Search found 7 matches

by jeff83
Thu Jan 21, 2021 9:26 am
Forum: Maintenance and Repair
Topic: Slow speed calibration
Replies: 3
Views: 698

Re: Slow speed calibration

Thanks! This is just what I needed to know. I won't worry too much about the exact speed, but it was still puzzling me why it was off.
by jeff83
Wed Jan 20, 2021 9:15 pm
Forum: Maintenance and Repair
Topic: Slow speed calibration
Replies: 3
Views: 698

Slow speed calibration

After replacing the quadrant gear, I'm trying to set the slowest speed so it's around 700 RPMs. Right now it's at 900 RPMs. (I know this accurately because I recorded a video clip at a high frame rate and counted 150 turns in 10 seconds.) Anyway, the belt on the upper sheave sticks out *past* the ...
by jeff83
Sun Oct 20, 2019 6:16 pm
Forum: Maintenance and Repair
Topic: Help with slow speed "overshooting"
Replies: 5
Views: 8258

Re: Help with slow speed "overshooting"

Thanks, guys! Yeah, the quadrant gear's teeth are definitely mashed up, though not totally destroyed. I will eventually replace that.
by jeff83
Sat Oct 19, 2019 6:32 pm
Forum: Maintenance and Repair
Topic: Help with slow speed "overshooting"
Replies: 5
Views: 8258

Help with slow speed "overshooting"

On my Mark V, when I crank the speed towards slow, it's now possible to crank right past the "Slow" mark by a significant amount. (The equivalent of almost 3 letters before "A".) This just started happening, I believe right after I accidentally turned it off at high speed and then cranked it back to ...
by jeff83
Sat Jan 27, 2018 10:29 pm
Forum: Maintenance and Repair
Topic: help taking apart motor
Replies: 9
Views: 8656

Re: help taking apart motor

Thank you! Now I understand: "spring thing" = governor.
by jeff83
Sat Jan 27, 2018 9:48 pm
Forum: Maintenance and Repair
Topic: help taking apart motor
Replies: 9
Views: 8656

Re: help taking apart motor

Thanks. I popped the springs off, but I still can't access the slotted screw dead-on because there's still a part in the way (the thing up and to the right of the screw in the picture). I can probably get that part out, but I'd be bending the metal :-/ If I try turning the screw now (from an angle ...
by jeff83
Sat Jan 27, 2018 9:07 pm
Forum: Maintenance and Repair
Topic: help taking apart motor
Replies: 9
Views: 8656

help taking apart motor

I'm trying to take apart the motor on a Mark V that I inherited. I think I need to remove the screw in the picture, but can't get at it because of the spring thing in the way. Any tips? I found helpful videos for tearing down the headstock, but couldn't find anything for taking apart the motor ...