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Hammer C3 31 - Setup Issues - Planer Snipe and Board Kick #hammer #jpsetup #spiralcutterhead

 

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From the video it appears the board kicks when it contacts the infeed or the cutterhead. I could not tell if it is kicking before wood contacts cutter head. So the board appears to have moved before outfeed is engaged. At least near I can tell from video. Not sure if A3 has high/low feed rate, low feed rate may help.

One can also hold the end of the board until it gets picked up by the infeed roller. Then let go and see if the cutter head contact makes the board kick or hold it until outfeed is engaged and let go then.

Again, it would be nice to know if long boards do the same.

Imran


On Feb 22, 2020, at 12:35 AM, mark thomas <murkyd@...> wrote:

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I've not looked at the current A3 adjustment options.? The previous A3 gen (which I also had) did not have feed roller height adjustment, only spring pressure adjustment.? It's not clear to me what purpose roller height adjustment would serve.? The height adjustment would only seem to affect the amount of vertical travel before the roller is running on top of the board, but the thing that affects feed behavior is the amount of pressure applied, which is just a function of the spring adjustment.?

On Fri, Feb 21, 2020 at 11:04 AM David Kumm <davekumm@...> wrote:


From: David Kumm <davekumm@...>
Sent: Friday, February 21, 2020 2:01 PM
To: Will Smithee <wasmithee@...>
Subject: Re: [FOG] Hammer C3 31 - Setup Issues - Planer Snipe and Board Kick #hammer #jpsetup #spiralcutterhead
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If you don't have a pressure bar, my advise was irrelevant.? A difference in spring pressure or height in the rollers could be a cause but I don't know what adjustments are available.? I have a Delta DC33 that I put a Byrd head on years ago and use once in a while as a finishing planer.? Same crap design, roller, head, roller, but it leaves no snipe, leading or trailing.? You should be able to get decent results with a spiral head as it reduces the need for the better design.? Dave

From: Will Smithee <wasmithee@...>
Sent: Friday, February 21, 2020 12:58 PM
To: David Kumm <davekumm@...>; [email protected] <[email protected]>
Subject: Re: [FOG] Hammer C3 31 - Setup Issues - Planer Snipe and Board Kick #hammer #jpsetup #spiralcutterhead
?
Hi Dave, I've adjusted it per the instructions given by Felder making sure each side is "exactly" the same (my gauge goes down to 0.01mm accuracy), but I am also thinking that perhaps the 0.3mm delta between the cutter tip and the outfeed roller perhaps is too much.? In other words perhaps it isn't just "kissing" the board but exerting too much force as exemplified in Mark Thomas's response just below yours with the cool graphic.? Oddly though at the same time, when I have had the highest tension on the outfeed roller compared to the infeed roller I've seen less board kick.

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