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Unread 01-08-2012, 11:48 AM
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Official 2012 Motors Models and Specs Thread

I wanted to create this thread as the place to discuss all the different motor possibilities for 2012 including the new motors in the kit of parts, and the plethora of motors available to us through the junkyards participating in the auto recycler network. Near us, the local Pick Your Part participates. That would be rather interesting if we could go get whatever motor from whatever car.

What make and model of car has the most powerful motor in its doors, seats, wipers, and windows?
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Unread 01-08-2012, 03:00 PM
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Re: Official 2012 Motors Models and Specs Thread


Quote:
Originally Posted by sanddrag View Post
the plethora of motors available to us through the junkyards participating in the auto recycler network.
Does anyone know if there is a link to an online PDF of the ARA PDV ?


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Unread 01-08-2012, 03:41 PM
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Re: Official 2012 Motors Models and Specs Thread

Wiper motors and window motors will not be as strong as seat and door motors.

The vex motors and throttle motors are, uh, interesting? I'm most excited about the PG71. Hopefully it will be more reliable than the banebots 775/planetary. Also, the pg71 planetary can be bought separately, as can the adapter plate for 500 sized motors and the 1/2 inch shaft adapter.
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Unread 01-08-2012, 04:46 PM
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Re: Official 2012 Motors Models and Specs Thread


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Originally Posted by PAR_WIG1350 View Post
I'm most excited about the PG71. Hopefully it will be more reliable than the banebots 775/planetary.
The PG71 and the RS775 are not even in the same league. The 775 is 271 watts max, and the PG71 is 21 watts max.



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Unread 01-08-2012, 05:04 PM
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Re: Official 2012 Motors Models and Specs Thread

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Originally Posted by Ether View Post



The PG71 and the RS775 are not even in the same league. The 775 is 271 watts max, and the PG71 is 21 watts max.



That is with the gearbox, without it is 180 W, as a reference the 775 is about 100w more! not 250...Still a big deference between a motor of the exact same size/look!
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Unread 01-08-2012, 05:05 PM
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Re: Official 2012 Motors Models and Specs Thread

Specs on the PG75 from AM
Performance Specs:
Voltage: 12 volt DC
No Load RPM: 84 rpm

No Load Current: 1.3 amps

Maximum Power: 130 Watts

Stall Torque: 6.8 ft-lb (at 11.6 volts)

Stall Current: 11.3 amps (at 11.6 volts)
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Unread 01-08-2012, 05:07 PM
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Re: Official 2012 Motors Models and Specs Thread


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Originally Posted by Timz3082 View Post
That is with the gearbox, without it is 180 W
Could you please post a link to your source for this data. Thank you.


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Unread 01-08-2012, 05:12 PM
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Re: Official 2012 Motors Models and Specs Thread


Quote:
Originally Posted by Bruceb View Post
Specs on the PG75 from AM
Performance Specs:
Voltage: 12 volt DC
No Load RPM: 84 rpm

No Load Current: 1.3 amps

Maximum Power: 130 Watts

Stall Torque: 6.8 ft-lb (at 11.6 volts)

Stall Current: 11.3 amps (at 11.6 volts)
Read posts 4, 5, 7, and 8 of this thread:

http://www.chiefdelphi.com/forums/sh...ad.php?t=99390


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Unread 01-08-2012, 05:41 PM
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Re: Official 2012 Motors Models and Specs Thread

Quote:
Originally Posted by Bruceb View Post
Specs on the PG75 from AM
Performance Specs:
Voltage: 12 volt DC
No Load RPM: 84 rpm

No Load Current: 1.3 amps

Maximum Power: 130 Watts

Stall Torque: 6.8 ft-lb (at 11.6 volts)

Stall Current: 11.3 amps (at 11.6 volts)
These numbers, posted by me on the AM website two days ago, are not correct. They have been updated to much more realistic, and larger numbers. We at AndyMark are changing these numbers a bit after some further testing this weekend. Sorry about this change. Please check our PG71 web page for any further updated information.

Here is more to the story.

When I was updating the web page for this motor on Friday, getting it ready for Saturday's kickoff, I saw that the stall torque was listed at 11 amps. This is information we got from the manufacturer. So, I called Mark, who was out at Manchester for kickoff to see what was up with this. He created and interpreted the performance numbers a few weeks ago, and listed the stall torque at 11 amps. We both thought about this some more and agreed that was waaaaay too low. He got home today and did a bench test that repeatedly performed at these numbers below. This test was ran with a 12.8 volt battery providing voltage directly to the motor. The stall torque is 23 ft-lbf, and the max current reading is 28.6 amps. We believe this translates to approximately 350 watts as the max power for the motor.

Tested at 12.8 volts
23 ft-lbf max torque at stall
28.6 amps pulled at stall
Estimated 350 watts of power

Here is Mark's setup. He had a force gauge measuring an arm's pull at exactly 1 foot away from the motor. The force gauge showed 23 lbs of force and the amp meter showed 28.6 amps. It was a simple setup, and we ran it about 10 times. The numbers were consistent. These numbers make much better sense to me compared to the "11 amp stall torque" numbers I posted on Saturday.

Again, sorry for these erroneous numbers yesterday, and please check out the PG71 website for future updates.

Sincerely,
Andy Baker

Last edited by Andy Baker : 01-08-2012 at 05:47 PM.
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Unread 01-08-2012, 06:12 PM
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Re: Official 2012 Motors Models and Specs Thread

Quote:
Originally Posted by Andy Baker View Post
Tested at 12.8 volts
23 ft-lbf max torque at stall
28.6 amps pulled at stall
Estimated 350 watts of power
The numbers don't seem to add up. Using the 84 rpm free speed from the AM web site:

At 12 volts:
stall torque = (12/12.8)*23 = 21.56 ft-lbf

Assuming max output power occurs at half stall torque and half free speed:

half stall torque = 21.56/2 = 10.78 ft-lbf

half free speed = 84/2 = 42 rpm

max watts = 42*10.78*0.142 = 64.3 watts
At 12.8 volts:
free speed = (12.8/12)*84 = 89.6 rpm

Assuming max output power occurs at half stall torque and half free speed:

half free speed = 89.6/2 = 44.8 rpm

half stall torque = 23/2 = 11.5 ft-lbf

max watts = 44.8*11.5*0.142 = 73.2 watts



Last edited by Ether : 01-08-2012 at 09:08 PM. Reason: edited for clarity
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Unread 01-08-2012, 06:57 PM
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Re: Official 2012 Motors Models and Specs Thread

Quote:
Originally Posted by Ether View Post



Could you please post a link to your source for this data. Thank you.

here is the official FIRST data sheet, might it also be incorrect?
http://www.usfirst.org/sites/default...r%20Info_0.pdf

the am-9012 is the base motor and the am-9014 is the motor with the gearbox...
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Unread 01-08-2012, 07:40 PM
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Re: Official 2012 Motors Models and Specs Thread


Quote:
Originally Posted by Timz3082 View Post
the am-9012 is the base motor and the am-9014 is the motor with the gearbox...
Not according to the AndyMark web site.

What is your source for this information?


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Unread 01-08-2012, 07:57 PM
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Re: Official 2012 Motors Models and Specs Thread

Quote:
Originally Posted by Ether View Post



Not according to the AndyMark web site.

What is your source for this information?


http://www.andymark.com/product-p/am-0914.htm
http://www.andymark.com/product-p/am-0912.htm

The PG71 gearmotor is AM-0914 (quoted on First's data sheet in the above link as having an 11.3 amp stall current)
The 9015 motor is AM-0912

It looks like the First document has the same misquoted figures for AM-0914
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Unread 01-08-2012, 08:14 PM
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Re: Official 2012 Motors Models and Specs Thread


Quote:
Originally Posted by Mark Sheridan View Post
http://www.andymark.com/product-p/am-0914.htm
http://www.andymark.com/product-p/am-0912.htm

The PG71 gearmotor is AM-0914 (quoted on First's data sheet in the above link as having an 11.3 amp stall current)
The 9015 motor is AM-0912

It looks like the First document has the same misquoted figures for AM-0914
I should have been clearer. The point in contention is this: Timz3082 is claiming* that the motor portion of the PG71 (am-0914) is the same motor as the 9015 (am-0912). I was asking where he got that information.


* see post #5: "That is with the gearbox, without it is 180 W"

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Unread 01-08-2012, 08:34 PM
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Re: Official 2012 Motors Models and Specs Thread

Sorry, I was misinformed, upon further examination, the other motor is infact a different motor. The one without a gearbox is rs550 sized, the one on the gearmotor is rs775 sized, sorry about that, the person who inventoried our kit must have made a mistake.
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