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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Speed control adjustment causes drill motor to stop
I have one of those small bench top drill presses. It stopped starting a while back.
So I figured it's probably all gunked up inside and just needed a good cleaning and lube, at least it's worth a shot. Nope, I got the case open and everything looks good. Turned it on, it started fine. It has an adjustable speed dial, it was set on medium. I touched it and it quit and wouldn't restart. The drill will start with the speed dial at medium or high but not in between, and stops instantly if the speed control is moved when it's running. I expected you could use a speed control to ramp it up and down while it's running but this one doesn't function that way. Is it broken, or are they supposed to do that? |
#2
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Speed control adjustment causes drill motor to stop
On Tue, 8 Nov 2016 05:16:23 -0800 (PST), Tim R
wrote: Is it broken, or are they supposed to do that? Kinda sounds like you're dealing with a bad solder connection or loose connector. Unplug it, tear apart the speed controller, and look for bad solder connections or loose connectors. If you don't feel safe with electricity, kindly resist the temptation to apply power and wiggle the wires. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#3
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Speed control adjustment causes drill motor to stop
On 08/11/16 13:16, Tim R wrote:
I have one of those small bench top drill presses. It stopped starting a while back. So I figured it's probably all gunked up inside and just needed a good cleaning and lube, at least it's worth a shot. Nope, I got the case open and everything looks good. Turned it on, it started fine. It has an adjustable speed dial, it was set on medium. I touched it and it quit and wouldn't restart. The drill will start with the speed dial at medium or high but not in between, and stops instantly if the speed control is moved when it's running. I expected you could use a speed control to ramp it up and down while it's running but this one doesn't function that way. Is it broken, or are they supposed to do that? Mechanical? If it is the type with an intermediate pulley, take both belts off and clean/lubricate the pulley shaft. ALDI Workzone 500w Drill Press unboxing / assembly https://www.youtube.com/watch?v=A6mv4yWklNA Mine (same as vid) gums up with dirt, the pulley jams on the shaft and the motor stalls. Hasn't got electronic speed control, ye have to move belts. Great drill, otherwise. Cost me 25 pounds (UK). -- Adrian C |
#4
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Speed control adjustment causes drill motor to stop
On Wednesday, November 9, 2016 at 5:21:46 AM UTC-5, Adrian Caspersz wrote:
On 08/11/16 13:16, Tim R wrote: I have one of those small bench top drill presses. It stopped starting a while back. So I figured it's probably all gunked up inside and just needed a good cleaning and lube, at least it's worth a shot. Nope, I got the case open and everything looks good. Turned it on, it started fine. It has an adjustable speed dial, it was set on medium. I touched it and it quit and wouldn't restart. The drill will start with the speed dial at medium or high but not in between, and stops instantly if the speed control is moved when it's running. I expected you could use a speed control to ramp it up and down while it's running but this one doesn't function that way. Is it broken, or are they supposed to do that? Mechanical? If it is the type with an intermediate pulley, take both belts off and clean/lubricate the pulley shaft. ALDI Workzone 500w Drill Press unboxing / assembly https://www.youtube.com/watch?v=A6mv4yWklNA Mine (same as vid) gums up with dirt, the pulley jams on the shaft and the motor stalls. Hasn't got electronic speed control, ye have to move belts. Great drill, otherwise. Cost me 25 pounds (UK). -- Adrian C No, not mechanical. No belts, just a motor that speeds up and down incrementally, so I assume some kind of primitive SCR control. |
#5
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Speed control adjustment causes drill motor to stop
Possibly a burned or dirty spot on the control potentiometer.
-- Paul Hovnanian ------------------------------------------------------------------ Ask me about my vow of silence. |
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