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Re: Drive belt tension
Hi all I've tried the following 1/2" wide belt variations that fit - A section raw edge, AX 'cog' belts?and link belts like Fennerflex, even an OEM belt that almost broke apart it was so perished.? (I haven't tried a wrapped edge (4L) belt meant for outdoor power equipment which has the same x-section but the wrapping would make it harder to bend around small diameters). I can't honestly say that one was any better than the other. Can't?even say that the link belts were 'smoother', which?is the common claim.? I bought 3 new belts (A, AX and Link) with the express purpose of seeing if I could tell the difference - I couldn't, at least not between A and AX and certainly not that made enough difference to justify 4x greater cost for the Link-type.
I think this is because I re-engineered my motor mount and tensioner for solidity. Why people with a std set-up notice a positive difference when using this or that new belt, is probably due more to them tightening and realigning everything when installing the new belt (and why wouldn't you). When looking at how well a belt works you need to widen the scope to include the pulleys and mounting/tensioning as well:?? The 4x6 pulleys are not made to the belt manufacturers pulley dimension std.which has different?groove angles for different diameter ranges (the included angle gets narrower as the diameter decreases). The OEM pulleys are all 36deg, when the larger diameter ones should be 34 and the smallest 31deg.? The smallest diameter?pulley in the set (48mm) is actually below the minimum diameter given in the standard. That probably means the AX belt (with the 'cogged' inside looking like gear teeth) should work better as it's more easily able to wrap around the smaller pulley, but the belt manufacturers' std doesn't allow AX belts to run any smaller diameter than the solid A-section belt.? It didn't perform noticeably?better than the A-section either. The motor mount and tensioner system is very flimsy and prone to vibration, which excites vibration out of the panel steel stand.? What I have proven is that changing the motor mount and tensioner gave me the biggest reduction in vibration and noise of any modification I've made. Check my photo album for what I did, there is a sequence of 15 or so photos of a new mount, pivot bolts and tensioner, even stiffening up the old motor mount to work with the new tensioner. Sorry to be a fly in the ointment, but this is my experience - jv On Sat, Aug 22, 2020 at 8:59 AM Ralph Hulslander <rhulslander@...> wrote:
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Grizzly 7x going up for sale
¿ªÔÆÌåÓýWe just got updated customs info and found for our move we can't take any of our machine tools, so the Grizzly mini lathe with full tool set, horizontal band saw, and a couple of table top milling machines will be for sale as I can get them together.Also tools for my former big milling machine which has been sold. Interested parties should contact me directly so I can work out who might want what. Items are located in Los Gatos, California.? Shipping would be difficult and expensive.? I also suddenly don't have a lot of spare time as I have a lot of things to get rid of SOON. -- Jerry Durand, WhatsApp, Telegram, VK & |
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Re: Added Folder Kerrin¡¯s Quick fit bandsaw table
#file-notice
Kerrin, Your long walk was worth it - the files came through just fine. Thanks for the share.
(I deleted my "testing" file.) k |
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Re: Table for Vertical Cuts with HFT Bandsaw
I for one would appreciate you posting the drawings. Bill in OKC William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein)
On Thursday, August 13, 2020, 10:54:18 PM CDT, kerrin.galvin via groups.io <kerrin.galvin@...> wrote:
Hi George, ?Thanks for the compliment! i have drawing for it if you are interested. I did try to post them here when I made it buy Yahoo didn¡¯t make it possible at the time, no idea why. I should try again, maybe I¡¯d be successful this time! Cheers Kerrin |
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Re: Table for Vertical Cuts with HFT Bandsaw
John, the blade should not be hard against the rims. It should ride clear of both rims when properly aligned. The rim is only there to make it easy to put the blade on. You are bending the blade across its 1/2" dimension more than you need to, if its hard against the top rim.? Hard against the top rim with the guides too far forward means one adjustment is fighting the other, which I believe is the cause of your blade derailing. Back the rear guides off so both are well clear of the blade. Then back off the tilt of the top wheel until it's just clear of the top rim. That unbending will make the blade move toward the rear guide roller at the top, so you might have to move the rear guide roller back still further.? Get the blade to run a fingernail width away from the top rim while clear on both top and bottom rear rollers. Most likely it will now be running more than the fingernail gap away from the bottom wheel's rim. If so, move the bottom wheel out on its shaft (can put the same amount washers behind the wheel to maintain the spacer length and get the blade-to-rim spacing right).? If, after you've adjusted the top, the blade is still hard against the bottom rim, cut down the length of the spacer and move the wheel inward on its shaft until the blade just runs clear of the rim. Beware: moving the bottom wheel back will change where the blade runs on the top wheel, so you go through an iterative process until the blade runs just clear of both wheel rims while clear of both rear guide rollers.? Then adjust the rear guide rollers forward so they just don't touch the back of the blade.? Sorry it's so wordy, rgds - jv On Fri, 14 Aug 2020, 5:56 am john walker, <jwalkergh@...> wrote: Thanks John Vreede for the manual reference, I'm going thru it now. |
John Vreede
Jerry Durand
@KarlH
Bill in OKC too