|Forum topic by WellMade||posted 03-31-2016 04:04 PM||778 views||0 times favorited||5 replies|
03-31-2016 04:04 PM
Hello All, sorry for the long explanation, but we’ve tried a LOT of things to get this to work.
My shop runs a 1989 AEM 37” single head wide belt sander. We purchased the machine used from NC and the belt tracking has never worked. I spoke with Timesaver (who purchased AEM years ago) and they walked me through the system. Basically, there are 3 parts; Optical eye/sensor, electronic solenoid and the pneumatic solenoid – one of which is not working.
We disconnected the optical eye and limped in a grounded 110v circuit straight into the electronic solenoid. Powering this on and off fired the solenoid and the upper pneumatic solenoid connected to the drum, this isolating the optical eye as the problem.
The “eye” is a Banner Multi-Beam and inside the eye are three components; Logic module, Power Block and the Sensor block itself. What is supposed to happen is that when the belt crosses over the eye, it blocks the light from reflecting and triggers 110v circuit to fire both solenoids, in turn, dipping the drum back in the opposite direction.
We replaced the entire 3-part assembly. Prior to replacing the assembly, when we blocked and unblocked the eye we had no current. NOW, when we do the same blocking/unblocking of the eye we have CONSTANT current.
We’re thinking it could be a sensitivity adjustment on the eye itself or maybe we have some wires swapped. We’re at a loss and could use LJ expertise! Thanks in advance.