Todays Project - What did you do today?

[PixMan]

(12-05-2013, 08:49 PM)f350ca Wrote: My Logan shaper has always been noisy, REALLY noisy, checked a couple of U-Tube videos and the ones on there are nice and quiet. Was pretty sure the belt drive was the problem, tore it apart and found that the double pulley that varies the ratio was made of some hard plastic, maybe a phenolic judging from the age of the machine. The centre section was cast in two parts but they'd separated and came loose from the bronze bushing that they were to slide sideways on. The bushing could walk over to the side and one of the halves was almost unsupported, and the centres had worn to where they flopped around on the bushing.
The parts listing shows this as an assembly but if someone put it together i should be able to take it apart. Getting it back together is the problem some times.
The side pulley halves ended up being pinned and glued to the hollow centre shaft. The needle bearing it rides on had to be removed to drive the pins through, (new one coming tomorrow, dented the edge trying to get it out), with the pins out used a bearing splitter and a puller to shear the glue joint. Sorry no pictures, my bad forgot.
With it apart I made a new bushing with a larger OD, then bored the centre parts for a sliding fit to the bushing.

Washed it down with acetone then glued the centre together with 2 part epoxy, then installed the end , the halves had to be indexed to fit into the sides.

Hopefully the new bearing will be in tomorrow and we'll have a quiet machine.

I'm just wondering why it looks like the pulley halves should have had the "teeth" interlocked. The pulley now looks like it's a "sharp V" pulley, not very common. Any reason why you wouldn't have been better off to just make solid pulleys out of aluminum or some other material?

Otherwise, looks like a really good job done!

[Mayhem]

Nice work Ken (as usual). Good to see you have another project where the drawing is in metric

[PixMan]

Yeah, the only problem with it is that I can't do the metric threads on my lathe because it didn't come with the change gears. I need a 70 tooth gear, and even if I had it it would be a big PITA to change them. I'd have to pull the collet closer assembly off the back of the spindle to be able to open the door on the end of the machine to change it. I did pull if off once before just to look for the gear and it took me almost 40 minutes to get the notched disk indicating true again.

If I could find a way to get the YAM CNC lathe that Russ is gifting me into the shop I'd be able to thread anything. I may have to wait until I clear space in my own home's cellar, upgrade to 200 amp electrical service and move the whole shop out here to Spencer.

[f350ca]

The teeth are aligned to interlock as the centre section slides sideways. This assembly is mounted on an arm that moves it up and down between two fixed pulleys. As its brought up the belt coming from the motor is pulled into the grove forcing the centre section to the left , this causes the belt path on the left to narrow, bringing the belt out to an effective larger dia, while the right dis gets smaller. Similar to the variable drive on a milling machine only using two belts and giving a wider speed range. My Rockwell wood lathe has a similar drive with aluminium shives, it runs very quiet.

[Mayhem]

(12-07-2013, 11:51 PM)PixMan Wrote: ...If I could find a way to get the YAM CNC lathe that Russ is gifting me into the shop I'd be able to thread anything. I may have to wait until I clear space in my own home's cellar, upgrade to 200 amp electrical service and move the whole shop out here to Spencer.

That sounds like a plan to me. Happy to help with the move if I'm in the US at the time. I tend to be pretty well situated in Auburn

[dallen]

added a sight glass to the furnace fuel tank so I can tell how much is in it.

[dallen]

worked on this part for I think (which gets me in trouble) a 57 Chevy. first to guess what it is buys dinner.

[stevec]

I know exactly what it is but I'm not sayin' I don't wanna get stuck for dinner. It's not actually the dinner I can't afford it's the travel.

[dallen]

lets see who else may know, I'll let you off the dinner cause of the travel that and I don't like canadian winter

[chucketn]

Steering wheel adapter?
And you deliver dinner...

Chuck