Discussion about the Korg PolySix synthesizer

Hi Andy,
 
You seem to be off by one mm on some of the diameters. I haven't seen any M2
anywhere on the Polysix. All of the smaller ones are M3. Here are the ones
on the exterior:
 
M5x20 - (6) Keyboard
M4x14 - (4) Top panel - 2 on each end
M4x20 - (4) Across the bottom back of the panel
M4x50 - (2) Pitch bend assembly
M3x5 - (10) Top panel - hold the circuit boards with knobs up
M3x5 - (3) jack panel
M3x8 - (4) Power supply board - around the big Korg logo
M3x5 - (4) Around the AC inlet
M3x5 - (2) Holding the serial number plate. These are coarse thread screws,
not machine screws.
 
There are also two big ground lug bolts. I don't have any of those out at
the moment so I don't know if they are M4 or M5. Any bolt will do as long as
you have a nut for it.
 
They are measured out to the extreme edges of the thread, not just the
center bore. These are all black-oxide metric machine screws (bolts). I
don't have the thread pitch here at the moment, but I can find it somewhere.
They are all standard pitches.

The M5 for the keyboard seem to be the only ones that have a "Standard"
(American) size close enough to use. M5x20 can use 10-32x.75 which just
happens to be the standard rack-mount bolts which you can find anywhere.
 
M3 is common for the four bolts holding a CD/DVD drive in a computer, and
for many remote-control vehicles, although the R/C hobby shops seem to have
mostly hex-head, not phillips head, so you would need a 2mm hex key instead
of a screwdriver. 
 
Don B.
 
  _____  

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
Andrew Jury
Sent: Saturday, September 04, 2010 6:02 AM
To: PolySix@yahoogroups.com
Subject: Re: [PolySix] Re: Hardware screw sizes for the Polysix


  

Nothing like a good project, eh?!

Here are the gory details for future posterity...

1. The four top panel outer screws: M3x14 black, pan cross head machine
screw with nylon washer.
2. The top panel 'inner' screws that fasten the PCBs: M2x5 black, pan cross
head machine screw with nylon washer
3. The underside top panel screws that fasten those same PCBs to the
brackets: M2x5 zinc cross head machine screw
4. The bottom screws for the keyboard assembly: M5x20 black, flanged pan
cross head machine screw
5. The two screws underneath for the bend wheels: M3x50 black, pan cross
head machine screw with nylon washer

OE&E. All measurements courtesy of my wonky steel rule. UOM metric because I
am a European sort of guy...

Cheers,
Andy

On 03/09/2010 23:24, "ML" <f115@rocketmail.com
<mailto:f115%40rocketmail.com> > wrote:

> 
> That would be amazing. I'd greatly appreciate it. It's a pile of them!
> 
> - The four top panel outer screws
> - The top panel 'inner' screws that fasten the PCBs
> - The underside top panel screws that fasten those same PCBs to the
brackets
> - The bottom screws for the keyboard assembly
> - The two screws underneath for the bend wheels
> 
> Heh - this poly is just a pile right now. Not quite in a bag but close :)
The
> lower assembly PCBs are all in place though so at least those wood screws
> appear to all be there.

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