[Joe Johnson]

Originally Posted by RaMoore

Pictures of unhardened carrier as promised.

The damage is not as extensive as other teams have seen, but a clear difference from the hardened one.

As for the repeated cycles of heat, we tested with the knife scratch and it did seem to change it, for whatever the reason. I don't think any of us has had a class on the subject just some practical experience and some googling. I think we could try Kevin Sevcik suggested method for hardening if we can get it that hot.

This is the beginning of a failure but it is still a long way from a robot making a perfect circle. Will you please continue the test until a failure that stops the robot occurs? If you take pictures periodically and post them, all the better. If you send me your address, I will send you a replacement for the carrier.

This will be a very good set of data to capture the failure and to test possible solutions (with perhaps something to test coming in a few days).

Thanks.
Joe J.