Motors and Locomotion
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Posts: 46,084
Where are people using to power their robots having a heavy load ? (
i.e. DC Motors with pulley, sprocket, gears )
Where are people buying their motors, gears, sprockets, etc. ? We
found a place on the web for motors - but they seem expensive. (
http://www.robotcombat.com/marketplace_motors_ame.html )
We are wanting to push a 100 pound load for our robot lawn mower. We
don't think that the smaller geared motors we already have will handle
the load. We want to purchase a motor, and figure that it will have to
be reduced down to 50 rpm for our 12 inch wheels.
Any help would be appreciated.
[noparse][[/noparse]Non-text portions of this message have been removed]
i.e. DC Motors with pulley, sprocket, gears )
Where are people buying their motors, gears, sprockets, etc. ? We
found a place on the web for motors - but they seem expensive. (
http://www.robotcombat.com/marketplace_motors_ame.html )
We are wanting to push a 100 pound load for our robot lawn mower. We
don't think that the smaller geared motors we already have will handle
the load. We want to purchase a motor, and figure that it will have to
be reduced down to 50 rpm for our 12 inch wheels.
Any help would be appreciated.
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
You probably need to supply a little more information here...
What Power Source do you have at your convenience?
What is the maximum grad of inclination that your '100 pound'
lawn mower is expected to traverse? Declination - Brakes?
Will this lawn mower bag the grass? If so, is that weight
figured in with the 100 pounds? Wet grass can be very heavy
depending on the volume in which is being bagged.
Curious:
Where did you come up with 50 rpm? 21.4mph is a bit fast for
a lawn mower.
-Beau Schwabe
>Where are people using to power their robots having a heavy load ? (
>i.e. DC Motors with pulley, sprocket, gears )
>
>Where are people buying their motors, gears, sprockets, etc. ? We
>found a place on the web for motors - but they seem expensive. (
>http://www.robotcombat.com/marketplace_motors_ame.html )
>
>We are wanting to push a 100 pound load for our robot lawn mower. We
>don't think that the smaller geared motors we already have will handle
>the load. We want to purchase a motor, and figure that it will have to
>be reduced down to 50 rpm for our 12 inch wheels.
>
>Any help would be appreciated.
mower and 28 lbs battery pack). Maybe that's a carbon-fiber racing
version [noparse]:)[/noparse].
Dennis
Original Message
From: Bryan Smith [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=OszQla3Jx1dmgcrC67I2Y1HvK59MFWTHiW3yu9H1vzeIh0sZ7pBI4henCJjUfGCRQmyfZyX4ONaJ]bsmith@w...[/url
Sent: Monday, September 22, 2003 2:32 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Motors and Locomotion
Where are people using to power their robots having a heavy load ? (
i.e. DC Motors with pulley, sprocket, gears )
Where are people buying their motors, gears, sprockets, etc. ? We
found a place on the web for motors - but they seem expensive. (
http://www.robotcombat.com/marketplace_motors_ame.html )
We are wanting to push a 100 pound load for our robot lawn mower. We
don't think that the smaller geared motors we already have will handle
the load. We want to purchase a motor, and figure that it will have to
be reduced down to 50 rpm for our 12 inch wheels.
Any help would be appreciated.
[noparse][[/noparse]Non-text portions of this message have been removed]
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bsmith@w... writes:
> Where are people using to power their robots having a heavy load ? (
> i.e. DC Motors with pulley, sprocket, gears )
>
> Where are people buying their motors, gears, sprockets, etc. ? We
> found a place on the web for motors - but they seem expensive. (
> http://www.robotcombat.com/marketplace_motors_ame.html )
>
> We are wanting to push a 100 pound load for our robot lawn mower. We
> don't think that the smaller geared motors we already have will handle
> the load. We want to purchase a motor, and figure that it will have to
> be reduced down to 50 rpm for our 12 inch wheels.
>
> Any help would be appreciated.
>
Brian,
For my robot I used a two motor form Surplus Center 1-800-488-3407. Part
number 5-1252. My robot lawn mower weighs over a 100 lbs. They are $32.50 and
very very powerful.
Tim
Denver
[noparse][[/noparse]Non-text portions of this message have been removed]
site. Did you gear the motor down ? If so, how much ?
Original Message
From: Trkeenan@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=yBRQmmphNI4mKRWor05FAXQsE3b2LLgez1Uc9jxTCZwly8_ypO1lmi9f-eHjkZJ_a1tBrnHv]Trkeenan@a...[/url
Sent: Tuesday, September 23, 2003 5:59 AM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Motors and Locomotion
In a message dated 9/22/03 3:35:00 PM Mountain Daylight Time,
bsmith@w... writes:
> Where are people using to power their robots having a heavy load ? (
> i.e. DC Motors with pulley, sprocket, gears )
>
> Where are people buying their motors, gears, sprockets, etc. ? We
> found a place on the web for motors - but they seem expensive. (
> http://www.robotcombat.com/marketplace_motors_ame.html )
>
> We are wanting to push a 100 pound load for our robot lawn mower. We
> don't think that the smaller geared motors we already have will handle
> the load. We want to purchase a motor, and figure that it will have
> to be reduced down to 50 rpm for our 12 inch wheels.
>
> Any help would be appreciated.
>
Brian,
For my robot I used a two motor form Surplus Center 1-800-488-3407.
Part
number 5-1252. My robot lawn mower weighs over a 100 lbs. They are
$32.50 and
very very powerful.
Tim
Denver
[noparse][[/noparse]Non-text portions of this message have been removed]
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- bumps of course. The blade will be so efficient that we won't need to
bag any grass. We are planning on using a L298N for an H-Bridge along
with a PAK-VIII for PWM. We purchased an electric lawn-mower that
weighs 90 lbs. But with batteries and stuff it will be at least 100
lbs. We are currently planning for the wheels to be 12 inches in
diameter. How did you come up with the 21 miles per hour ? Our formula
is as follows: 12 inch diameter * 3.14 * 50 rpm * 60 minutes in an hour
/ 12 inches in a foot / 5280 feet in a mile equals 1.78 miles per hour.
Are we missing something ?
Have you worked with pulling a 100 lb load ( i.e. heavy load ) ? If so,
did you gear it down ? And where did you get your motor and gear
reduction ?
Original Message
From: Beau Schwabe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=bixCpSF_fAPP99SltRJdf66fWtAQaHA42kXT2aDIBGnFFTk_DQ2CZEMCyosPUhWO5Mr4eiqn4dc8TvG9KZck]bschwabe@a...[/url
Sent: Monday, September 22, 2003 5:15 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Motors and Locomotion
Bryan,
You probably need to supply a little more information here...
What Power Source do you have at your convenience?
What is the maximum grad of inclination that your '100 pound' lawn mower
is expected to traverse? Declination - Brakes? Will this lawn mower bag
the grass? If so, is that weight figured in with the 100 pounds? Wet
grass can be very heavy depending on the volume in which is being
bagged.
Curious:
Where did you come up with 50 rpm? 21.4mph is a bit fast for
a lawn mower.
-Beau Schwabe
>Where are people using to power their robots having a heavy load ? (
>i.e. DC Motors with pulley, sprocket, gears )
>
>Where are people buying their motors, gears, sprockets, etc. ? We
>found a place on the web for motors - but they seem expensive. (
>http://www.robotcombat.com/marketplace_motors_ame.html )
>
>We are wanting to push a 100 pound load for our robot lawn mower. We
>don't think that the smaller geared motors we already have will handle
>the load. We want to purchase a motor, and figure that it will have to
>be reduced down to 50 rpm for our 12 inch wheels.
>
>Any help would be appreciated.
To UNSUBSCRIBE, just send mail to:
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from the same email address that you subscribed. Text in the Subject
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Your use of Yahoo! Groups is subject to
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>We will probably use 12 volts for our battery. The yard is pretty level
>- bumps of course. The blade will be so efficient that we won't need to
>bag any grass. We are planning on using a L298N for an H-Bridge along
>with a PAK-VIII for PWM. We purchased an electric lawn-mower that
>weighs 90 lbs. But with batteries and stuff it will be at least 100
>lbs. We are currently planning for the wheels to be 12 inches in
>diameter.
Diameter * Pi = Circumfrence
12 in * 3.14 = 37.68 in
Oops!... I used 37.68 feet!
...Anyway continuing with the equation...
rpm / 60 = rps
50 rpm / 60 = .8333 rps
rps * Circumfrence = in/sec
.8333 rps * 37.68 in = 31.4 in/sec
ft/sec = {in/sec} / 12
= 2.6167 ft/sec
MPH = ( 3600 * {ft/sec} ) / 5280
MPH = 1.78
Sorry for the ERROR!
-Beau Schwabe
>How did you come up with the 21 miles per hour ? Our formula
>is as follows: 12 inch diameter * 3.14 * 50 rpm * 60 minutes in an hour
>/ 12 inches in a foot / 5280 feet in a mile equals 1.78 miles per hour.
>Are we missing something ?
>
>Have you worked with pulling a 100 lb load ( i.e. heavy load ) ? If so,
>did you gear it down ? And where did you get your motor and gear
>reduction ?
At one time I had a 70 pound 1/5 scale RC car that used two wheelchair
direct drive pancake motors with a 24V supply.
bsmith@w... writes:
> Thanks for your reply. I could not find the part number on their web
> site. Did you gear the motor down ? If so, how much ?
>
>
No, I used the motor connected directly to the wheel. Mine goes a top speed
of 3 MPH using 6" wheels.
Tim
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