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| awemawson:
The 80 mm diameter plastic hand wheel was smashed, and it was a bit of a mystery how it was fixed, until I turned the remains off carefully on the lathe. This revealed that it was an 11 mm shaft with loctite and a taper pin. Ebay kindly provided me with an identically shaped handle (but black not grey!) however the mounting was an M10 thread. So the 11 mm shaft got turned down and threaded thus: |
| awemawson:
I will need to bore a hole aligned with the axis of the barrel to allow knock out of the morse taper using a tapping rod, as there is no other provision. I strongly suspect this is how & why the original handle was broken. This mornings job was to make a stepped key for the base. The milling machine has 18 mm Tee slots and the base of the tailstock is grooved 16 mm, so a bit of milling this morning produced this: |
| awemawson:
I am a little concerned that automatic tool changes may take tools ever so close to the tailstock, so at the moment I'm seriously considering making a cardboard mock up of the size of the tail stock and performing a few tool changes to prove that there is clearance. It's remarkably difficult to see during a tool change cycle exactly where in space things are as there's no real reference point for the eye to latch onto ! |
| Pete W.:
Hi there, Andrew, --- Quote from: awemawson on March 16, 2014, 08:19:25 AM ---I am a little concerned that automatic tool changes may take tools ever so close to the tailstock, so at the moment I'm seriously considering making a cardboard mock up of the size of the tail stock and performing a few tool changes to prove that there is clearance. It's remarkably difficult to see during a tool change cycle exactly where in space things are as there's no real reference point for the eye to latch onto ! --- End quote --- Maybe Wax would be better then Cardboard? |
| awemawson:
No Pete I want something that will just be swept away without damage - it's my Heidenhain probe I'm most concerned about. It's pretty well the longest tool in the crib, and definitely the most delicate as the ruby is mounted on a thin ceramic tube that would easily break if it hit wax. Whereas a thin card mock up would probably not damage it before I leap for the ESTOP button. I may be able to find a parameter in the control that slows the motion down during tool changes, and thus be able to avoid the Blue Peter modelling approach :lol: |
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