From bruce@ashbysolutions.com Sat Jun 24 16:43:41 2006
Subject:Re: Simple keydip modification for FATAR waterfall organ keybeds

Hi All,

Let me add that the BX-3 has a Fatar keybed ...

-BW

At 07:01 PM 6/24/2006 -0400, you wrote:
>Hi Ben,
>
>Interesting. It made me measure my Korg BX-3's keybed. The following measurements were taken, using a precision digital caliper:
>
>White keys --
>
>Normal full travel ** = 11.2mm
>Maximum possible travel ++ = 12.1mm
>
>Black keys --
>
>Normal full travel = 11.2mm
>Maximum possible travel = 11.7mm
>
>** This is the travel that the key wants to naturally dip to.
>
>++ To reach this level, one must press down as if using aftertouch (the BX-3 has none).
>
>Based on that, I'll leave the BX-3 alone. It's not worth taking it apart for ~1mm, IMHO.
>
>Regards,
>
>-BW
>
>--
>Bruce Wahler
>Design Consultant
>Ashby Solutions™ http://consult.ashbysolutions.com
>978.386.7389 voice/fax
>bruce@ashbysolutions.com
>
>
>At 06:51 PM 6/24/2006 +0000, you wrote:
>>After gigging with my homemade dual manual waterfall controller, it
>>was obvious that the keydip needed to be corrected. Today I was
>>successful reducing the keydip from 14mm to 10mm (stock hammond is
>>8mm). I will also post the proceedure, but here is the full text for
>>the group. It would be great to compile a list of cloen keyboards
>>that work with this mod (first few steps are reversible). For those
>>who have never played on an organ with shallow keydip, you are in for
>>a pleasant surprise as your chops will "magically" improve!
>>
>>Good luck,
>>-Ben
>>
>>--------------------------------------------------------------
>>Simple Keydip mod for Fatar manufactured waterfall organ style
>>keyboards
>>by Ben Kuris 6/24/06
>>
>>Problem statement:
>>Stock key dip on doepfer/fatar waterfall midi controller kit, MKE
>>TP/8O is 14mm. The lower end of that motion is just plastic flex.
>>Hammond A-102 has measured keydip of 8mm.
>>
>>Result:
>>After mod, fatar has keydip of 10mm and retains touch sensitivity.
>>Limit of key travel is now a large area of rubber so key action has a
>>pleasing bounce during trills. Moving the limiting stop also stops
>>key flex and reduces the chances of breaking a key.
>>
>>After the mod, keyboard action is noticeably faster and closer to a
>>real Hammond.
>>
>>Time: 2hrs
>>
>>Materials/Tools:
>>1) ~36" stip cut from a fan belt— approx 5mm thick with rubber
>>top
>>2) Optional medium dampening gel (NYE NYO Gel 774 or equivalent)
>>3) Needlenose pliers (for removing key springs)
>>4) Glue gun
>>
>>Method:
>>1) Remove about 5 keys.
>>2) Cut about 10cm off of belt and slide under a white key so
>>that the belt is as far towards the front of the key as possible but
>>still within the flat part of the black plastic of keybed.
>>3) Verify thickness and reduction in keydip while maintaining
>>MIDI key triggering and velocity using white key 1st. Then do the
>>same with a black key (adjacent white key must be removed to see).
>>You want to go as thick as possible without impact the key's
>>triggering ability.
>>4) Remove all keys carefully (don't lose springs!)
>>5) Cut long strip to length of keyboard and glue down (I used a
>>hot glue gun). Be careful not to damage key contact dome area. I
>>glued down from one end to the other working in on 12cm at a time
>>6) Optional: Apply dampening gel to keybed hinge point and front
>>guides. I put on a latex glove and worked the gel in with my fingers.
>>7) Reassemble
>>8) Verify that all keys trigger evenly
>>
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>>
>
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