On Thursday, November 17, 2011 11:06:00 AM Peter Blodow did opine: > Hello Gene, > for this reason I am using a plastic cover over the keyboard with > pockets for the keys (left over from delivery of the keyboard) :-)) > :)
> Yes, you are right, the rarer, the more expensive. But I bought my > machine from someone who didn' have a faint idea and I got it together > with the work bench and a drawer type tool cabinet, all filled with > parts, for 50 Euros. Admittedly, you've got to find such a guy, but as I > didn't even intended to buy such a miraculous machine, I learned: Don't > try, and you'll find. As we say, it dropped right into my lap. Damn, I can smell the roses from here. ;) > No, there is no mechanical work that would be impossible for the UWG. On > the Internet, there is a picture of a guy turning out the brake drum of > a large car or truck wheel without even removing the tire. You can do > rigid tapping on a tapered shaft, engrave scale lines on conic wheels, > turn cones, make 45 degree (or any other angle) gears, asymmetrical worm > wheels, hypoid gears and such, both turned and ground. The only thing > that is needed besides a lot of ingenuity is time for the changes on the > machine and for making all those very little chips, because the motor > only has 180 watts :-)) So has my mill. Which is odd as they claim 400 watts, but the motor nameplate says 90 volts, fused at 2 amps. No idea where marketing got that 400 watt figure, but name plates aren't supposed to lie. > Right, there are attachments for circular sawing, a precision turntable > (which I motorized with a stepper), two XY tables in different sizes > with a vise, three chucks, a turning plate, a lot of change gear wheels > for threading, several cardan shafts, a three gear shift box, lots of > pulleys, and a grinding attachment for 20000 rpm (which is lacking on my > machine). You can also disengage the nuts and move the ways by a hand > lever for grinding. All movements are done with 1 mm pitch spindles, > which means an accuracy of 1/400 mm with an ordinary stepper. All nuts > are split to remove any play. And it is very sturdy, as the wei'ght of > 300 kg for a table top machine implies. All important parts are cast > iron, precision ground. The column is a solid 100 mm bar. You can attach > dials on every axis to check precision. But, for a complete change from, > say, turning to rigid tapping I need about one and a half hour. And a very complete understanding of what it is that you are going to do next. > On the > other hand, milling gears, with NC, once the machine is set up, takes > about 10 seconds per tooth. Not at all shabby. When I was making those sprockets a year or so back, a 13 tooth for #35 chain was probably 20 minutes, part of which was changing the way it was attached to the table, starting out with holddown clamps, drilling holes at 90 degree intervals in the web, removing the clamps, installing the screws in the just drilled holes, and then actually cutting the sprocket teeth. For that tooth profile code, all the credit goes to Andy P. But the teeth were about a thou wide due to the backlash in my rotary table. But a few turns with the chain mounted has largely polished that away. They are keeping some all thread synchronized that moves the fence on my bandsaw when I am resawing thin panels for cabinet door inserts and such. > This machine is really a miracle, but not apt for industrial production. > There are rumors that these machines were built in into submarines and > parachuted to the troops in WW II to enable them to produce any > replacement part that was needed for their military gear. All the > machines are numbered, I have the No. 506. I doubt that there were many > more of them produced than about a thousand. Which makes them darned rare in 2011. And that justifies the pricing seen. I should be so lucky as to stumble over a complete one at a flea market for a $100 bill. I would have to be restrained from breaking his hand putting the bill in it. :) OTOH, I know where there is an original Unisaw I could probably have for that same bill, but I haven't room for it, darnit. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Numeric stability is probably not all that important when you're guessing. ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
