03-16-2014, 10:30 AM
(This post was last modified: 03-16-2014, 10:52 AM by Sunset Machine.)
The chuck seems to be cast iron w/steel (?) strips embedded in it. I'll try a softer wheel and a wider step-over. With my chuck looking like this, even I wouldn't want me working on my stuff with it... But Ed wants me to show it to EVERYBODY, so here it is. 
Oh, I'm using coolant. At .0001", there are no sparks and the chuck doesn't heat. Should I be doing this dry?
Another grinding question: Finding the top surface. I want to make a finish pass of a few tenths, maybe just .0001". That kinda rules out crashing the wheel into the work until it sparks. So, after truing the wheel with a diamond nib, I turn the power off and slide a piece of paper under the wheel while bringing it down to get close. I then use a felt tip marker and make a black spot the size of a postage stamp near a corner. Wheel behind the chuck but centered over the black spot, I turn the power on. Then with the cross feed, I move the table in and out while slowly bringing the wheel down until the ink is removed and finally proceeding with a zillion passes back and forth.
Is there a better/easier method of finding the top of the surface to be ground?
Oh, I'm using coolant. At .0001", there are no sparks and the chuck doesn't heat. Should I be doing this dry?
Another grinding question: Finding the top surface. I want to make a finish pass of a few tenths, maybe just .0001". That kinda rules out crashing the wheel into the work until it sparks. So, after truing the wheel with a diamond nib, I turn the power off and slide a piece of paper under the wheel while bringing it down to get close. I then use a felt tip marker and make a black spot the size of a postage stamp near a corner. Wheel behind the chuck but centered over the black spot, I turn the power on. Then with the cross feed, I move the table in and out while slowly bringing the wheel down until the ink is removed and finally proceeding with a zillion passes back and forth.
Is there a better/easier method of finding the top of the surface to be ground?