Dual/Poltz type counterweight
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- kugelblitz
- Posts: 37
- Joined: Thu Oct 07, 2021 6:16 am
- Contact:
Dual/Poltz type counterweight
Hello everybody
today i made some first steps towards good cuts, after cutting and embossing inaudible noise for a
couple of months.
I had bought a machine which had no counterweight of any kind in place, so i had to figure one out
myself. I before that i was embossing at 230grs
I looked at pictures of similar machines that generally have the head mounted in a carrier-cage with
a spring providing variable relief.
However none of these head cages, even if i would manage to reproduce them with some 3d printed
parts, seemed very adaptable for this particular machine.
What was there on the machine, was a « mystery lever » at the back of the head ; push it and the
head would go up.
So i made a little guide with some springs, attached a little ball bearing to the end of the lever and
hey presto counter weight.
Although it yielded my best cut yet, there is one big issue with my system :
The two springs on either end don’t provide equal pressure to the head all along the guide and are hard to adjust evenly...
Maybe someone has an idea how to do this better ?
I figure the best way to fix this is to attach a single spring halfway on the path the wheel travels, but
i can’t find a way of attaching that without getting in the way of a bunch of moving parts…
Any ideas ?
I’d also be very interested if anyone knows how counterweight was originally provided on this type
of machine/how the mystery lever is supposed to be used...
today i made some first steps towards good cuts, after cutting and embossing inaudible noise for a
couple of months.
I had bought a machine which had no counterweight of any kind in place, so i had to figure one out
myself. I before that i was embossing at 230grs
I looked at pictures of similar machines that generally have the head mounted in a carrier-cage with
a spring providing variable relief.
However none of these head cages, even if i would manage to reproduce them with some 3d printed
parts, seemed very adaptable for this particular machine.
What was there on the machine, was a « mystery lever » at the back of the head ; push it and the
head would go up.
So i made a little guide with some springs, attached a little ball bearing to the end of the lever and
hey presto counter weight.
Although it yielded my best cut yet, there is one big issue with my system :
The two springs on either end don’t provide equal pressure to the head all along the guide and are hard to adjust evenly...
Maybe someone has an idea how to do this better ?
I figure the best way to fix this is to attach a single spring halfway on the path the wheel travels, but
i can’t find a way of attaching that without getting in the way of a bunch of moving parts…
Any ideas ?
I’d also be very interested if anyone knows how counterweight was originally provided on this type
of machine/how the mystery lever is supposed to be used...
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Re: Dual/Poltz type counterweight
huh! never seen a lathe quite like that before, what's the model?
making lathe cuts on a Presto 6N, HIFI stereo cuts on vinylrecorder
at Audio Geography Studios, Providence, RI USA
http://www.audiogeography.com
at Audio Geography Studios, Providence, RI USA
http://www.audiogeography.com
- kugelblitz
- Posts: 37
- Joined: Thu Oct 07, 2021 6:16 am
- Contact:
Re: Dual/Poltz type counterweight
It's french-made, with a motor by dual, overhead probably poltz and a head by pierre clement... there's a couple of 'em around on the forum but not a whole lot and most post about them are pretty ancient...
Here's some pics of a similar machine with a counterweight spring head mount
Here's some pics of a similar machine with a counterweight spring head mount
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- kugelblitz
- Posts: 37
- Joined: Thu Oct 07, 2021 6:16 am
- Contact:
Re: Dual/Poltz type counterweight
I think I'll make a little moving L-profile that will put variable pressure on the lever by moving it closer/further away with some threaded wire.
It won't be very springy, but i guess it'll work
something like this: with the front rod attached to the lathe and the middle hole threaded, the other two just to guide the whole thing straight...
It won't be very springy, but i guess it'll work
something like this: with the front rod attached to the lathe and the middle hole threaded, the other two just to guide the whole thing straight...
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- kugelblitz
- Posts: 37
- Joined: Thu Oct 07, 2021 6:16 am
- Contact:
Re: Dual/Poltz type counterweight
Some final adjustments to be made and then test custs over the holidays...
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