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Unread 25-01-2011, 10:24
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Mark McLeod Mark McLeod is offline
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AKA: Hey dad...Father...MARK
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Re: jaguar scaling factors

Quote:
Originally Posted by markgryzwa View Post
I assumed the duty cycle at full on was 100% so I simply used a voltmeter
Set to DC. No motors. No load.
Measured two Black and two Grey
Full forward and full reverse
Same result consistently.
This is a false measurment. The Gray Jags at full really drop maybe .15v more than the Black Jag.

Your measurement was just a by-product of the Gray Jaguar circuit design.
It doesn't measure properly without a load.
The Black Jaguar has a different design that doesn't affect no-load measurements.

I tripped over that myself earlier, although you have to read several surrounding posts to understand what was going on in that thread.

I liked Eric's way of putting it...
Quote:
Originally Posted by EricVanWyk View Post
Put simply, it would be physically impossible for a Jaguar (or a Victor) to have an actual 2V drop while driving a motor and not be on fire: It is WAY too much heat to dissipate.
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Last edited by Mark McLeod : 25-01-2011 at 10:35.
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