to calculate inches per minute you times pi (3.141592) by the rpm of 1 motor and then by the diameter of the wheels in inches
just a sec
part 2 coming in a min
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to calculate inches per minute you times pi (3.141592) by the rpm of 1 motor and then by the diameter of the wheels in inches
just a sec
part 2 coming in a min
OK that's inches per minute
times by 2.54 to get cm a minute
example. so 3.141592 x2,750rpm motors x 3inch wheels
=
25,918.2 inches per minute or 24mph
but with 12inch wheels (30cm) it would do 98mph at top speed!
OK so that's inches per min
if I use
2x 2,750rpm motors
3 inch dia wheels
then we do pi times everything
2,750 (only 1 2750 having 2 motors does not mean you double it)
x 3 (for the wheels in inches)
x 3.141592
that's 25,918.2
or 24mph at top speed
with 13 inch wheels it will do 98MILES PER HOUR! at top speed
for a fw about 25mph is nice and fast
25mph but naff all torque, you generally need gearing for drive motors unless you have really tiny wheels.
Also, 25mph is probably way too fast unless you have near light speed reflexes. For reference 12v drill powered machines (550ish rpm at the wheel) go between 5 and 6.25mph on the different sized blue wheels and are plenty nippy enough.
I know this is kind of an old topic but I found this
http://www.machinist-materials.com/comp ... astics.htm
too much hdpe now and I think there are lots of alternatives
http://www.kjmagnetics.com/calculator.asp Magnetic force calculator... enter the magnet size and grade, and distance between the magnet and the object to be attracted and it will give you your attractive force in lbs.
A nice plastic comparison table:
http://www.machinist-materials.com/c...r_plastics.htm
Now if someone could tell me what each of the values mean that would be great.........
THATS EXACTLY THE SAME AS MINE!
:rofl:
thereQuote:
Originally Posted by archie2000
but i have no idea what anything means.
I suppose I could had titled it better though
That it is! Sorry.
Here's another to make up for it:
http://www.simetric.co.uk/si_metals.htm