There are many complaints about the Spy Trakr motor; all of them say it's too weak.
I opened it up to see what we were dealing with.
Four gears in the train from the motor to the wheel 10:28
10:38
10:38
overall 1:40.4
Should be beefy enough, but the motor spins so slowly; the wheel does about 100 RPM.
Three wires to the motor: black, red, orange (the other wheel is green, blue, yellow)
This is a simple brushed DC motor. Orange/black power the motor and red is a ground to motor chassis.
The motor itself is a little larger than the typical guys I see at the hobby shop.
I will revisit this later to get a better idea of the motor, and how to improve the situation.
I think a lot of the problem with low-torque at <full RPM is the default programming of the PWM timer. Try even a simple tweak of [code]
ReplyDelete#define PPR ((uint32) 0xFFF82000) // PWM Prescaler
#define outp32(port,value) (*((unsigned int *)(port))=(value))
#define inp32(port) (*((unsigned int *)(port)))
uint32 stockp=inp32(PPR)*4;
outp32(PPR,stockp);
[/code]
Funny, I hadn't touched the tracker for almost a year. I picked it St we to start working on radio again. Then you popped on the nearly forgotten blog. I will look at the code snippet and try it out
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