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Top 10 mods for Mini lathe please ? |
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PekkaNF:
My wife was complementing me, because now there is a clear path cross the room in the garage and on one bedroom that is coming my clean "metrology lab". They still have too much stuff but I'm getting control over it slowly. Lew's document was interesting...I think I could follow intent and procedure pretty well. Only in the end it was a little unclear how the tail stock part was installed over the alignment rod. I think that one peg on the steady rest is made loose and rod has been removed from the chucked weldon holder, then the tail stock upper part dropped into it's place (on epoxy) and finally the rod pushed trough, tightened and collets put finaly to allign the tail stock? What ever you do. Don't use the lathe parts to "lap" ways. It looks fine, feels fine and is all wrong. Pekka |
Buell:
Best thing I did was get divorced...I remember her saying every time I came home from work " Your not leaving those tools in the hallway are you ?" My reply was the same every time .." When you start paying the mortgage and your names on the mortgage I will take them out " I now live in a 3 bed place and One of the bedrooms is converted to a leather working studio !....at this rate the other 2 will be a Machinery shop ! |
Lew_Merrick_PE:
--- Quote from: PekkaNF on November 30, 2016, 05:16:09 AM ---Lew's document was interesting...I think I could follow intent and procedure pretty well. Only in the end it was a little unclear how the tail stock part was installed over the alignment rod. I think that one peg on the steady rest is made loose and rod has been removed from the chucked weldon holder, then the tail stock upper part dropped into it's place (on epoxy) and finally the rod pushed trough, tightened and collets put finaly to allign the tail stock? --- End quote --- Essentially, yes. The main difference is that I used my (vertical height) indicator set-up to verify that my rod was not deformed as the tailstock and epoxy stack-up was aligned. My tailstock and chuck/collet now align within .0001 inch TIR. |
hanermo:
Removed compound. I changed to a BXA QCTP. Fitted a ground ballscrew to x. Ac bearings for x. Changed to CNC. Small steppers. Removed. Bigger ones. Removed. Gecko drives. Removed. I will likely fit the 7x with spare small ac servos, 60V, as I have a set of 10. And a pokeys ethernet controller, good for 125 kHz. Another idea is machining a new 7-8x minilathe from scratch. As a technology demonstrator, probably circa 100 kg in mass. Then made a big, rigid, bed. Back in 2005-2006, +/-. 650x500x120 mm, steel sides 12 mm thick, preloaded with 2 sets of 3x15 mm rebar, crossed and welded under tension. Granite top. Concrete filling. Rigid mount. Approx 150 kg in mass. The bed was the best improvement. Then got a 12x industrial lathe. Never used the 7x since (once for polishing something.) Go figure. Then fitted the 12x for cnc, 3 times. Now with 32/4 mm ballscrew on z, ac servos x and y, ac servo spindle. Yesterday with encoder threading finally connected (yeah). MPG finally connected (yes, yes, YES !!!). Redoing servo mount today... The 7x minilathe was fine, but my stuff is all steel and bigger, so it was just too small for me. |
steampunkpete:
Quick change tool-post Arc Eurotrade brass gibs for top and cross slides. Better gibs for saddle (my own design) Ball-race bearings for top and cross slide lead-screws (gets rid of most of the backlash and feels really smooth) Longer cross-slide lead-screw for longer slide travel Shim lead-screw nuts (eliminates the horrid three-screw, never right, loosens twice a week arrangent - turns head and spits) Lever lock for tailstock Emco T-slot plate bolted to cross-slide (to fit vertical slide for small milling jobs) Handle for headstock Dividing head arrangement for headstock (mostly used for marking out) Taper bearings for headstock |
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