Duck Pond Redneckery


Projector screen winder upper thingy.

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6000 RPM has a reduction drive, output shaft is 80 RPM.

I knew I wasn't gonna git everything in perfect alignment so I made a drive shaft with U-joints.

The spool is a 143" piece of 2" electrical conduit, covered with heat shrink to make it grippy.

The other end is a piece of walnut I cut on the lathe to fit inside the pipe and connect to a 1/2" bearing in an oak bearing block.

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Power end only has thrust bearings, as no regular bearing is needed where a smooth shaft spins in high density polyethylene. The black thing holding the end of the screen spool is HDPE.
 
The control box contains the guts from a 12 volt laptop power supply, and a DPDT polarity reversing switch.

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The inside of the lid for the plastic box had a raised X in it. I needed it flat for the switch.

So using an old router bit, I used my drill press as a milling machine. 3600 RPM. To get really precise with the depth, I didn't touch the lever that lowers the bit. Instead I cranked the handle that raises & lowers the platform.

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I have 2 of those 80 RPM motors. I was using the spare to test the power/control box because the other one was 13 feet up on the wall.

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Dimensions of the screen, which is like white t-shirt fabric.

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Funny...I made the spool 143" long so I'd have extra pipe on the sides.

But by the time I pulled the wrinkles out of the screen, it was only two inches shorter than the pipe.

So 130.7 inches is actually 141 inches.
 
You are just sofaking bored. :rolllaugh: Come be me, stuck in the house getting my back worked on and straightened out.

We used to have the projector screens that you pulled down and they locked and then retracted when I was a kid.

The kids that kissed the teachers butt ran the projector. I only had 1 or 2 teachers that I would have liked to kiss their butts. The rest were older than I am now. The difference is, we learned.
 
You are just sofaking bored. :rolllaugh: Come be me, stuck in the house getting my back worked on and straightened out.

We used to have the projector screens that you pulled down and they locked and then retracted when I was a kid.

The kids that kissed the teachers butt ran the projector. I only had 1 or 2 teachers that I would have liked to kiss their butts. The rest were older than I am now. The difference is, we learned.
It took almost a year to complete that project. I kept forgetting about it.

I've got like 8 unfinished projects.

And parts for projects I ain't even planned yet.
 
You are just sofaking bored. :rolllaugh: Come be me, stuck in the house getting my back worked on and straightened out.

We used to have the projector screens that you pulled down and they locked and then retracted when I was a kid.

The kids that kissed the teachers butt ran the projector. I only had 1 or 2 teachers that I would have liked to kiss their butts. The rest were older than I am now. The difference is, we learned.
remember them glass things you sat in front of the tv and it made the picture look bigger:confused-96:
 

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