Hello everybody,
I cannot figure out this by myself, on a first quick look over internet.
I have two motors RS550s like this (http://banebots.com/p/M2-RS550-120) and I want to buy a proper controller for them. I had a look on these two: https://www.robotshop.com/eu/productinfo.aspx?pc=RB-Dim-30&lang=en-US or https://www.robotshop.com/eu/productinfo.aspx?pc=RB-Dim-42&lang=en-US but, I don't know which one is more suitable for my project.
What do you think ?
The first thing I looked at was the stall current of the motors.
At 85A, neither one of the options you linked to would survive. I personally don’t have any good suggestions outside of https://www.robotshop.com/letsmakerobots/node/2484 . There is one listed to maybe handle up to 80+A.
Well your motor consumes
Well your motor consumes 1,2A at no load, but can go up to 10A with a little bit of load and to 82A if stalled :~(. Neither of these drivers can handle 82A but at least they have over-current protection. I would suggest that you make a stall-detection system (probably with shaft encoders) to ensure your current stays around max. 10A. Then you can save yorself some 500$ and buy a medium-power motor controller.
Just my opinion
I was not completely accurate in my description …
Wow. Thank you for the quick replies and for making me aware of the stalled consumtion.
Maybe you can recognize the motor ...so Markamas idea seems ok since I already have the gearbox that prevents stall. Later, if it will be necesary I will try something different. For now I will go with the sabertooth 2x12, which seems a reasonable choice and I will make all the adjustments while building everything ...
I agree with you to use
I agree with you to use sabertooth controller. Personally, I am not an expert and I have 2x50, 2x25,2x12, all of them work very well for a rookie like me. In case you dont burn anything when motor go over certain amps, I’d suggest you to use proper fuse to protect those controller.
The multimeter idea …
I measured the consumption and even when I block the motor for 3-5 seconds, the load is less than 10 amps (it was around 8 amps). This is mainly because the gearbox is not blocking the motor.
I’m beginning to feel proud of my investment …
