Has anyone used an OLD BOX FAN MOTOR for any DIY projects?

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Has anyone used an OLD BOX FAN MOTOR for any DIY projects?
Reply:I made a fume extractor out of one....It worked pretty good until my buddy threw..... throw....chucked (why does "threw" look so weird to me)....chucked a m80 in from outside and blew it apart. Nice way to say hello when coming over huh. took the fan and made a box for it, a little flexible duct work out the side of the garage with a louvered door that opened when it was on...Miller blue star 2eLincoln 175
Reply:Actually, I used the whole fan.  I mounted four long machine screws on the output side, as legs, so that the airflow was top/down, which was crucial.  I then took some aluminum flashing and taped it into a circle slightly larger and higher than the fan,also crucial.  In this orientation, the solid center of the fan blades was on the top side. I then took some double-sticky foam tape, and put a 1" square right in the middle.  I hooked the fan up to a small variac with a foot switch, and put the ring around the motor, all of which was on my lab bench. The purpose of the exercise was to put photoresist on silicon wafers for some experiments I was doing.  By (VERY) carefully centering the wafer on the sticky-foam, testing it at very low speeds first, I was able to safely get the wafer to higher and higher speeds, eventually to the full speed of the fan.  At that point, I took an eye-dropper of photoresist and did the old spin-art trick.  If the coating didn't come out the way I wanted it to, I would run the wafer up to speed, and take an acteone squirt-bottle to remove it with just a few drops, and try again.  It worked beautifully for as long as I needed it.  I would occasionally have to clean the accumulated resist from the fan plenum as it built up from the down-draft.  The aluminum blast-shield caught the rest.  I suppose it would make a quick 'n dirty spin art toy for kids, but I wouldn't give them snything dangerous as a substrate. When one of the wafers let go it turned into a Frisbee until it hit the closest object and shattered into hundreds of sharp pieces.  ;8->
Reply:Originally Posted by KraftymateHas anyone used an OLD BOX FAN MOTOR for any DIY projects?
Reply:Originally Posted by WeldordieWhat is a box fan?
Reply:Wow, that's crazy, I work with silicon wafers but we use muti-million dollar equipment to deposit the photoresist, all computer controlled and automated, when it's actually working that is...Do you have any way to measure the film properties afterwards? Are you making something or just playing around?  Originally Posted by Rick BeckerActually, I used the whole fan.  I mounted four long machine screws on the output side, as legs, so that the airflow was top/down, which was crucial.  I then took some aluminum flashing and taped it into a circle slightly larger and higher than the fan,also crucial.  In this orientation, the solid center of the fan blades was on the top side. I then took some double-sticky foam tape, and put a 1" square right in the middle.  I hooked the fan up to a small variac with a foot switch, and put the ring around the motor, all of which was on my lab bench. The purpose of the exercise was to put photoresist on silicon wafers for some experiments I was doing.  By (VERY) carefully centering the wafer on the sticky-foam, testing it at very low speeds first, I was able to safely get the wafer to higher and higher speeds, eventually to the full speed of the fan.  At that point, I took an eye-dropper of photoresist and did the old spin-art trick.  If the coating didn't come out the way I wanted it to, I would run the wafer up to speed, and take an acteone squirt-bottle to remove it with just a few drops, and try again.  It worked beautifully for as long as I needed it.  I would occasionally have to clean the accumulated resist from the fan plenum as it built up from the down-draft.  The aluminum blast-shield caught the rest.  I suppose it would make a quick 'n dirty spin art toy for kids, but I wouldn't give them snything dangerous as a substrate. When one of the wafers let go it turned into a Frisbee until it hit the closest object and shattered into hundreds of sharp pieces.  ;8->