From: Long Island, NY, USA
Registered: Jun 2003
posted January 20, 2017 02:22 PM
This is very typical looking belt failure: I've seen it all the way from movie projectors to car engines!
If you think about it, a belt going over pulleys gets flexed, gets un-flexed and does it again every time it goes around the pulleys. This is like somebody taking it in their hands and bending and unbending it a couple of times a second...-for hours!
Something's gotta give eventually!
I committed to doing a show for the Cub Scouts a few years ago. I checked out the machine I wanted to use and the belts looked like yours. I ordered a new set and begged the guy to rush ship them: they arrived on time by four hours!
(One less thing to worry about...)
-------------------- All I ask is a wide screen and a projector to light her by...
From: Nouméa, New Caledonia
Registered: Jun 2003
posted January 21, 2017 05:53 AM
This is not the original belt. I bought it from Ebay, I think 'isellprojectorbelts" ot something.
The original belt was last very long time and got loosen after sedral years. This new belt was only one year old and has been like this. This crack does not have any relation with working hours because I did not use my projector. This is more like a life span, whether we use it or not, it will crack due to the age.
The humidity in my country was so high between 80-95%. While the temperature was around 25-32 celcius
From: Villeneuve St Georges, France
Registered: Dec 2015
posted January 21, 2017 07:38 AM
There is a high probability a High Humidity rate accelerate rubber material aging process. Then due to proximity for sea side, salt can be found in the air.Probably a mix of humidity / salt is not good for rubber material.
If you want to keep your machine for a long, it should be interesting to replace rubber belts (and rollers, as necessary) by equivalent made from polyurethan material.
I did that for an EIKI projector arms belts......
//////////////// UPDATING /////////////////
I have observed on the picture the pulley involved is showing a "V" groove. It give me the idea a standard belt ("O" section) made of Silicon material could fit properly, but may be it could be difficult to find....
[ January 23, 2017, 01:12 AM: Message edited by: Phil Murat ]