Knife Edge Question - Jemsite
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post #1 of 4 (permalink) Old 04-02-2020, 12:39 AM Thread Starter
 
Join Date: Mar 2020
Posts: 3
Knife Edge Question

I went through the tech section regarding setting up the action and aware of the locking nut concept. I have a Jem BFP 2015

I am noticing that the bottom knife edge is way longer than the top, and I can adjust the height fine when it comes to the bottom tremolo but not the top. Is it because the difference in the knife edge? Is there an issue with my guitar/

;^
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post #2 of 4 (permalink) Old 04-03-2020, 04:39 AM
 
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Location: Valencia, Spain
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Re: Knife Edge Question

It is difficult to diagnose what is happening without seeing the guitar in person. From the pic you have provided, the treble post seems to be moved towards the neck making the base plate sit non parallel to the cavity routing and the trem to close to the corner of the routing. And that is why the trem knife seems to be longer. But it could be probably an effect to my eye due to the pic angulation and the position of the string saddles due to the intonation pattern.

That guitar is made out of a soft wood (basswood) and the stud insert may have moved into the wood oblonging it. Also the neck relief, neck alingment, twisting, need of shimming, nut height and fret dressing could afect your string height.
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post #3 of 4 (permalink) Old 04-03-2020, 06:59 AM
 
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Re: Knife Edge Question

Seems good to me. One knife is curved one is straight. That is what you see. So tremolo is fine. If you have issue with it ask some with more experience to check it.
If there is an obstacle to lower bridge, it should be visible. One more thing: is bass side knife in the stud groove?

Last edited by peromucho7; 04-06-2020 at 02:35 AM.
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post #4 of 4 (permalink) Old 04-05-2020, 08:00 PM
 
Join Date: Oct 2019
Posts: 181
Peromucho7 is right man. That knife edge doesn't look like its seated in the post. Which would definitely cause your issue.
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