Evanism
7th December 2014, 02:31 AM
Started doing a big turning tonight and noticed the digital readout was showing 0 rpm....
Weird, it was working last week and the lathe is running perfectly fine.
The dudes it was purchased from are closed tomorrow, so I thought to harness the wisdom of the crowd to see if anyone knows a fix.
I looked inside the casing. Next to the shaft is a small device with a LED. It sits very close to four screws that are concentricly placed around the shaft. I've seen this in action before...it blinks as one of the screws passes it, so perhaps it's magnetic(?). Now, it is still lit, but doesn't blink.
I cleaned the shaft, blew out all the dust, cleaned the small device, cleaned the pully too... It has a small dimple drilled into it that the LED just happens to shine in/on, but it's a good three inches from the "reader". Perhaps the unblinking LED is an interferometer that uses the dimple somehow?
Anyway, after a good clean it displayed wildly fluctuating numbers for 30 seconds when I set it to 300 rpm. I know it's 300 rpm as I use it all the time. The motor was rock steady in its rpm but the reading heaved 56.... 370.... 120....200....75.....300... And so it spasmed. Then the numbers completely died and displays only 0.
Has anyone ever experienced such a thing? Or know a fix?
Anyone know the warranty is on the beast?
It's not a show stopper as I do the rpm by ear, like everyone, but it sure is nice to see them....plus I'd hate to think this might be the beginning of the end for the "computer" if it's out of bloody warranty.
Weird, it was working last week and the lathe is running perfectly fine.
The dudes it was purchased from are closed tomorrow, so I thought to harness the wisdom of the crowd to see if anyone knows a fix.
I looked inside the casing. Next to the shaft is a small device with a LED. It sits very close to four screws that are concentricly placed around the shaft. I've seen this in action before...it blinks as one of the screws passes it, so perhaps it's magnetic(?). Now, it is still lit, but doesn't blink.
I cleaned the shaft, blew out all the dust, cleaned the small device, cleaned the pully too... It has a small dimple drilled into it that the LED just happens to shine in/on, but it's a good three inches from the "reader". Perhaps the unblinking LED is an interferometer that uses the dimple somehow?
Anyway, after a good clean it displayed wildly fluctuating numbers for 30 seconds when I set it to 300 rpm. I know it's 300 rpm as I use it all the time. The motor was rock steady in its rpm but the reading heaved 56.... 370.... 120....200....75.....300... And so it spasmed. Then the numbers completely died and displays only 0.
Has anyone ever experienced such a thing? Or know a fix?
Anyone know the warranty is on the beast?
It's not a show stopper as I do the rpm by ear, like everyone, but it sure is nice to see them....plus I'd hate to think this might be the beginning of the end for the "computer" if it's out of bloody warranty.