How did you make the rotating joints? The way I've done it is to use bushing and screws. I don't have a reamer so my bushing is loose which gives a loose joint. I tried screws but got the same result. Does it even matter once the motor kicks in? I.E the weight keeps the cutting blade true?
@fupersly The joint bearings are pieces of nylon from an old cutting board. The shafts are 1/2" steel tubing, I took a piece of the tubing and cut teeth into it with a dremal cutoff tool. I mounted that in a drill press and used it to drill the holes in the nylon blocks. perfect fit
@riffraff60 I think I get it. The weight of the shaft is not supported by the nylon? You turned the shaft into a screw I guess and screwed the nylon onto either end like a cap?
I see you have a fan cooling the wiper motor. I have built a CNC machine using 3 wiper motors and also concerned about how warm the motors get. I tested one by leaving it running for about 1/2 an hour and it got equally warm. I have to assume that they actually do operate at a "hot enough so you can't hold it for long" temperature.
Is your machine still working? If not what failed?
Has play developed on the screw gear inside the wiper motor?
@SoundsLikeOdie, still works, i don't use it that much however. No play yet. I'm sure there will be sooner or later. Frankly I built it more to build it then to use it. :) The fan does keep the wiper motor cooler, it might run fine without it, but why risk it.
@voidmansions Needed the bit to be about 1/8 inch shorter to clear a part in the lathe, worked well actually, the shank ends of these cheap Chinese bits don't seem to be hardened and I was using 4 for a buck blades. It's not a wheel chair motor, it's a windshield wiper motor. It's a kludge, but it works.
A windshield wiper motor? Lol, I knew I recognized that sound and rhythm! Sounds like my old 1980 Ford pickup truck in a rainstorm. :-)
apatientspider 2 months ago
Wow, you're cutting a drill bit with a hacksaw? No wonder it's slow, drill bits are hardened, probably almost as hard as the hacksaw blade.
That would probably work great on soft steel.
junekentucky 5 months ago
How did you make the rotating joints? The way I've done it is to use bushing and screws. I don't have a reamer so my bushing is loose which gives a loose joint. I tried screws but got the same result. Does it even matter once the motor kicks in? I.E the weight keeps the cutting blade true?
fupersly 6 months ago
@fupersly The joint bearings are pieces of nylon from an old cutting board. The shafts are 1/2" steel tubing, I took a piece of the tubing and cut teeth into it with a dremal cutoff tool. I mounted that in a drill press and used it to drill the holes in the nylon blocks. perfect fit
riffraff60 6 months ago
@riffraff60 I think I get it. The weight of the shaft is not supported by the nylon? You turned the shaft into a screw I guess and screwed the nylon onto either end like a cap?
fupersly 6 months ago
This is brilliant. Thanks for posting the video.
I see you have a fan cooling the wiper motor. I have built a CNC machine using 3 wiper motors and also concerned about how warm the motors get. I tested one by leaving it running for about 1/2 an hour and it got equally warm. I have to assume that they actually do operate at a "hot enough so you can't hold it for long" temperature.
Is your machine still working? If not what failed?
Has play developed on the screw gear inside the wiper motor?
SoundsLikeOdie 1 year ago
@SoundsLikeOdie, still works, i don't use it that much however. No play yet. I'm sure there will be sooner or later. Frankly I built it more to build it then to use it. :) The fan does keep the wiper motor cooler, it might run fine without it, but why risk it.
riffraff60 1 year ago
Seems to me like it does exactly what it was built for ....cutting might be slow but it saves getting cramp in the arm .Nice one
tarmacdemon 1 year ago
Well using a dc motor from a wheelchair certainly saves on parts, but I doubt you'll have much teeth left if you start sawing an HSS dril bit!
voidmansions 1 year ago
@voidmansions Needed the bit to be about 1/8 inch shorter to clear a part in the lathe, worked well actually, the shank ends of these cheap Chinese bits don't seem to be hardened and I was using 4 for a buck blades. It's not a wheel chair motor, it's a windshield wiper motor. It's a kludge, but it works.
riffraff60 1 year ago
Totally Awesome!
nonamenowwhat 2 years ago
Cool, I guess you found a use for that fan after all.
TitaniumSpine2007 2 years ago