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Old 15th October 2008, 06:05 AM   #1
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Default DIY Unipivot - ClearTone

I quickly whipped this one up yesterday evening... a unipivot arm from plexiglass and various bits and piece I had lying around the workshop.

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Old 15th October 2008, 06:55 AM   #2
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Nice. How did you make the curved finger lift? No bias compensation? Was Cantus the inspiration?
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Old 15th October 2008, 07:01 AM   #3
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Quote:
Originally posted by analog_sa
Nice. How did you make the curved finger lift? No bias compensation? Was Cantus the inspiration?
The Cantus was in the back of my mind.

I still need to find solutions for a lifter system and bias system.

Curved finger lift were made by heating the tip with a heat gun and shaping it by hand - hot yes!!

DV
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Old 15th October 2008, 07:01 AM   #4
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Great build! Just add a jewel V-cup and this is pro-stuff!
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Old 15th October 2008, 07:14 AM   #5
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Forgot the most important (jealous) question: how do you get such clean cuts in the acrylic?
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Old 15th October 2008, 07:28 AM   #6
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Quote:
Originally posted by analog_sa
Forgot the most important (jealous) question: how do you get such clean cuts in the acrylic?
The acrylic I use is protected by vinyl stick-on and I dont remove it until I am done. I cut the plastic with a "jig-saw" that is slowed down with a Variac so that it doesnt melt or rip it. After cutting I straigten the edges by sanding it on a piece of sandpaper placed on a flat surface. Easy.
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Old 15th October 2008, 07:29 AM   #7
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Quote:
Originally posted by revintage
Great build! Just add a jewel V-cup and this is pro-stuff!
Thank you for your kind words Revintage! A friend of mine uses an engineering company that can work with jewel bearings - maybe I must get in touch with him.
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Old 15th October 2008, 07:31 AM   #8
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I must admit that the counter weight also needs work. I am currently using an old brass buss-bar from a Mains DB Box. It gives me 1.8 grm tracking force on the dot. Also works as leveling weight by simply swinging it left or right...
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