I ended up using a small stepper with a gearhead. A custom ring gear would have
been a great alternative, too !
I use a Pololu driver with an adjustable drive current and an enable/disable
line that I can toggle via an I/O line. So, I can power the driver off when I
want to. My plan is to keep the driver current at a minimum. Not only will that
minimize the battery drain, but it will allow the turret to rotate freely when
Joe runs into me. :)
- Doug
-----Original Message-----
From: rctankcombat@googlegroups.com [mailto:rctankcombat@googlegroups.com] On
Behalf Of Sam D'Haene
Sent: Tuesday, January 19, 2016 7:39 AM
To: R/C Tank Combat <rctankcombat@googlegroups.com>
Subject: [TANKS] stepper motors
Hi Doug,
Stepper motors have very high torque rates and cheap drivers. But a constant
current draw makes them very unefficient in a mobile applicaltion. A dc motor
(without closed loop control) doesn't require power at standstill. A
steppermotor always draw full (or half current) to generate the holding torque.
Sam
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