Wohlhaupter UPA-4 push button issues
06 Feb 2018 15:10 #105494
by tecno
Wohlhaupter UPA-4 push button issues was created by tecno
I have one UPA-4 that has been in storage for a while and now I have issues with the 12 push buttons that will not release.
These buttons have been pushed in and been so for some years (I have never used this head yet!)
Have been following manual but I get no response at all, does anybody here have a UPA-4 that might have tips and tricks for the boring head?
Grateful for any assistance I can get.
Cheers
Bengt
These buttons have been pushed in and been so for some years (I have never used this head yet!)
Have been following manual but I get no response at all, does anybody here have a UPA-4 that might have tips and tricks for the boring head?
Grateful for any assistance I can get.
Cheers
Bengt
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06 Feb 2018 15:57 #105496
by Todd Zuercher
Replied by Todd Zuercher on topic Wohlhaupter UPA-4 push button issues
Have you tried giving it a good cleaning and soaking it in penetrating oil?
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06 Feb 2018 16:09 #105497
by tecno
Replied by tecno on topic Wohlhaupter UPA-4 push button issues
Ongoing soaking, was a bit *stiff* but all parts moving except the release ring for the buttons.
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06 Feb 2018 18:24 - 06 Feb 2018 18:25 #105500
by tecno
Replied by tecno on topic Wohlhaupter UPA-4 push button issues
Last edit: 06 Feb 2018 18:25 by tecno.
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08 Feb 2018 13:15 #105566
by tecno
Replied by tecno on topic Wohlhaupter UPA-4 push button issues
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08 Feb 2018 13:31 #105567
by andypugh
Replied by andypugh on topic Wohlhaupter UPA-4 push button issues
I have a slightly different UPA4. It is the most beautifully-made thing I have ever handled.
Mine has pairs of pins with their axis along the spindle axis. The pairs are coupled with tiny gears, so that when you push one down the other pops up.
I also have a UPA3 which I use extensively.
I even have a _CNC_ UPA3:
Mine has pairs of pins with their axis along the spindle axis. The pairs are coupled with tiny gears, so that when you push one down the other pops up.
I also have a UPA3 which I use extensively.
I even have a _CNC_ UPA3:
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08 Feb 2018 13:36 #105569
by tecno
Replied by tecno on topic Wohlhaupter UPA-4 push button issues
Wow,that is interesting. Something you have made your self?
I also have a modern 236 set with ISO40 taper = I like it very much.
I also have a modern 236 set with ISO40 taper = I like it very much.
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08 Feb 2018 13:45 #105571
by andypugh
Replied by andypugh on topic Wohlhaupter UPA-4 push button issues
The CNC adaptor was an experiment. (It should fit any changeable-shank UPA3) but wasn't 100% successful.
I should try it again using the STMBL drive instead of the 7i33.
The main problem with it was the internal home-made encoders. But also the design of the hand-wound 100% custom motor could probably be improved.
I should try it again using the STMBL drive instead of the 7i33.
The main problem with it was the internal home-made encoders. But also the design of the hand-wound 100% custom motor could probably be improved.
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08 Feb 2018 13:57 #105573
by tecno
Replied by tecno on topic Wohlhaupter UPA-4 push button issues
I am intrigued of such engineering. Have no need for such tooling now but who knows what i might need in the future.
So, keep up the good work!
So, keep up the good work!
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10 Feb 2018 11:51 #105698
by tecno
Here are the pins, they are badly worn in the end that connects to the star wheel.
Have contacted Wohlhaupter in Germany to hear if they have spare parts to reasonable price.
3-4 out of 12 are OK.
Now all parts cleaned and greased/oiled awaiting final assembly with new pins.
As I see it the main reason to the faulty behavior is lack of grease and oil.
Replied by tecno on topic Wohlhaupter UPA-4 push button issues
Here are the pins, they are badly worn in the end that connects to the star wheel.
Have contacted Wohlhaupter in Germany to hear if they have spare parts to reasonable price.
3-4 out of 12 are OK.
Now all parts cleaned and greased/oiled awaiting final assembly with new pins.
As I see it the main reason to the faulty behavior is lack of grease and oil.
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