keep reducing the diameter after each cycle of the mill. Does it keep track even after restarting the cycle?

Thanks for the help.

[Geof]

The G10 command does not "keep track" of anything; all it would do is reduce the value in the tool diameter table by the change in diameter you put in the command. You have to enter the starting diameter and you have to estimate how much wear is occuring on each cycle and enter that into the change in diameter.

You are not going to avoid doing some manual entry because it is very unlikely the value you put in for the change in diameter will be exactly correct. This means that gradually the diameter in the tool table will become either smaller or larger than the actual diameter of the wheel as it wears so you will have to periodically correct the tool table entry.

[Matt@RFR]

If you have enough parts to make to justify the cost, you could add the Renishaw probing package. This would allow you to probe the diameter of the wheel and update the tool offset automatically.