New (old) Shop Smith owner

terrydowning · Post by **terrydowning** » Thu Mar 20, 2014 1:08 pm

I work for one of the largest 3D printing Bureaus in the US. And yes the future of rapid manufacturing is definitely 3D printing.

Our layout technicians all require solid geometry skills, we also have CNC Machines and technicians, they all still require a solid understanding of machining different in order to properly program the tool paths. CNC Programming truly is an art.

teacherman · Post by **teacherman** » Thu Mar 20, 2014 2:20 pm

terrydowning wrote:I work for one of the largest 3D printing Bureaus in the US. And yes the future of rapid manufacturing is definitely 3D printing.

Our layout technicians all require solid geometry skills, we also have CNC Machines and technicians, they all still require a solid understanding of machining different in order to properly program the tool paths. CNC Programming truly is an art.

Indeed it is. Sounds like your program is a bit more advanced than ours. But ours has not really started yet, so it's hard to say.

db5 · Post by **db5** » Mon Mar 31, 2014 10:05 pm

teacherman wrote:I just watched the DVD. There is a lot involved there. I may not get to it until summer vacation!
Priorities changed greatly a few weeks ago. The picture will explain it best.

Why did you eliminate 2/3 of the goofy face on the right side of the picture? Now, I'm intrigued. Please post the complete picture of Goofy Face.

teacherman · Post by **teacherman** » Tue Apr 01, 2014 9:03 pm

db5 wrote:Why did you eliminate 2/3 of the goofy face on the right side of the picture? Now, I'm intrigued. Please post the complete picture of Goofy Face.

Trust me, you don't want to see it....... haha

teacherman · Post by **teacherman** » Thu Apr 10, 2014 7:10 pm

I spent my "post-procedure" day off cleaning and re-cording my green 1956 Shopsmith. I cleaned and lubed everything I could reach without a total disassembly, put a 12 gauge power cord on it, and some belt dressing on the belt. It works, and the speed changes when I turn the crank. Sounds surprisingly smooth, really. There seems to be no upper limit to the spindle speed, and I wish I had a tach for it. I bet there is an adjustment to limit the increase. The speed control has a little bit of scraping resistance in spots while cranking it, but the machine seems to work just fine. I believe it has been used very little, as I could find hardly any wear on the metal parts. I will put up some pictures later when I get the chance. A couple of the housing screws are not original, and one hole is stripped out. I believe most of the screws are 10-24, but there are two different sizes. I'm not sure what I think about the way the motor is screwed to the case, but if these things have been working for 60 years, it should be an OK setup. I will have to watch the DVD before I tackle the speed control, but now that I know it works OK, it seems worth it to do so.

Looking forward to seeing what I can do with it. I'll need to get a headstock spur, a drill press vise, and a hold-down clamp for the saw table, and I should be good to go.

JPG · Post by **JPG** » Thu Apr 10, 2014 7:28 pm

There is a high speed 'stop'.

Realize that a 'normal' Mark runs at 5200 rpm at top speed. That is about half again as fast as a typical table saw. Yes it sounds fast!

You would not be the first to question the motor mount. However it really works and is easy to remove.

The motor pan screws were originally 8-32(IIRC) The best fix(IMHO) is to JB weld kep nuts on the inside of the headstock at the screw location.

teacherman · Post by **teacherman** » Thu Apr 10, 2014 9:19 pm

JPG40504 wrote:There is a high speed 'stop'.

Realize that a 'normal' Mark runs at 5200 rpm at top speed. That is about half again as fast as a typical table saw. Yes it sounds fast!

You would not be the first to question the motor mount. However it really works and is easy to remove.

The motor pan screws were originally 8-32(IIRC) The best fix(IMHO) is to JB weld kep nuts on the inside of the headstock at the screw location.

I have to think a while to figure out some of the abbreviations you use. I need to learn more of them, because a fast typist I am not. I was able to turn it past the point where the speed dial said "fast." It kept climbing and it sounded smooth, but it was screaming. Maybe that's normal. Sometimes it shrieks really shrilly as the speed is being increased. Easier to increase speed than decrease, as far as effort applied to the knob. Probably because of the strong spring on the sheave attached to the motor. I'll probably have to disassemble and lube the speed mechanism.....

I spent some time moving things around on it, and I found more things to clean. I feel ready to use the drill press, both upright and flat, the jointer, and the disc sander. I'll not likely use the table saw, as I already have one of those. There are some really neat features on this machine, and lots of fittings to tighten. Thanks for the tip on the keeper nuts!

Next step is the Johnson's paste wax, then to figure out a way to move it around. I can see that it cannot be stationary and fully functional, unless it's in the middle of a large room.

I think this may actually be a well-functioning machine. Switching parts around is a lot less hassle than I thought it would be. There was some real consideration given to its design by some old time engineers with their heads on straight.

JPG · Post by **JPG** » Thu Apr 10, 2014 10:34 pm

The indicator dial is not directly connected to the speed control. It merely keeps track of control knob rotation(gear driven). Last step in 'high speed adjustment is setting that dial to 'fast'. Yours is likely off registration.

Stiff speed reduction is normal. Easy speed increasing is normal. Tis adjusting towards slow that leads to wear problems with the porkchop and the reason for the warning to not turn the dial with the shafts not turning. When adjusting towards slow, the control sheave is squeezing the motor belt. You are correct that the floating sheave must respond to relieve that.

So always adjust towards slow, slowly. Towards fast, let er rip!

IIRC If I Recall Correctly IMHO In my humble Opinion JMHO 'Just" AIUI As I understand It. And I am prone to making some up. TBK Truth Be Known JPW Johnson's Paste Wax SWMBO I'll leave that one fer you to figger out. Close cousin to LOML!

Most are googleable except those I make up.

beeg · Post by **beeg** » Thu Apr 10, 2014 10:53 pm

teacherman wrote:Easier to increase speed than decrease, as far as effort applied to the knob.

Along with the advice to ONLY turn the speed dial while the quill is rotating. Turn the speed dial down slowly to give time for the sheaves to close against the belt.
Reads like ya need to do a high speed adjustment, so here's the instructions for it.

http://www.shopsmith.net/forums/showpos ... ostcount=3

teacherman · Post by **teacherman** » Fri Apr 11, 2014 12:05 am

Thanks! I appreciate the info.

beeg wrote:Along with the advice to ONLY turn the speed dial while the quill is rotating. Turn the speed dial down slowly to give time for the sheaves to close against the belt.
Reads like ya need to do a high speed adjustment, so here's the instructions for it.

http://www.shopsmith.net/forums/showpos ... ostcount=3

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New (old) Shop Smith owner

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