Hi, I was looking at the motors on the bottom of the page of lynxmotion. There is the one that goes at 300 RPM’s and the one at 65 RPM’s. do you guys think that if I put two motors with the 65 RPM’s, will it work? will the 300 one work?
anyone used them and could give me some info?
I guess if I use the 200 RPM’s I will have to buy 4 right? because the torque is kinda low…
Sam
well, it all comes down to…wat do you want to do 
go fast? or go slow but rip trips from the ground 
I wnat to go fast I guess for the moment I can just go with two 300 RPM’s and latter on when I have more money buy two others. but, what’s is the difference between planetary and spur? at about the same torque, the spur only has 120 RPM’s. so I guess I’m better off with planetary?
Sam
As long as you use the same model of motor, everything should be just fine. Just make sure your motor power supply is correct and everything is connected properly according to the documentation.
When I start converting WALTER to use motors instead of servos for locomotion, I am going to start out with a pair of GHM-04’s since they also have the shaft that will accept the encoders.
I will also be using motors instead of servos for Walk 'N Roll’s wheel system.
8-Dale
The difference between planetary and spur gearheads is the physical arrangement and construction of the gear trains. It’s easy to get very low gearings in a small space using planetary gearings, with a large amount of meshing tooth surface area, for large amounts of power transfer without worrying so much about stripping gears. They’re usually cylindrical in form.
A comparable reduction in a spur gearhead requires a train of multiple gears, “folded” up into a small space, often with multiple gears sharing common shafts. There is often less surface area involved in the meshing of gears, though the overall strength of the arrangement is complicated by how “deep” the various meshes are within the train. Spur gearheads are sometimes cylindrical, in a form-factor similar to the motor it is attached to, though they can be other shapes as well. A standard servo is an example of all of these factors: Multiple tooth widths, “folded” gear trains, multiple common shafts, and a geartrain that’s a different size and shape from the motor it’s attached to.
A spur gearhead is used for more reduction in a small space, while a planetary gearhead is used when you want power transfer and efficency.
ok, thanks for your answers! so I guess I will go with planetary, they will have more speed for the same torque, and for space, well i’ll just find some.
IDK know about 300rmps bud. My older SPY1 had 200RPM motors and it couldnt drive on carpet or even on outdoor cement. It could only drive on really smooth surfaces.
how come?? not enough torque? did you have 4 motors? and how big where your wheels and how much torque?
Sam
I had 4wd and offroad robot tires that kept the robot huggign the ground and reached under and above the chassis. After upgrading to lower RPM’s and higher torque most of my issues were solved, as well as overvolting the motors slightly.
ok… So I guess I should go with the 65 RPM’s, it’ll give me 60 feet/minute, and loooots of torque (28 kilos-cm) with the 3.75 inch diameter of the tracks. but what’s crazy is the rover kits at LM that go ar 43in./sec. !!