From: [email protected] <[email protected]> on behalf of David Blehar via groups.io <davidblehar@...>
Sent: Thursday, December 17, 2020 4:13:38 PM
To: [email protected] <[email protected]>
Subject: [FOG] The "Singing Planer" finally solved...I think

Long time lurker, first time posting, thought I'd share a minor success I had recently. I've been using an AD741 for three years now, have always been annoyed by the occasional high pitched squeal that comes from vibration of the bent metal infeed pressure bar. I had read several message threads here about potential fixes but so far as I gathered no one had arrived at one. I had contacted Felder about it and was assured it was nothing abnormal, and there was no particular fix for it.

The squeal?only happened for me when taking sequential passes on boards, not on a rough surface, so my thought was that the drag of a smooth board on the pressure bar was leading vibration in the entire bent metal bar. I found that i could temporarily alleviate the problem but putting paste wax on inferior edge of the bar, but that only lasted so long.?

So I did two things. First, I attached a thin layer of foam to the surfaces of that metal bar in areas where it wouldn't interfere with any moving parts. I used some left over shelf liner material to do it. Then I filled the little crevice created by the last bend in the metal plate with hot glue (the area circled in blue on the diagram). Those measures really dampened any vibration in the plate. As a final measure I put a piece of Low Friction tape that I got from Lee Valley along the bottom edge where the bar rides along the wood.?



I'm not really sure which of these fixes was the one that did the trick, I'm guessing probably the low friction tape was the key given the paste wax experiment, but between all those measures the high pitched squeal is completely gone. What a relief, it was driving me nuts.?

Anyway, thought I'd share in case anyone else out there is having the same issue.?

Incidentally, just placed an order for a k700 slider, so i'm sure i'll be hitting you all up with questions in a few months when this thing arrives.?

-Dave