Thor is using those ampflow motors with a roboteq 150A controller at 30V. Seemed pretty powerful at Guildford, and he has never had any issues with the controller. All very expensive though.
Back to Hydraulics, are most pumps reversible, ie if I had a pump connected to a actuator, reversed the polarity on the motor driving the pump, the actuator piston would move in the opposite direction?
Most pumps are not reversible. It's only those small hydraulic "groups" that are.
If you try to reverse a normal gearpump, it will blow the seals and leak oil everywere.
Would it be possible to reverse the flow by using a special valve?
The hydraulic motor/pump units for sale from Kenny, linked to a few posts ago, are reversible. You just connect a couple of hoses to your ram, wire up an ESC and away you go. The Big Nipper team were slamming theirs (with brushless motor attached) back and forth several times over a couple of minutes at the the FW Champs to bleed the system through.
Nothing special to a 4/2 hydraulic valve. It's even rather standard.
RoboteQ do a single channel 300A ESC: http://www.robotmarketplace.com/prod...-VDC2450S.html , that would almost be able to deal a fully stalled Ampflow, and should be able to deal with any current spikes, shame they are so damn expensive.
Just buy 4 of these, plug in a driver board and you've got a fairly indestructable 2 channel controller :P
Wow that is a good find, so you'd just need 2 of them and then 2 relays of some sort to complete an H-bridge, some sort of microcontroller and you have an esc? Though for that price it's probabably cheaper to use 4 of them using 2 just as on/off relays.Originally Posted by Rapidrory
Remember that all the higher powered Ampflow motors have four poles, so you can use two smaller ESCs on a motor to get a larger combined current (possibly for less money too). Sewer Snake has been doing that for years and I use the same idea in my FW spinner Scissorhands.
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