i just got one of those cheep collet closers and it is off by .002. how are you folks correcting the errors in them?
-
Welcome back Guest! Did you know you can mentor other members here at H-M? If not, please check out our Relaunch of Hobby Machinist Mentoring Program!
collet closer
- Thread starter maineshops
- Start date
What do you mean by collet closer? Do you mean collet chuck? Collet fixture?
More pics and/or more info and I'd be glad to chime in.
Bernie
More pics and/or more info and I'd be glad to chime in.
Bernie
sorry for not being clear. it is the one with the D1-4 cam lock adapter and is the scroll type. as near as i can see i'll have to bore out the backing plate and put jacking screws in to adjust it. anything to try before i do that?
are we talking T.I.R is .002? meaning an actual location error of .001? if so, that's really not much.
The first thing you need to do is determine exactly where is the error. Mark the "high side" and then remove the collet closer, and rotate it 90 deg's and see if it stays the same or changes. If It were me, I'd be tempted to rework the tapered mating surface inside the closer.
Set the compound to the same angle as the angle inside the taper with an indicator, then devise a way to remove the small amount from the side that needs it. You probably don't have a tool post grinder, it's possible you could remove that small amount with a carbide tool, or maybe make an improvised grinder mounted to the tool post with a dremel. If you choose to work on the back side, then I would think you would only remove enough material to allow the "play" to put it in the right spot, and assemble it with a piece of .001 shim stock on one side, and lock it down tight. Once it's in the right place it's not likely to ever move unless you crash it some big way.
The first thing you need to do is determine exactly where is the error. Mark the "high side" and then remove the collet closer, and rotate it 90 deg's and see if it stays the same or changes. If It were me, I'd be tempted to rework the tapered mating surface inside the closer.
Set the compound to the same angle as the angle inside the taper with an indicator, then devise a way to remove the small amount from the side that needs it. You probably don't have a tool post grinder, it's possible you could remove that small amount with a carbide tool, or maybe make an improvised grinder mounted to the tool post with a dremel. If you choose to work on the back side, then I would think you would only remove enough material to allow the "play" to put it in the right spot, and assemble it with a piece of .001 shim stock on one side, and lock it down tight. Once it's in the right place it's not likely to ever move unless you crash it some big way.
i did all the normal things Levi and still can't find the error. your right, normally i woulden't worry about .001 but i built a cnc router and i am trying to get a problem worked out of a x axis shaft and motor and would like to get as close as possible to minimize that error. i can get in there with my tool post grinder but i find it difficult to believe that they could grind that taper out of round. as near as i can tell the error is with the backing plate mounting.
