Regular Member
Joined: 12/01/2011
Location: AustraliaPosts: 62
| Posted: 10:47pm 20 Feb 2011 |
Hi Bob,
I do have a linear actuator (LA30 Linak)
which I may try, the only problem is it's
a bit slow at 12v, I'd have to stop and
wait to turn, I think I could gear the linear
motion up (very short steering arms) or
use a counter lever. Is your twin speed
controller idea based on skid steer? I
was going to build a big servo using a
Bodine gearmotor (ex paristaltic pump
from a dialysis machine)but I can't seem
to buy a driver chip for digital proportional
control. I was going to bust open a little
rc servo and just upgrade the driver
transistors, The drive motors will probably
need up to 15-20 Amps each, worst case
scenario (stalled against obstacle) but
those cheap speed controllers are good
value. The field option will ramp the full
output (85 A) from the alternator so is
pretty bulletproof, but I have to regulate
and store for receiver and steering..
Your idea sounds better, but skid steer
will probably result in a downhill drift
by the time it turns.
Regards Alasdair
Amc-elec