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Unread 24-01-2007, 18:00
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AKA: Peter Kieselbach
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Re: PID How to hold an arm in a fixed position without a locking gear box

Quote:
Originally Posted by Alan Anderson View Post
I thought so too, and was about to respond saying so, but I couldn't locate the relevant rule to quote. Can you help me find what I'm certain I'm overlooking? So far, I haven't seen anything in the manual that says each Victor can connect to only one motor. The closest is <R98> which limits Spike relay modules to a single motor. <R91> restricts things in the other direction: "Each motor, actuator, and compressor must be connected to one, and only one, speed controller or relay module." But it doesn't say you can't connect multiple motors to the same speed controller.
Well, that makes at least two of us scratching our heads saying "I could have sworn that was a rule". Here's what I found:
Quote:
<R92> CIM motors and Fisher-Price motors must be connected to speed controllers. They can not be connected to relay modules.
Again, no mention of limit on number of motors per speed controller. From the 2007 Guidelines_Tips_Good Practices.pdf:
Quote:
Only one large motor (CIM, Fisher-Price, Globe or similar motor) should be controlled per speed controller
As far as I know that is only a guideline, not a rule. It goes on to say:
Quote:
In some cases, more than one low current small motor (window/Mabuchi) or actuator may be optionally connected to a single speed controller.
The closest I come to this being a rule is:
Quote:
<R85> ... For examples of acceptable circuit designs, please see the 2007 Robot Power Distribution Diagram.
The Diagram shows just one motor per speed controller.
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