MetalworkingFun Forum

Condomized the mill for machining cast iron.

Ed

[attachment=18542]

Quite the optimist, aren't you?

(12-28-2023, 03:28 PM)rleete Wrote: [ -> ]Quite the optimist, aren't you?

Probably.

Ed

Hey, Ed. After you wash your hands, scrub them with shampoo. You'd be amazed how much more black you'll get out.

Do we get a hint as to what you are making?

(12-29-2023, 12:08 PM)rleete Wrote: [ -> ]Do we get a hint as to what you are making?

A block to mount the QCTP on to eliminate the compound. I made one previously but for some really stupid reason I did not make it to the same height as the compound which requires me to adjust the tool holders in the QCTP when I switch between the block and the compound. A royal pain in the butt because of my stupidity!

I machined two sides of the block and found there ware ridges on the surfaces that pointed to an out of tram mill head so I de-condomized the mill and measured the tram. I was expecting the Y tram to be out based on the ridges but it was spot on and the X tram was within .00025" so out of tram was eliminated. Next I measured for jaw lift on the movable jaw of the vise but there was none at all. Perplexing to say the least.

So now I'm trying a fly cutter to see if I get better results. To be continued.  

Ed

Maybe too much play in the ways? New mills have to run in a bit to seat, and then need to be readjusted to eliminate any play.

(12-30-2023, 03:19 PM)rleete Wrote: [ -> ]Maybe too much play in the ways?  New mills have to run in a bit to seat, and then need to be readjusted to eliminate any play.

I don't think that's it. I've got the gibs fairly tight, but it's worth testing with a DI to see if there's any movement.

The fly cutter isn't working too well. I think the geometry of the cutting edge is not quite right so I'm going to put that project aside for now and work on something else until I get the tool ground properly.

Ed

Flycutting is the way to go. RPM slow, medium feed. Small radius on cutter, absolutely sharp. I don't use top rake for CI, but do for aluminum.