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+--- Thread: Todays Project - What did you do today? (/thread-727.html)
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RE: Todays Project - What did you do today? - stevec - 01-20-2013
Great work Willie, you're gonna love it. I don't think I'd be able to lift my knee with a handwheel (unles it was huge) but (gloat, gloat)
My Tree 2UVR came with a power knee lift (Another reason I love my mill).
Here's a pic of the crank disengaged.
[attachment=4291]
Here's one engaged by pushing in.
[attachment=4292]
Here's one of the power feed engaged (knurled ring pulled out).
[attachment=4293]
crank is disengaged
The drum switch handles the up-off-down control.
RE: Todays Project - What did you do today? - DaveH - 01-20-2013
Willie,
I see you have been busy
Nicely done 
DaveH
RE: Todays Project - What did you do today? - sasquatch - 01-20-2013
Yup, older we get the more we get aching knees and creaking backs!!
RE: Todays Project - What did you do today? - Highpower - 01-20-2013
Not fair Steve, you've got a real mill there!
Well, I knew things were going too smoothly and something was going to happen.
I went to button up the drive unit today and decided to try cranking the knee up and down by hand first before applying power to the feed. Going up a good distance using the hand wheel was a little awkward but do-able. I decided to leave the crank handle off of the hand wheel because I know I would only end up getting stabbed by it.
Then I tried cranking the knee down and after several turns on the wheel I heard a POP and noticed that a gap appeared between the drive housing and the dial ring. Uh oh..... So I took it all apart again to have a look.
All of a sudden now I can move the shaft in and out through the bearing housing on the knee and hear it going clunk, clunk. I put an indicator on it and found .0123" of end play in the shaft.
![[Image: th_Z_Shaft_End_Play.jpg]](http://smg.photobucket.com/albums/v82/Highpwr/Knee%20Power%20Feed/?action=view¤t=Z_Shaft_End_Play.jpg)
At first I thought maybe the shaft had hung up in the bearing bore and the thrust collar didn't get seated against the bearing when I put it back together. I tried to tighten up the extension shaft to pull the jack shaft out further, but they didn't move. On closer examination I found the bearing was sliding back and forth in the housing! Too much clearance between the bearing spacer and the snap ring that retains them in the housing.
![[Image: Knee_shaft.jpg]](http://img.photobucket.com/albums/v82/Highpwr/Knee%20Power%20Feed/Knee_shaft.jpg)
I guess I should have left that bearing rusted in place instead of cleaning and repacking it. Sigh....
Oh well. Added a shim under the bearing so that the snap ring is a tight fit against it now, and eliminated the end play in the shaft. Now I get to start all over again adjusting the drive gear backlash on the power feed - tomorrow.
RE: Todays Project - What did you do today? - stevec - 01-21-2013
Sounds like a long road Willie! Hang in there, we have faith in you.
RE: Todays Project - What did you do today? - Mayhem - 01-21-2013
At least you are heading in the right direction Willie. Besides, it could be much worse...
RE: Todays Project - What did you do today? - Highpower - 01-21-2013
(01-21-2013, 08:04 AM)Mayhem Wrote: Besides, it could be much worse...
You are absolutely right about that Darren.
Cast iron and a sudden loud POP are two things that usually don't end well when they are together in my experience. For that matter, even a little 'tink' sound is not good either.
(All the welders in the group are cringing right now...)
Believe me, I was expecting much worse when I heard it....
RE: Todays Project - What did you do today? - Highpower - 01-24-2013
Still need to attach the limit switch and the rail/stops on the knee/column, but at least it is on there and working.
![[Image: th_Z_Power_Feed.jpg]](http://smg.photobucket.com/albums/v82/Highpwr/Knee%20Power%20Feed/?action=view¤t=Z_Power_Feed.jpg)
RE: Todays Project - What did you do today? - EdK - 01-25-2013
Nice job Willie. It looks better than factory installed.
Ed
RE: Todays Project - What did you do today? - TomG - 01-25-2013
Nice job Willie, but what are you going to do for exercise now that you don't have to crank the knee up and down?
Tom