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Old 07-27-2010, 07:16 PM
Andyman Andyman is offline
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Default band saw feeder

I finally had an excuse to throw this together. I got the idea from the last place i worked at they had one of the self feeding vertical band saws and i wanted my own this is about as close as ill get for awhile.

i got the base and linear bearings from some scrap equipment from a chiropractor. my goal is to make it self feeding with compression springs by adding a plate in the back and attaching them to the platform and back plate. The springs i ordered were to heavy duty so im trying to figure out what to buy next.

but for now at least i dont have to feed small pieces of metal through the saw anymore by hand =D
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  #2  
Old 07-27-2010, 08:33 PM
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Vernon Vernon is offline
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Default Band saw feeder

Hey Andyman,
looks good and can cut many things. Just a idea if you made the fence turn you could cut angle. "Just a idea" looks good thanks for showing
Vernon
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Old 07-27-2010, 10:41 PM
Andyman Andyman is offline
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That or use angle blocks when i set it up. That was my thought i didn't think about it your way.
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Old 07-27-2010, 10:47 PM
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Linear bearings make for a very cool project.
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Old 07-28-2010, 07:47 AM
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It's a great idea, and nice work. I would think about some sort of "spacer block" to prevent the blade from contacting the vertical piece of the feeder at the end of the cut.
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Old 07-28-2010, 06:00 PM
Andyman Andyman is offline
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I'm having some trouble figuring out what springs i need to get. McMaster carr gives this equation.
(K/x)/y=L
K- spring constant
X- number of coils per a inch
Y- desired force in inch/lbs
L- length of the spring

i also saw on another site as i searched more that
F= K(LF-LD)
F-force
K- spring constant
LF- is uncompressed length of the spring
LD- is the compressed length of the spring

first off my goal is to have a spring that will give me roughly 3-6lbs of force with at least 2-4inches on compression. the first equation leads me to believe that the spring gives a constant force no matter how much it is compressed. which didn't make much sense to me it seemed like it would be more like the second equation and raise the force exponentially for each inch compressed.

just thought maybe someone would know something about this on here or could at least point me in the right direction of finding a spring to use.
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Old 07-28-2010, 09:50 PM
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how about an air cylinder with a regulator? that way you could andjust the force depending on the specifics of the cut. Bimba makes a large variety of air cylinders on the cheap.
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Old 07-29-2010, 07:57 AM
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Springs won't give constant pressure, the pressure increases as they are compressed. For simple, constant pressure, run a cable over the back edge of the table and hang a weight off it. Gravity is about as constant a force as one can get.
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Old 07-29-2010, 05:39 PM
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Default RE bandsaw feeder

I built a feeder for my vertical bandsaw many years ago.
I just used a small cable and a pulley at the back.
Then a weight on the end hanging on the cable at the bottom.
Worked fine.
Will get a picture later.
alabamaed36046
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Old 07-29-2010, 06:09 PM
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Hurry back Ed.
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