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Chucker Project-Gunner?

I just read your last post from a month ago about not using cog belt for spindle but I had already installed the cog and I don't see any flaws in the surface finish so am lucky there but have a couple other issuse. The brake seems to work fine but I disconnected it because in the brake off mode the solenoid is energised and it has an obnoxious hum to it. I cleaned it all up but don't know if there is a way to silence it.Second problem is it cuts a taper.At least .001 inch in 3 to

4 inch long stock. I don't see any provision for tweaking the head but I did loosen the headstock set screws so I could slide the headstock around and installed a small wedge in the back left side of the dovetail and fiddled with this untill she cut true.Hokey but seems to work.I can't believe the ways are worn unough in 4 inches to cause this. Are there any other solutions ? Thanks Jim
Reply to
Jim Moser
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A large lathe will cut a taper if it is not properly leveled.

Reply to
Dave Lyon

A small lathe, ie. 10" Atlas, will also cut tapers (and hyperbolas if you make the part long enough) if the ends are not parallel. I wouldn't have believed how sensitive this could be unless I'd seen it myself. It made an amazing difference when I leveled both ends with a master precision level (.0005" / 10")

Jon

Reply to
Jon Elson

Ahh, true except for hardinges. Because the bed is on a three point kinematic mount, there is neither provison for, or need of, any kind of levelling.

Jim

Reply to
jim rozen

Thanks Jim, I didn't think leveling would have much effect on this lathe with the solid ways and short envelope and the parts I am testing run within .0001 in my other lathe with the same insert and overhang ? Jim

Reply to
Jim Moser

Nope..you pretty much got it. Instead of shims..you COULD have drilled the side of the headstock over the dovetail and installed setscrews to push in the proper directions...shrug..but if it works...it works and shim stock doesnt come loose

Make up a gage, with a dial indicator on one end, and lay it over the ways..with one side held tightly against the back of the ways..and the front of the ways against the spring loaded rod of the indicator..and slide the gauge along the ways...you will be surprised on how much saddle you will find in many lathes.

Gunner

"Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules.

Think of it as having your older brother knock the shit out of you for torturing the cat." Gunner

Reply to
Gunner

Quite right, I meant to mention this in my comment. There are several other lathes that are built this way.

Jon

Reply to
Jon Elson

I assume the brake solenoid coil is just belly up ? No Fixes ? Jim

Reply to
Jim Moser

I missed that part. Nearly all the brakes hum to one degree or another. Depending on type..I have spare brake units.

Gunner

"Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules.

Think of it as having your older brother knock the shit out of you for torturing the cat." Gunner

Reply to
Gunner

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