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Possible Shield Requirements Analysis
05-30-2014, 10:11 PM (This post was last modified: 05-30-2014 10:12 PM by steamboat.)
Post: #28
Servo current
Hello James,

I have the new servo mount for Macropede in print. While printing I thought about how to measure the servo current. What about to use the logic chip in the servo as current probe?!

The HK servos use the ME9926:
http://www.force-mos.com/db/pictures/mod...828957.pdf

Other servos also need some "switch" which will have an internal resistance... At the free running HK servo I can measure 24 mV between D and S. Breaking it with the finger a little gives 26 to 27 mV - can't test high torque because the new gears are glued to it and have to dry out first...

All I need is an amplifier which can bring this some mV to a detectable voltage - don't know what to choose here in modern times ;.)

It would make me happy even if we can measure only one turning direction with this.

Rainer
http://www.steamboating.de
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Messages In This Thread
Power Management - steamboat - 05-13-2014, 05:34 PM
Servo current - steamboat - 05-30-2014 10:11 PM
Emoro - steamboat - 06-08-2014, 07:23 AM

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