dc motor movement control

[bassam77]

hi there,

I have 3 dc motors (12v-5 ampere)that are connected each with a speed reducer gearbox, actually I want to control these motors with a JOY-STICK switch just controlling there movements in fixed speed, should I use a pwm circuit to drive them or a simple 3-axes joy-stick is enough?
if yes, where can I find a joy-stick that meets my motors requirements?

thanks in advance

 

[Skogsgurra]

That's more of a controller (like you find in trams) than a joy-stick.

Such a cotroller will likely develop at least a couple of hundred watts. Probably more. You will need thick gloves to be able to handle that after a few minutes.

Better use PWM. Most joy-sticks are compatible with analoue inputs to PWM controllers.

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[bassam77]

I agree with you but there are two things must take in consideration:
1. I will only control one motor at a time, i.e. the power will be less than or equal to 60 watt
2. a relay may be used between the joystick and every motor hence the joy stick will be only a control signal.
what do you think in this case?
if this scenario is accepted, does it affect the motor with any side effect?
can I use a resettable fuse as an example to protect my motors?

 

[Skogsgurra]

OK? Fixed speed? Didn't see that first.

Then your joy-stick is just a set of switches with a common handle to control them. Not much heat in such an arrangement.

Use an external power supply that can be set to the desired speed and use DTDP switches in your joy-stick. And, yes, you can use a resettable fuse to protect the motors. If you are going to run one at a time, you need only one protection for all three of them. Put it in the supply lead from the power supply.

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.