Sequence starting motors
Sequence starting motors
(OP)
Need to start packhouse motors driving conveyor belts of Fruits. Want to use equal flip flop timer to run about 15 motors (0.37 -0.75kw).The last Belt must run first and the first(At Fruit entrance) must run last otherwise fruits will pille at the next consecutive belt. Must operate manually or Auto. Trip of either of the motor must set trip pilot light, and stop all motors. I did attach circuit drawing. Now got a condition from the packhouse manager that occassionally might want to run different belts independently manually, how can i modify my circuit to manually achieve the condition. Please note i have not to use any PLC in my control circuit.
Vitzwaters
Vitzwaters





RE: Sequence starting motors
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Sequence starting motors
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Sequence starting motors
Keith Cress
kcress - http://www.flaminsystems.com
RE: Sequence starting motors
A PLC has tons more flexibility but the downside is that it's likely the people who will operate and maintain this system im the future will likely not be able to follow the PLC logic and definately not want to modify the PLC logic. This means that any PLC issue will likely become yours. Not a bad prospect if you can make money but definately a bad bad if the customer expects free support (and a customer can come up with many reasons why you should do it for free).
From my view, you should have known that each motor is required to run individually from the start. This is how the conveyers and motors are each tested during maintenance.
RE: Sequence starting motors
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Sequence starting motors
RE: Sequence starting motors
The last motor is the first to start and a NO aux on that is the Auto signal for the next one and so on.
Overloads are kept specific to motors so if a motor stops then everything upstream also stops but everything down stream carries on thus clearing as much product as possible from the belts.
RE: Sequence starting motors
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Sequence starting motors
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...