A camber is incorporated on vib screens that typically have wirecloth as the media.

1. Most wirecloth is STRETCHED from one side to the other side OVER a CAMBERED set of support rails. Why the camber?

2. With a media like wirecloth....WE MUST break the back of the wirecloth or stretch it OVER the ARCH OF the camber in the support rails to MAINTAIN a tight stretch on WOVEN WIRE CLOTHS.

NOTE: If we tried to tighten wirecloth on a flat, non cambered surface.....YOU COULD NOT....the wire would not tighten and would quickly break up.

3. So the effect of camber is to allow a method to TIGHTEN wirecloth of other...such as side tension rubber down DRUM head tight onto the rubber capped support rails.

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END TENSION CAMBERED DECKS: same theory as above but breaking the back of the wirecloth, or stretching the wirecloth once again over the CAMBER or arch in the support rails but, this way from ONE END to the OTHER END. Typically very long slot ET WIRECLOTH panels....for sand screening etc.

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EFFECT of camber on end tension is to allow a method to FULLY TIGHTEN THE wirecloth down onto the support rails and maintain a drum head tight tension.

LASTLY: The camber is necessary number one. A negative effect of camber is the material ganging up on each side of side tension and ganging up on the feed end area of END TENSION setups.

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If we go to a flat deck setup........we are typically putting in URETHANE panels which DO NOT need to be TENSIONED like wirecloth. They basically fix into a receiving grid frame or other.

POSITIVE effect of flat deck.....no mini surge loads, causing inefficiency of screening due to thicker bed depths is caused...like a cambered deck configuration.

Hope this helps a bit. George ■

I am assuming you are using a fine screen cloth < 50 mesh with side and end restraints to hold it in place on a spar or spars for the screen frame assuming of course you are not using an 8 by 20 foot tyler for pancake flour :^). Sorry George I could not resist that one as I got some really good news in the mail today

I/we need for information screen decks are flat unless you are using fine mesh that must be tensioned.

It all depends on the screen type as well due to the motion used to screen products a camber in the screen will allow for better or worse screening depending on ones point of view, product to be screened, speed of the screen, sceen orbit, throw etc., size of final screened product.

George, john , lyn, and many others will ad more to this ■