Slo-Syn as indexer
Slo-Syn as indexer
(OP)
I would like to use a small synchronous motor, such as a slo-syn or oriental motor, in an indexing application. Around 60 indexes per minute, one revolution, triggered by a photocell. It will be triggered to stop when the crank arm passes a prox. The motor will have a crank so there is very little starting inertia as it will be stopping at top dead center of the stroke.
Question: How to control. I am looking at a small PLC/smart relay controller such as the Siemens LOGO. The brochure indicates it can have 4 relay outputs, 10A for resistive load, 3A for inductive load. The motor need .5A continuous.
Besides the RC in the motor connection diagrams, do I need some protective elements between the controller and motor such as fuses, relay, starter, contactor etc., or can I drive it directly from the PLC or smart relay.
Question: How to control. I am looking at a small PLC/smart relay controller such as the Siemens LOGO. The brochure indicates it can have 4 relay outputs, 10A for resistive load, 3A for inductive load. The motor need .5A continuous.
Besides the RC in the motor connection diagrams, do I need some protective elements between the controller and motor such as fuses, relay, starter, contactor etc., or can I drive it directly from the PLC or smart relay.





RE: Slo-Syn as indexer
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Slo-Syn as indexer
As itsmoked suggested, a protective device is a must no matter how small it is.
RE: Slo-Syn as indexer
So I just need to add a fuse or breaker. Will the frequent starting and stoping, 60/minute, be a problem for the Logo's relay output? It has 4 relay outputs, 10A for resistive load, 3A for inductive load.
RE: Slo-Syn as indexer
Take a look at stepping motors.
Mike Halloran
Pembroke Pines, FL, USA
RE: Slo-Syn as indexer