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Topic: Universal Copedant Adjustment Question |
Ken Metcalf
From:
San Antonio Texas USA
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Posted 31 Mar 2009 10:12 am |
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I have a Thomas 12 String that I just bought to leave set up at home and I have been changing the copedant to Universal
It seems to be very easy to work on.
I have it all done except one pedal...
when I lower my Es and step on the 6th pedal it also lowers my E/Eb on to D.. When I tune the 6th pedal it makes the open string flat. until I back off the hex nut.
I have moved the rod out to the end of the bell crank, different holes in the changer.
Any ideas..? I have tried every thing I can think of.
Thank You
Ken Metcalf
_________________
MSA 12 String E9th/B6th Universal.
Little Walter PF-89.
Bunch of stomp boxes |
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Lee Baucum
From:
McAllen, Texas (Extreme South) The Final Frontier
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Posted 31 Mar 2009 10:24 am
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| Perhaps if you add a little bit more travel to that pedal? |
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b0b
From:
Cloverdale, CA, USA
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Posted 31 Mar 2009 10:49 am Re: Universal Copedant Adjustment Question
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| Ken Metcalf wrote: |
I have it all done except one pedal...
when I lower my Es and step on the 6th pedal it also lowers my E/Eb on to D.. When I tune the 6th pedal it makes the open string flat. until I back off the hex nut. |
By "open string", do you mean the E note or the D# being held by the knee lever?
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-𝕓𝕆𝕓- (admin) - Robert P. Lee - Recordings - Breathe - D6th - Video |
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Jon Light (deceased)
From:
Saugerties, NY
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Posted 31 Mar 2009 11:04 am
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Confusing post, Ken.
P6 should, with the E lever already having lowered both E's to D#:
--lower 8th string E>D
--raise the 4th string back up to E
Which string are you having problems with?
But bottom line--as per Lee, after you have changed holes at the bellcrank and the changer, the only thing left is to lengthen the pedal travel, either by changing the stop if you have that adjustment available (not all guitars do) or by changing the starting point. On a round cross shaft steel you can loosen the bellcrank and change its at-rest position to gain more of the arc on your pull but that becomes a diminishing-return deal as you factor in tangents, vectors and all the other stuff we forgot from trig. |
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b0b
From:
Cloverdale, CA, USA
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Posted 31 Mar 2009 11:08 am
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| Lowering the 4th string E to D is a really long pull. A lot of changers can't handle it. If that's what you're trying to do, changing the string from .014 to .015 might make it possible. |
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Mike Perlowin
From:
Los Angeles CA
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Posted 31 Mar 2009 11:41 am
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Instead of having the pedal in question, I release the E-Eb knee lever (LKR) which of courses raises my 4th string back up to E, and kick in a different knee lever (RKR) that lowers my 8th string down to D and also raises my second string, which I tune to C#, up to D.
I raise the 2nd string to D# on a different knee lever. (RKL)
I have no problems hitting the B6 pedals while holding in the LKR. I don't really know how to use them, but there's no physical problem playing them while holding in the knee lever.
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Please visit my web site and Soundcloud page and listen to the music posted there.
http://www.mikeperlowin.com http://soundcloud.com/mike-perlowin |
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Lee Baucum
From:
McAllen, Texas (Extreme South) The Final Frontier
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Posted 31 Mar 2009 11:56 am
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| Quote: |
| lowers my E/Eb on to D |
My assumption (above) was, you are talking about the 8th string being lowered by a knee-lever from E > Eb and then the pedal lowers that string on down to D. If that's the case, you need to adjust that pedal so that it has a little bit more travel.
Jon - What's the vector, Victor?
Lee |
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Ken Metcalf
From:
San Antonio Texas USA
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Posted 31 Mar 2009 1:13 pm
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Thank You everyone
Yes I am referring to the 8th string.
I will try adjusting the stop and see what happens.
Ken
_________________
MSA 12 String E9th/B6th Universal.
Little Walter PF-89.
Bunch of stomp boxes |
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Jon Light (deceased)
From:
Saugerties, NY
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Posted 31 Mar 2009 1:42 pm
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Lee--surely.
Ken--you might know this well but just in case;
one of the most important principles of dependable operation of an all pull guitar is that at rest, with no pedals or levers engaged, the changer must be at its stop. There must be no rod suspending a finger off of the changer rest. In other words all nylon hex tuners must be backed of until there is a tiny bit of slack.
Then, if this backing off means that you cannot get the string all the way to pitch with a pedal or lever you must either change the crank/changer holes or lengthen the pedal/lever throw. Or, as a last resort, use a heavier string which, at greater tension to get up to pitch, will be more sensitive to changer movement and require a shorter throw.
Sorry if you know this stuff. |
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Ken Metcalf
From:
San Antonio Texas USA
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Posted 31 Mar 2009 2:28 pm
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I adjusted the stop and Bingo that was it thanks to all...
The Thomas Steel is a nice and interesting unit.
Very well built.
67 LBs in the case
Ken
_________________
MSA 12 String E9th/B6th Universal.
Little Walter PF-89.
Bunch of stomp boxes |
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