A3-31 setup and calibration
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As I go back through re-calibrating my A3-31, I'm checking everything is setup correctly rather than just addressing the immediate problem. As I revisit the setup guide here: /g/felderownersgroup/files/Manuals%20&%20Drawings/Hammer%20Machine%20Setup%20Guide.pdfPage 74 calls for an overall height between cutterblock and outfeed table of between -.028" to -.036". This variance never mattered when I was setting up jointers with dovetail ways as far as I remember. So I am curious if anyone in this group knows if this really matters here? Mine is at -.053", so pretty far out of spec, but I'm trying to trace the logic of how reducing it by .02" is really going to help here.
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It relates to how far the blade holders end up holding the indexable blades above the diameter of the cutting head. I can’t say the .020” is too much, but it does make the blade weaker and more prone to chatter sticking out further.
Brian Lamb
blamb11@...
www.lambtoolworks.com
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On May 15, 2023, at 2:55 PM, Richard <rirving@...> wrote:
As I go back through re-calibrating my A3-31, I'm checking everything is setup correctly rather than just addressing the immediate problem. As I revisit the setup guide here: /g/felderownersgroup/files/Manuals%20&%20Drawings/Hammer%20Machine%20Setup%20Guide.pdfPage 74 calls for an overall height between cutterblock and outfeed table of between -.028" to -.036". This variance never mattered when I was setting up jointers with dovetail ways as far as I remember. So I am curious if anyone in this group knows if this really matters here? Mine is at -.053", so pretty far out of spec, but I'm trying to trace the logic of how reducing it by .02" is really going to help here.
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If your hand hits you will know the difference. Designing and building for 50 years
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On May 15, 2023, at 6:29 PM, Brian Lamb <blamb11@...> wrote:
? It relates to how far the blade holders end up holding the indexable blades above the diameter of the cutting head. I can’t say the .020” is too much, but it does make the blade weaker and more prone to chatter sticking out further.
Brian Lamb
blamb11@...
www.lambtoolworks.com
On May 15, 2023, at 2:55 PM, Richard <rirving@...> wrote:
As I go back through re-calibrating my A3-31, I'm checking everything is setup correctly rather than just addressing the immediate problem. As I revisit the setup guide here: /g/felderownersgroup/files/Manuals%20&%20Drawings/Hammer%20Machine%20Setup%20Guide.pdfPage 74 calls for an overall height between cutterblock and outfeed table of between -.028" to -.036". This variance never mattered when I was setting up jointers with dovetail ways as far as I remember. So I am curious if anyone in this group knows if this really matters here? Mine is at -.053", so pretty far out of spec, but I'm trying to trace the logic of how reducing it by .02" is really going to help here.
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Hi, that's a document that's almost 20 years old. If you're trying to setup a machine with the cartridge knife system (what this document is intended for) then it needs to be set correctly to that specification.
This ensures that the knife carriers are in the correct location in the cutterhead, with proper support for the knives. (The head is MAN rated if adjusted properly)
Once you have the cutterhead to outfeed table height set correctly, you then adjust the knife carriers for the correct knife projection above the outfeed table.
If you're doing a Silent Power spiral head adjustment you set the cutters 0.01 to 0.04mm above the outfeed table at hinge and operators side.
Regards, Rod.
Regards, Rod.
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Thanks. The document is perfectly matched to my almost 20 year old a3-31 and I'm glad to have it because of the detail it provides.
I was just curious about why it is so specific about the cutterhead to outfeed height difference since I haven't seen that level of specificity in other jointers I've worked with (I am admittedly working with a very small sample size). Especially since setting the knife height is a separate step. Brian's answer about potentially making the blades weaker/prone to chatter made sense to me. ?
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Hi Richard, as I indicated it's to provide proper support to the knives and maintain the MAN rating of the head.........Regards, Rod.
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I’m curious - what is MAN rating?
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John Hinman
Boise ID
K700S and A941
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MAN/Manual (hand fed) vs MEC/Mechanical (power fed) is used to indicate whether it is safe to use one or the other. In this case its related to the projection of the jointer knives. Here's a brief explanation from Rod on SMC on how it applies to shaper cutters but it applies here as well.?
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Thanks!
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John Hinman
Boise ID
K700S and A941
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In late 1800’s sq heads on jointer were outlawed. New round head projections are only 1 or 2 mm so if your hand hits it bounces off . Same with open winged shaper cutters I would avoid. Have same flaw as aw heads.?
When very young I had a few planers and stickers and tennoners with square heads.
Worked ok one has to be particular with torque on the keeper bolts or trouble flies.
for complicated set ups on stickers these slotted knives give added flexibility in meeting design .
Personally for me it it’s not straight and sq it doesn’t work in my tastes.
Done ?all the old fashion gobley gook stuff for others and don’t have to do that any more to make a buck.
Know just have to avoid hot SS chips and 6061 razor blades.
mac,,
Designing and building for 50 years
rodsheridan