
elfege
Hello,
I have a simple 4wd chasis from sainsmart, using EZB and 2.5 amp Hbrige. I cannot make it to turn (wood floor). The only way I got the platform to run is by stripping out the rubbers on rear wheels so there's less friction and it can turn. It seems that while given the order to turn the Hbridge runs the wheels on both sides at the same speed while the wheels on the inner side should run much slower than the wheels on the outer side, is that correct ? If so, do you know what could possibly allow me to have the wheels to turn slower on one side beside using PWN each time I want to turn ?
Thanks,
Elfege
which h bridge do you have ? also how are you wiring it... need a little more info please, pics will help
However it seems I just found a solution : by adding two more powerful motors stripped out from an old broken Rovio (from Wowwee) it now works better.
I guess I have to bring more power to the motors if I want to increase the directional efficiency or install omnidirectional wheels. I've searched online but I know nothing about motors so I don't know what amp and wattage I need...
Here is a link to the documentation, it doesn't give much caracteristics about the motors though :
https://s3-ap-northeast-1.amazonaws.com/sain-amzn/20/20-011-922/4WD.pdf
So, basically, what kind of specs should I look for to have 4 more powerful motors ?
Many thanks,
Elfege
take a look at this ,"just make sure it will fit"
www.robotshop.com/metal-gearmotor-1576.html
with this motor x 4 you should have 640oz of stall torque to get you moving