Just got some new MCRNL holders at work so we can use the 100 degree edge on the pile of CNMG 543 inserts we have. I have an ongoing job I added this holder to do an OD rough and remove the nasty scale on forged stock. To be safe I set the Z offset from the protruding shoulder of the tool (see attached picture). My problem is Mastercam calculates the toolpath from the the tip of the tool closest to the part, so my first test setting the tool up was to rough a shoulder, but due to the difference in tool tip interpretation, the tool did not even touch the part. I've got it dialed in pretty well now, but honestly it was guesswork getting the tool offset set, the difference between the tip and the protruding shoulder is somewhere around .200". It's a rougher, before another rougher of a different grade, so it leaves a fair amount of stock.
My thought is that when setting my offsets, I can turn a clean face and OD on the stock as usual, then bring the tool in and scratch the OD, back off in Z, bring X in a thou or less, then jog Z in very slow and set Z0. when the tool makes first contact.
If anyone has any experience on how best to do this I'd appreciate the feedback, thank you.
Side note, getting these holders was great, the OD forge scale is roughed off with a Sandvik 4335 grade on the 100 degree edge, it flat rips through it. I follow it up with a MCLNL holder with a Sandvik 4305 or 4315 grade to finish roughing through the clean steel.
My thought is that when setting my offsets, I can turn a clean face and OD on the stock as usual, then bring the tool in and scratch the OD, back off in Z, bring X in a thou or less, then jog Z in very slow and set Z0. when the tool makes first contact.
If anyone has any experience on how best to do this I'd appreciate the feedback, thank you.
Side note, getting these holders was great, the OD forge scale is roughed off with a Sandvik 4335 grade on the 100 degree edge, it flat rips through it. I follow it up with a MCLNL holder with a Sandvik 4305 or 4315 grade to finish roughing through the clean steel.