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Northstate / PM 1632 Snipe On leading end

John Deming All Messages By This Member #138750 Edited Just started getting familiar with my new Powermatic 1632 open end wide belt similar to Northstate machine. ?I am getting snipe on the leading end of a 22” piece of 12/4 white oak. ?I adjusted the pressure bar with no impact. ?It seems a like the indeed rollers are sitting too high but do appear to be adjustable down. ?Is this just a symptom of a short piece and have to live with it or are the infeed rollers adjustable? Or is there something else i may be doing wrong? ?Have been takingvery light passes with 80 grit. I am using the platen. Piece gets hung up after dropping off the first roller.? ?
Tom Gensmer All Messages By This Member #138753 Hi John,? ? Yes, snipe on the leading end of the piece would indicate you need more pressure on the in-feed pressure roller. I have the Northstate sander as well, and do not experience this snipe.? ? I have a memory that there is some mention of the relationship between the in-feed roller and the primary drum, but I can't put my hands on it at the moment. I'd have t check my machine but I have a vague sense that I have my pressure roller set ~1mm or 2mm below the primary drum. My memory is that you want the in-feed roller to firmly engage with the work, but not so much that you feel a "ka-chunk" as the wood engages with the roller, and not so much that you're deflecting the feed bed.? ? Do you have measurements of the relationship between your pressure roller and primary drum? Probably best to record the Factory settings prior to changing things...? -- Tom Gensmer Heritage Home Renewals, LLC Minneapolis, MN
John Deming All Messages By This Member #138755 I think the infeed pressure bar was not set correctly. ?I made an adjustment based upon your comment and it seems to have improved. The piece still gets hung up / slips but the snipe has diminished. I am not getting any snipe on the trailing end. ?I mostly process short pieces so i do not really want to deal with snipe. ? I am hoping to be able to sand down to 1/8-1/4 material as well. ?? ? How heavy of pass is realistic with this type of sander?
Tom Gensmer All Messages By This Member #138756 Hi John,? ? I have sanded parts as thin as 1mm, so you can definitely process thin material.? ? I generally raise the feed bed two full rotations of the hand wheel when using 80 grit, which I think corresponds to something like 0.2mm per rotation, so 0.4mm passes. I wouldn't want to be much more aggressive than that. I usually use 80 grit to get to my final thickness, then I'll swap belts to go up through the grits (if necessary), leaving the feed bed fixed.? ? -- Tom Gensmer Heritage Home Renewals, LLC Minneapolis, MN
John Deming All Messages By This Member #138757 Are you using the platen at 80 grit? ?I am having to almost push / pull the piece lightly on some passes as it not easily passing through. ?The feed rate / gears ?is at the lowest setting.?
David P. Best All Messages By This Member #138758 开云体育 John, ?I have owned the Northstate branded 1632 Widebelt sander you have for over 20 years now and gotten great service out of it. ?I even posted some videos a long time back on how to adjust the belt tracking, and you’ll find some posts in the archive about the platen and how to replace the graphite cloth. ?Videos??- not the last video on platen adjustment. The leading edge snipe you are experiencing is due to a misadjusted ?infeed pressure roller. ?You want to bring the feed roller (which is spring loaded). downward. ?I’m attaching the manual for the WB you have, and call your attention to page 15. ?The feed rollers that keep the material pushed down and against the feed belt are shown in this parts diagram. ?Elements marked #15 can be adjusted to increase or decrease snipe. ?I’ve done it a few times and it is somewhat of a chore to get at the adjustment points. ? As for typical depth of cut limits, that all depends on what grit paper you’re using and the type of material you are sanding. ?On a finish pass with 120 grit on oak, I will typically set the machine to remove about 0.2mm. ?You can fine tune the depth of cut by raising or lowering the platen. ?Hope this helps. David Best DBestWorkshop@... https://www.flickr.com/photos/davidpbest/collections/ https://www.youtube.com/@David_Best toggle quoted message Show quoted text On Dec 15, 2024, at 2:12?PM, John Deming via groups.io <jldjr26@...> wrote: [Edited Message Follows] Just started getting familiar with my new Powermatic 1632 open end wide belt similar to Northstate machine. ?I am getting snipe on the leading end of a 22” piece of 12/4 white oak. ?I adjusted the pressure bar with no impact. ?It seems a like the indeed rollers are sitting too high but do appear to be adjustable down. ?Is this just a symptom of a short piece and have to live with it or are the infeed rollers adjustable? Or is there something else i may be doing wrong? ?Have been takingvery light passes with 80 grit. I am using the platen. Piece gets hung up after dropping off the first roller.? ? <inline.0.part> 17 Inch Widebelt Sander Northstate Powermatic.pdf 17 Inch Widebelt Sander Northstate Powermatic.pdf
John Deming All Messages By This Member #138759 Thank you Tom and David. ?Adjusting the pressure bar has helped which appears to be off from the factory. ? I was able to make an adjustment but need to find a way to accurately measure the bar relative to infeed roller. Part of the learning curve with a new machine. ?One thing i do not understand is it seems like a challenge to get the heavy piece of white oak to feed without push / pull lightly.,..12/4 material?
David P. Best All Messages By This Member #138760 ? Are you using the platen at 80 grit? I am having to almost push / pull the piece lightly on some passes as it not easily passing through. The feed rate / gears is at the lowest setting. This is another indication that your infeed and/or outfeed pressure rollers are not properly adjusted or that your feed belt is worn or glazed over. The best indicator on depth of cut limitations is the AMP meter on the control panel. Indications much above 10 amps and you risk a stall / shutdown. David Best - via mobile phone
David P. Best All Messages By This Member #138761 开云体育 To adjust the pressure rollers, lay down a piece of ? Baltic birch plywood (or similar that you know is dead flat) to cover the entire rubber feed mat. ?That provides a reference surface from which you can measure the feed rollers and how their position relates to the main rubber-coated drive drum position. ?Then use a dial indicator or step blocks with feeler gauges to make sure both ends of both pressure rollers are the same distance from the plywood reference surface. ?You want the feed rollers to be about 2mm lower than the surface of the main drive drum if I recall correctly. ?It definitely takes some trial and error passes to get the pressure rollers adjusted. ?Too much pressure roller action and you will experience trailing-edge snipe / too little and the material will not feed consistently and you get leading-edge snipe. ?A Oneway Multigauge turned upside down is the best tool for to check the relative roller positions. ?

Or make your own:

David Best - via mobile phone?

Show quoted text

On Dec 15, 2024, at 4:05?PM, John Deming via groups.io <jldjr26@...> wrote:

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Thank you Tom and David. ?Adjusting the pressure bar has helped which appears to be off from the factory. ? I was able to make an adjustment but need to find a way to accurately measure the bar relative to infeed roller. Part of the learning curve with a new machine. ?One thing i do not understand is it seems like a challenge to get the heavy piece of white oak to feed without push / pull lightly.,..12/4 material?

#138762

Thank you. ?The machine is new, so the bed belt is good. ?Looks like some more minor infeed pressure roller adjustments should get me there. I will work to get an accurate measurement to adjust from here?

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