macona
Diamond
- Joined
- Jun 20, 2006
- Location
- Beaverton, OR
In the past couple nights I have gotten to know my 42 EE rather well. Had the wrong drive belts installed (B series, not A), feed belt idler bearing were dry, motor noisy. Got those problems fixed and noticed a rythmic clunking sound from the lathe with the spindle running. Traced it down to the gearbox. Ended up pulling the gearbox to find the idler gear that engages the stack of threading gears had at some time been jammed into gear and one of the teeth had been flattened a bit making the tooth wider. 6 hours later... All back together and running quietly and very smooth. Still need to replace the feed drive rod. Looks like it has a slight bend in it and it is galled a bit where it goes into its support block.
Yesterday I decided to tackle one of the remaining problems. Did an oil change. The thing runs faster in reverse than forward. Started out finding that they had replaced a screw in the AP relay jamming it closed . Fixed that and adjusted it as well as I could. Now will brake to slow before reversing.
Spent the next couple hours trying to figure out the speed problems. All voltage seem OK. Eventually it hit me, Timing!. I saw there was a bolt to clamp the brush adjustment. Went to loosen it and it was already loose. Argh! I adjusted it to a point where it seems to be equal in both directions.
Now for my remaining problem. Someone has screwed around with the FA relay and I dont know how to adjust it. Its taking forever to come up to speed with the FA relay kicking in at above base speed. There are three screws, One for spring tension, one for contact separation and one that controls travel. How should I set these? I had it working pretty well last night. (About 5 seconds to come up to full speed, 2500 RPM) and this morning it wouldnt come up the AF relay was coming in past base again. I do have a DC clamp type amp meter.
How fast should the spindle come up to speed? It will go from full speed to stop in about 3 seconds.
Last but not least my exciter voltage seems to be around 129v. Seems rather high. I think this is causing the machine to run faster than it should (It easily goes past to 2500 mark on the tach) Could this be causing some of my troubles? More voltage = more current = FA relay pulling in easier.
Yesterday I decided to tackle one of the remaining problems. Did an oil change. The thing runs faster in reverse than forward. Started out finding that they had replaced a screw in the AP relay jamming it closed . Fixed that and adjusted it as well as I could. Now will brake to slow before reversing.
Spent the next couple hours trying to figure out the speed problems. All voltage seem OK. Eventually it hit me, Timing!. I saw there was a bolt to clamp the brush adjustment. Went to loosen it and it was already loose. Argh! I adjusted it to a point where it seems to be equal in both directions.
Now for my remaining problem. Someone has screwed around with the FA relay and I dont know how to adjust it. Its taking forever to come up to speed with the FA relay kicking in at above base speed. There are three screws, One for spring tension, one for contact separation and one that controls travel. How should I set these? I had it working pretty well last night. (About 5 seconds to come up to full speed, 2500 RPM) and this morning it wouldnt come up the AF relay was coming in past base again. I do have a DC clamp type amp meter.
How fast should the spindle come up to speed? It will go from full speed to stop in about 3 seconds.
Last but not least my exciter voltage seems to be around 129v. Seems rather high. I think this is causing the machine to run faster than it should (It easily goes past to 2500 mark on the tach) Could this be causing some of my troubles? More voltage = more current = FA relay pulling in easier.