On 2015-04-06, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus32423 fired this volley in
:

The good news is that, as they run, even after a while, the heatsink
is only barely warm.

What you did not say was 1) the raw battery voltage,

12v nominal

2) the current (both peak and average) for the arm

Not sure, not a lot. The arm operates very intermittently.

3) the current(ibid) for the tracks.

Not sure what is the current for the 5v tracks, but my best guess is 1.2
amps when driving in a straight line, and about 3A when turning on a
dime.

Like Jim said, at only a few watts, nothing's in particular danger here.

A star washer works ALMOST as well as a Bellville spring, so long as you
don't torque it down flat.

OK, I will add something. I will also add heatsink paste, I will
receive it on Tuesday. I could not find my old one.

i