Hey guys, I am thinking of buying some banebots spur gearmotors to build my biped robot with. The specific one I am looking at is this: banebots.com/pc/MS-16XXX-050/MS-16574-050
I have a couple of questions however, it says the no load rpm is 26, will this change much under load?
I calculated it to be 0.38sec/60 degrees rotation which is more double most servos, will this be a problem or will it still move quickly enough to walk (I am interested in experimenting with dynamic walking using gyroscopes/accelerometers so it will not always be balanced and may need to react quickly)
And finally the torque is listed as 38kg/cm, this seems like much more than enough to walk properly but I just wanted to get some opinions on it, also how can I estimate what the non-stall torque will be?
Thanks looking forward to building my first robot.
What electronics are you going to use to close the servo feedback loop? That could play a significant part in the performance of the motors when built up into a servo.
The link also says there is a 576:1 gear ratio and a stall torque (0 rpm) of 534 oz-in (expect this is at 8V end of operating voltage range) so you could make an x-y graph, put 26 rpm at 0 oz-in on one end and 0 rpm at 534 oz-in at the other and draw a line between them to get a real rough idea of the rpm at any given load. Reality is it will not be a straight line but it is a starting point and you could always do some testing to make a better approximation.
should/might work I guess. can’t comment on best or not as I have not looked at them in a really long time so I have no idea of the current state of the project. sorry.
So basically do you think it would be worthwhile purchasing some of these motors for use in a humanoid biped? The reason I want to be very sure before I buy them is because I am in Australia so I will have to pay a reasonably large shipping amount (Hence the reason I can’t just buy one to play with and test), I will probably buy at least 10 or so just to start with.
They make a point of saying the output shaft needs to be supported (they apparently sell bearing blocks to use). They also have the below controller to use with the motor.
looking forward to building my first robot.