Re: Table for Vertical Cuts with HFT Bandsaw
Hi Kerrin, ? Yes, I am very interested in the drawing.? Not sure from the pics how the table mounts on the saw, and would very much like to build this table.? Thanks for all your contributions. ? George ?
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From: [email protected] [mailto:[email protected]] On Behalf Of kerrin.galvin via groups.io
Sent: Thursday, August 13, 2020 11:54 PM
To: [email protected]
Subject: Re: [4x6bandsaw] Table for Vertical Cuts with HFT Bandsaw? 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
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
|
Re: Table for Vertical Cuts with HFT Bandsaw
Thanks Kerrin, ? Very nice work. ? George ?
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From: [email protected] [mailto:[email protected]] On Behalf Of kerrin.galvin via groups.io
Sent: Thursday, August 13, 2020 3:15 AM
To: [email protected]
Subject: Re: [4x6bandsaw] Table for Vertical Cuts with HFT Bandsaw? Hi George,
Heres a link to my photos, hopefully this works.....
/g/4x6bandsaw/album?id=151022 If not use the button on the left side of the site main page which will open the links to everybodys photos, scroll thru to find mine, Kerrins bandsaw mods!
cheers Kerrin
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Re: Table for Vertical Cuts with HFT Bandsaw
Thanks John Vreede for the manual reference, I'm going thru it now.
You are correct in that the blade does ride against both the top and bottom guide rollers.
I will work on moving them back today.
As to the blade on the top wheel it is definitely riding all the way against the rim of the wheel.
There is a bit of discoloration on the blade so I can see how that pic looks like it's not.
Thanks for the replys.
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Re: Table for Vertical Cuts with HFT Bandsaw
The blade has been as you see it in the pics. Has not changed in ages.
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Re: Table for Vertical Cuts with HFT Bandsaw
John, looking at your photos, to me it looks like the blade is not running on the back of the top wheel. You can adjust a couple of screws to tilt the top of the wheel back. This will ¡°pull¡± the blade back, and may cure your problem.
good luck!
Brian.
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Re: Table for Vertical Cuts with HFT Bandsaw
PS. Sorry I forgot about your blade tension question.? Proper blade tension IS very tight.? For a 10-14 Bimetal blade the blade manufacturers say 25,000 to 30,000psi stress.? In lb's of tension that's about 300lb in each run of the blade, so 600lb between the wheels.It definitely twangs but of course a much lower 'note' on the back run of the blade than between the guides. It's about half that for a carbon-steel blade. I've tried quite sophisticated weight gauges and deflection measurement and there are too many errors involved. Although there are better ways, the simplest is to tighten the knob as hard as a normal-strength person can do it.? Not a gorilla or a wimp, and without any aids, like a rag - jv
On Thu, Aug 13, 2020 at 11:35 AM john walker < jwalkergh@...> wrote: Well, this is awkward.
I took some pictures attached.
In vertical mode, I cut thru a 3/8" x 1.25" piece of aluminum with no problem.
I then cut a thin 1/16" piece, also with no problem.
I know the saw is just waiting for me to send this off but what can I say?
It appears to work.
Just as an FYI, when I "pluck" the blade it definitely sounds like a tight guitar string.
I could put a weight gage on it and measure deflection vs distance but I don't know what I would be looking for. Seems like the "twang" test is what people use.
Anyway, if anyone sees anything out of whack, let me know.
Thanks
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Re: Table for Vertical Cuts with HFT Bandsaw
The only ones I see that make me wonder, are the shots of the guide rollers. Both Pics 1 & 4 show the guide bracket (the bit that carries the rollers) almost as far forward when vertical (or downward when horizontal) as the adjustment?slot will allow, it shouldn't be that far forward. In the 4th photo the?roller is hard?against the back edge of the blade. Being too far forward caused the blade on my saw to pop off when cutting when I put a lot of pressure on.? This could be the difference between it not popping off in a horizontal cut but doing so when vertically because you are maybe pushing harder when vertical than the counterbalance spring allows when cutting horizontally. Try this to see if the rollers are too far forward without changing your set-up .?? 1. Take off the blade 2. Make a bit-smaller-than blade-length loop of the strongest, least-stretchy string/fishing line/whatever that you've got, so you can tension it around the band wheels like a blade. 3 Push the string back against the rims of the wheels The string should just not touch the rear guide roller (10-40 thou" away is ok). It won't be in the middle of the rear guide roller because the blade is twisted about the neutral axis of the blade so the string will be off sideways, but it should be in line with?the bearing face of the roller (i.e. in a toward-the-roller/ away-from-the-roller sense). Flick the string off the side of the roller to see how far back it goes. If it only goes?back 40-80thou"?thats?generally ok and shouldn't be causing the?blade to pop off, but more than that and you need to adjust it.? T If it is too far forward, you'll have to loosen the pivot bolt that clamps the guide bracket to the guide arm and tap the bracket backwards. Do this with the blade tensioned in place (because tracking the blade on the top bandwheel puts a bend in the back of the blade that's?not there with string). Hold the guide bracket with a 10" Crescent?wrench or pipe grips so that the blade direction is not altered as you loosen the bolt and tap it backwards (or it won't cut vertically downward properly any more.? The adjustment procedure for the rear guide roller position is on pg13 of the Wilton Model 3130 user manual in the Files section of the 4x6 Bandsaw site, the file is called m_3130.pdf, but if you read on to pg14 you'll see pictures of how to hold the guide bracket and what to do if?you lose vertical cut squareness.? ? Hope this helps - jv
On Thu, Aug 13, 2020 at 11:35 AM john walker < jwalkergh@...> wrote: Well, this is awkward.
I took some pictures attached.
In vertical mode, I cut thru a 3/8" x 1.25" piece of aluminum with no problem.
I then cut a thin 1/16" piece, also with no problem.
I know the saw is just waiting for me to send this off but what can I say?
It appears to work.
Just as an FYI, when I "pluck" the blade it definitely sounds like a tight guitar string.
I could put a weight gage on it and measure deflection vs distance but I don't know what I would be looking for. Seems like the "twang" test is what people use.
Anyway, if anyone sees anything out of whack, let me know.
Thanks
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Re: Table for Vertical Cuts with HFT Bandsaw
Hi George,
Heres a link to my photos, hopefully this works.....
/g/4x6bandsaw/album?id=151022
If not use the button on the left side of the site main page which will open the links to everybodys photos, scroll thru to find mine, Kerrins bandsaw mods!
cheers Kerrin
|
Re: Table for Vertical Cuts with HFT Bandsaw
John, ? Other suggestions for correcting the problem will probably do so.? But the fact that the blade doesn¡¯t come off when cutting horizontal is probably a red herring.? The load due to cutting keeps the blade pushed back such that it cannot come off.? Almost certainly if you block the saw up with the blade just clear of the work so that it can¡¯t hit the stop switch, it will walk off there, too. ? Robert Downs ? ?
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On Wed, Aug 12, 2020 at 7:35 PM john walker < jwalkergh@...> wrote: Well, this is awkward.
I took some pictures attached.
In vertical mode, I cut thru a 3/8" x 1.25" piece of aluminum with no problem.
I then cut a thin 1/16" piece, also with no problem.
I know the saw is just waiting for me to send this off but what can I say?
It appears to work.
Just as an FYI, when I "pluck" the blade it definitely sounds like a tight guitar string.
I could put a weight gage on it and measure deflection vs distance but I don't know what I would be looking for. Seems like the "twang" test is what people use.
Anyway, if anyone sees anything out of whack, let me know.
Thanks
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Re: Table for Vertical Cuts with HFT Bandsaw
Kerrin, ? How do I see your photos? ? George ?
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From: [email protected] [mailto:[email protected]] On Behalf Of kerrin.galvin via groups.io
Sent: Wednesday, August 12, 2020 5:36 PM
To: [email protected]
Subject: Re: [4x6bandsaw] Table for Vertical Cuts with HFT Bandsaw? Hi Guys,
?If you check out my photos there¡¯s picture of my table I built from several ideas I came across.
Cheers Kerrin
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Re: Table for Vertical Cuts with HFT Bandsaw
Hi John,
?I had an issue some time back with my saw doing the same thing. I guess like most of us once you get a bandsaw it becomes my go to to cut anything! So what I found was I had swarf build up on the wheels, so with nothing else obvious I figured I¡¯d clean them. It¡¯s surprising how hard it is to get off! The non drive one I used a steel ruler & a green ¡°Scotchbite¡± pad to clean it back, make sure you do the vertical part of the wheel. I did the drive wheel pretty much the same just be careful IF you decide to power up the saw. This fixed my problem. So now I irregularly clean the wheels which seems to keep the blade jumping off at bay
Cheers Kerrin
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Re: Table for Vertical Cuts with HFT Bandsaw
John, how much blade did you have exposed when the blade came off, I believe one should minimize the exposure.
Ralph
On Wed, Aug 12, 2020 at 7:35 PM john walker < jwalkergh@...> wrote: Well, this is awkward.
I took some pictures attached.
In vertical mode, I cut thru a 3/8" x 1.25" piece of aluminum with no problem.
I then cut a thin 1/16" piece, also with no problem.
I know the saw is just waiting for me to send this off but what can I say?
It appears to work.
Just as an FYI, when I "pluck" the blade it definitely sounds like a tight guitar string.
I could put a weight gage on it and measure deflection vs distance but I don't know what I would be looking for. Seems like the "twang" test is what people use.
Anyway, if anyone sees anything out of whack, let me know.
Thanks
|
Re: Table for Vertical Cuts with HFT Bandsaw
Well, this is awkward.
I took some pictures attached.
In vertical mode, I cut thru a 3/8" x 1.25" piece of aluminum with no problem.
I then cut a thin 1/16" piece, also with no problem.
I know the saw is just waiting for me to send this off but what can I say?
It appears to work.
Just as an FYI, when I "pluck" the blade it definitely sounds like a tight guitar string.
I could put a weight gage on it and measure deflection vs distance but I don't know what I would be looking for. Seems like the "twang" test is what people use.
Anyway, if anyone sees anything out of whack, let me know.
Thanks
|
Re: Table for Vertical Cuts with HFT Bandsaw
Yeah, Kerry's one is exeptional. The slot in front of the blade is closed for control of the workpiece but still able to change the blade with the table in place. Well worth the look - jv
On Thu, 13 Aug 2020, 9:35 am kerrin.galvin via , <kerrin.galvin= [email protected]> wrote: Hi Guys,
?If you check out my photos there¡¯s picture of my table I built from several ideas I came across.
Cheers Kerrin
|
Re: Table for Vertical Cuts with HFT Bandsaw
Hi Guys,
?If you check out my photos there¡¯s picture of my table I built from several ideas I came across.
Cheers Kerrin
|
Re: Table for Vertical Cuts with HFT Bandsaw
Yeah it can be difficult to see.?Worth opening the guard? before you attach the the vertical table so you can tell - jv
On Thu, Aug 13, 2020 at 8:13 AM john walker < jwalkergh@...> wrote: Not sure which wheel comes off, when I open the cage the blade is off, I'll look closer.
And I'll check the assemblies.
Working on some pictures.
Thanks guys.
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Re: Table for Vertical Cuts with HFT Bandsaw
Not sure which wheel comes off, when I open the cage the blade is off, I'll look closer.
And I'll check the assemblies.
Working on some pictures.
Thanks guys.
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Re: Table for Vertical Cuts with HFT Bandsaw
Pictures of the setup would help!
Ralph
Hi John Very odd! Need more info:? 1. Which wheel does it come off? Top or bottom? 2. Do you have to press work hard into the blade or will any pressure do it? Suspect it's to do with one or other of guide assemblies too far forward - when you push on the blade, it acts as the fulcrum to lever it off the closest wheel.? Rgds - jv
Question for all you fans of the? vertical table for your 4x6:
I made a table as well as used the included table for vertical cuts.
Try as I might I cannot keep the blade from coming off the wheels.
The saw works fine in the horizontal but as soon as I cut in the vertical position - pop - off comes the wheel.
I have tried everything, I think. The blade is where it's supposed to be on the wheels and very tight.
Not sure how it could work ok horizontally but not vertically.
Any suggestions?
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Re: Table for Vertical Cuts with HFT Bandsaw
Hi John Very odd! Need more info:? 1. Which wheel does it come off? Top or bottom? 2. Do you have to press work hard into the blade or will any pressure do it? Suspect it's to do with one or other of guide assemblies too far forward - when you push on the blade, it acts as the fulcrum to lever it off the closest wheel.? Rgds - jv
Question for all you fans of the? vertical table for your 4x6:
I made a table as well as used the included table for vertical cuts.
Try as I might I cannot keep the blade from coming off the wheels.
The saw works fine in the horizontal but as soon as I cut in the vertical position - pop - off comes the wheel.
I have tried everything, I think. The blade is where it's supposed to be on the wheels and very tight.
Not sure how it could work ok horizontally but not vertically.
Any suggestions?
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John Vreede