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The Frankensander Breathes!!!

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Forum topic by Gene Howe posted 10-29-2011 10:05 PM 1251 views 0 times favorited 8 replies Add to Favorites Watch
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Gene Howe

8239 posts in 2889 days


10-29-2011 10:05 PM

The treadmill is dead. Long live the Frankensander!
Tore the old tread mill apart. Threw out the parts not needed, rerouted the wiring, shored up the bed and got a hands on lesson in the operation of Reeves pulleys.
Re wired the motor power cord and disconnected the pulse monitor.
Plugged it in and it runs!!!!
Now, I’ve got to engineer a lead screw to adjust the motor carriage that will give me speed control. I may try to rig up a similar set up to adjust the powered platen for belt tracking. Then weld on some legs and order some belting. It takes a 14X”105” belt, so I’ll have to order a longer one, cut it and re splice it. Anybody got any suggestions on the kind of glue I should use?
So far, this has been fun!

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton


8 replies so far

View Loren's profile

Loren

8295 posts in 3109 days


#1 posted 10-29-2011 10:50 PM

I think you should be able to get sanding belts made up for
you in custom lengths. I was looking into a while back and
it seemed there are width limitations, but custom lengths can
could be got in lots of 3 or more belts.

I’ve been considering converting my Woodmaster 12” drum
sander into a wide belt. Seems to me all I need is to rig up
an idler on top with a tensioning mechanism and it should
work.

The FineWoodworking book on Making and Modifying Machines
has an article in it about 2 luthiers who got into making
a belt sander for thicknessing instrument parts in the late
70s.

View Arlin Eastman's profile

Arlin Eastman

3550 posts in 2022 days


#2 posted 10-30-2011 12:50 AM

Klingspor’s has lots and lots of that kind of stuff. Here is a like to their site.

http://www.woodworkingshop.com/

Arlin

-- Please help me help other Vets click..> http://www.gofundme.com/m1abko.....It is always the right time, to do the right thing.

View EEngineer's profile

EEngineer

1061 posts in 3074 days


#3 posted 10-30-2011 01:15 AM

Pictures! I would love to see pictures.

I have thought about this a long time. It’s just that no one has donated a treadmill yet. But my thoughts were more towards using the treadmill as a feeder into a large drum sander, not to mount the sandpaper to the treadmill.

Most of the treadmills I’ve seen have a DC motor and an electronic speed control. Did yours have the Reeves pulley on it or did you retrofit that?

-- "Find out what you cannot do and then go do it!"

View Gene Howe's profile

Gene Howe

8239 posts in 2889 days


#4 posted 10-30-2011 01:44 AM

Loren and Arlin, Thanks guys. Got the belt material covered at “2sand dot com”. Can’t use a continous belt as the platens set in a solid frame. Gotta thread the belt then glue it together on the machine. “2sand dot com” won’t sell me a length, they’ll only sell a belt. So I will order a longer one and cut it. They are cheap, for the size.

EEngineer, This one is A/C. The Reeves was the method of speed control. The motor and carriage rides on two steel rods. The carriage moves to loosen or tighten the belt, activating the Reeves mechanism. I need a more positive method to move the carriage than the cable method used on the treadmill. A couple of nuts, some welding, and a length of threaded rod with a shop made knob should do the trick.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View Gene Howe's profile

Gene Howe

8239 posts in 2889 days


#5 posted 10-30-2011 02:29 PM

With any luck, I’ll have pictures this evening.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View Gene Howe's profile

Gene Howe

8239 posts in 2889 days


#6 posted 10-31-2011 12:27 AM

The Frankensander. Just in time for Holloween

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View EEngineer's profile

EEngineer

1061 posts in 3074 days


#7 posted 10-31-2011 04:39 AM

That is cool! Better built than most of the treadmills I have seen…

A few suggestions, hope you don’t mind…
1. I’d be flipping the motor mount upside down on the chrome tubes that it slides on and change to a longer drive belt. This would leave unobstructed space for stock so you could sand longer pieces.
2. I’d cut off the column mount… same reason.
3. That’s a really sturdy looking angle-iron frame. It shouldn’t be too hard to build a base under this to raise it to working height.
4. I notice the sensor next to the driven pulley on the belt. Seems to me it wouldn’t take too much to make that into a speed sensor for an indicator of belt speed. It is what I do for a living (I design those sensors). Let me know if you need help with that as things progress.

I tell you, that is one industrial looking piece of equipment. Color me green with envy. Please keep us informed as you progress.

-- "Find out what you cannot do and then go do it!"

View Gene Howe's profile

Gene Howe

8239 posts in 2889 days


#8 posted 10-31-2011 12:57 PM

Wow! Is that what that little black thing is? There’s a magnet on the drive Pulley, too.
Some where along the line, the wire was disconnected and I couldn’t see where/what it was supposed to connect to. Probably ran up to an indicator on the control pedestal, which I removed.
I can’t see where I’d need to know how fast it’s going. It’s a 1725 rpm motor. Once I get the speed where I want it, I’ll lock the carriage in place. I’ll still have the ability to adjust the carriage position for differing speeds, though. Gotta love Reeves Pulleys. (see my avatar)
Yeah, it’s heavy duty. I have a bunch of 2X4 steel tubing left over from a steel shed build. I’ll be using some of that for a base. I also have the rotating pedestal that spanned the frame. It’s made from the same material as the frame. Hate to toss it. Anyway, that’s the next step. Gonna weld some locking wheels on at least two of the stand legs.
As far as length of the work goes, it’s 50” between the plattens, now. Of course, bigger is always better (size does count, sometimes) but, I cant see me needing any more length. The other end is unobstructed, and that’s the direction of the belt rotation.
Thanks a lot for your suggestions and offer of help. I will be taking you up on it!

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

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