 Homemade 2L TPS, Just for Fun |
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| Highland |
 Jul 13 2024, 06:52 PM
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#1
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Senior Member  Group: Members Posts: 529 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California  |
Just thought I'd share:
Parts are printed, but are rotating on pressed in plain bearings.    |
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| emerygt350 |
Jul 14 2024, 04:43 AM
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#2
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Advanced Member Group: Members Posts: 2,504 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
That is pretty cool! How do you handle the shut off on reverse rotation?
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| JeffBowlsby |
Jul 14 2024, 08:17 AM
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#3
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914 Wiring Harnesses Group: Members Posts: 8,764 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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Do I understand correctly...a roller contact not a sliding wiper?
Genius. No friction or parts that wear out. |
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| 914Sixer |
Jul 14 2024, 08:25 AM
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#4
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914 Guru Group: Members Posts: 9,026 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Love it when members continue to ONE UP the factory part and make it simple (IMG:style_emoticons/default/first.gif)
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| Highland |
Jul 14 2024, 11:43 AM
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#5
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Senior Member Group: Members Posts: 529 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California |
QUOTE(emerygt350 @ Jul 14 2024, 03:43 AM)  That is pretty cool! How do you handle the shut off on reverse rotation? The roller contact is Mill-Max 0945-0-15-20-09-14-11-0. Like OEM, the primary means of preventing reverse rotation contact is gravity and inertia. Between the 2 arms are magnets placed same polarity facing each other. This provides opposing force for roller contact and are offset to prevent any contact during reverse rotation. I wish I could publish some fancy calculation to determine the optimum magnet offset, but it was trial and error until I could get something that worked reliably. Not to hard with inexpensive rapid prototyping of a home 3D printer. I'm testing this on a '73 TB, so it's also nice to have the built-in backup return spring in the TPS. |
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| emerygt350 |
Jul 14 2024, 04:45 PM
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#6
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Advanced Member Group: Members Posts: 2,504 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Very cool.
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