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Homemade bandsaw tilt down

CUCHARA

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Hello everyone,
I need the help of an expert here,

I build my own bandsaw. At the beginning I was able to do straight cuts but now, something happen and each time I try to cut, the blade start to go down as soon as I start to cut the wood.

77f35ee8-7f4d-4ee8-842c-a2f6f6ac7e39.jpg8c17ca72-1ffd-4eba-97f0-aefd832197a3.jpg


In this image each new cut I did, I tried to tilt the blade up with the guide, and the result was always the same.

07cbd715-78d9-4b5b-b825-1ca8e07a229b.jpg d585a0c7-ef62-410b-8c0f-c71aa01db2ec.jpg
I already tried million different stuffs , and the blade do exactly the same cut each time.
I have already changed the blade for a new one. So I'm sure the problem is not coming from the blade. But it should be something with the wheels

I hope there are some expert here
 

merc_man

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Have you loosened the tention and cheacked the bearings for play?

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Moparmyway

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Your cutting surface (blade) is not square with the carriage while cutting.

Lots of things can influence the cut direction, like Mercman said, bearing slop (even new ones), mis-alignments, etc.. can all wreck havoc on our intended plans.

I would look to see how and why (since it is homemade) the cutting angle with the carriage isn't perpendicular with each other whilst cutting................it would seem as if the top blade needs to tilt rearwards and the bottom blade needs to tilt forwards. Hope that makes sense
 

merc_man

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Go over it and make sure no bolts have loosened off.

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CUCHARA

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Hey thanks for your help
The bearings are brand-new actually the guy's are completely news. I replaced the old ones because I start to have these kind of problem

Your cutting surface (blade) is not square with the carriage while cutting.
This photo is the example of what I just say early ( I tried to tilt the blade up with the guide)

I spend more time trying to fix these problems that they actually Time that I took to to build it :crybaby2:

I really don't understand I make many big modifications and the blade still going in the same degrees :crybaby2::crybaby2:
 

MarkEagleUSA

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Is the blade cutting as it’s “pulled” through the wood?
 

rogue60

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If you have tried a new sharp/set band it can't be the band.
Something must of moved if it was cutting straight before.
Packing or bearings as you are using are only for keeping the band cutting straight if it gets dull or to hot in a cut and tries to wonder. You can't and don't use packing to force the bland to cut straight.
Good luck with it.
 

Guido Salvage

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Check your blade tension though in my experience it will cause the blade to rise rather than dive.
 

Bilge Rat

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In the last pic the rollers don't look square to the band.
Looks like they are angled in towards the center causing the band to slide across the surface of the roller.
 
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