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#1
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Disk sander from scratch
I have an AC motor used as the exhaust fan for a heat pump that I'd
like to use to make a disk sander. The motor is 220 VAC, 1 Amp with a speed of (I think) 1750 RPMs. Problem #1 is that my small shop only has 110 VAC. I've read somewhere that you can run a 220 motor off of 110. If true, how does that affect the current requirements and the running speed. Also, I'll need a starter capacitor. I have the motor's instructions (not with me at the moment) but how do I determine the capacitor ratings for the lower input voltage? Any help is greatly appreciated. Mike |
#2
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Disk sander from scratch
If you have the motor instructions, they will tell you how to re-wire
for 120V if it is possible. Most fan motors are shaded pole with very poor torque characteristics for what you are trying to do. Good luck! Bugs |
#3
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Disk sander from scratch
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#4
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Disk sander from scratch
Well, I have my answer. I hooked up the motor to 110 last night (with
supplied starter capacitor) and got a dismal response. It has so little torque on 110 that I could stop the motor by grabbing the shaft with my bare hands! Looks like I'll either have to find a 110 motor or buy a commercially available disk sander. thanks for you input. |
#5
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Disk sander from scratch
Option #2:
I also wanted a larger disc sander. Saw in Price Cutter Catalog a 10 " sanding plate that replaces the saw blade in a 10" table saw! Not wanting to mess up my table saw, checked frequently on Craigs List (or classified) and found a really cheap bench top 10 " saw for $25.00.Bought it and the Price Cutter adapter. With a little ingenuity, converted the fence with a 15" x 10" piece of scrap wood. Hooked up the sander plate, slid the board against it to make a safety cover. Then permanently mounted the board to the fence with screws.Cut a hole in the back of the saw to match my shop vac and now have a nice little "tabletop bench sander"! As the saw motor runs at 4800 rpm (PDF for a sander), I installed a HF Router speed controller and adjust speed to the job.I also added a homebrew small downdraft sanding table to the other side. The whole thing "ain't pretty", but for about $65.00, I have a neat little setup that works great. If Interested ,I can post pics at ABPW. Bill "Mike" wrote in message oups.com... Well, I have my answer. I hooked up the motor to 110 last night (with supplied starter capacitor) and got a dismal response. It has so little torque on 110 that I could stop the motor by grabbing the shaft with my bare hands! Looks like I'll either have to find a 110 motor or buy a commercially available disk sander. thanks for you input. |
#6
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Disk sander from scratch
Please post your pics. I'm sure others might be interested in your
setup, too. mike |
#7
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Disk sander from scratch
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#8
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Disk sander from scratch
Yes, I've a table saw but don't really want to mess with a converter.
At this point I've got 3 options: 1. buy a commercial disk sander, 2. buy a suitable motor and build one (my woodworking mags have a plan), 3. buy a cheap table-top saw and go the route suggested by you and Bill Hall (msg 5, above). I'm glad you mentioned your experience with the drill attachment. Was wondering if my variable-speed 1/2" drill would have enough power and speed. |
#9
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Disk sander from scratch
Mike:
Posted the series of pics at ABPW. If they came through!! Still using this set-up and works well for an inexpensive approach. Bill "Mike" wrote in message oups.com... Please post your pics. I'm sure others might be interested in your setup, too. mike |
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