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-   -   2007 Motor Specs (http://www.chiefdelphi.com/forums/showthread.php?t=51046)

Arkorobotics 09-01-2007 02:05
Re: 2007 Motor Specs
 
Quote:
Originally Posted by M. Krass (Post 551920)
They're about 2.5 lbs. without the motors. The motors themselves are about another 2.5 lbs. each, as I recall.
Thanks! I am just surprised they didn't give the dimensions and weight of the gearbox.

Rickertsen2 10-01-2007 02:43
Re: 2007 Motor Specs
 
I calculated the theoretical speed/torque/power curve for the RS-540. I would post a graph here, but right now all i have available is open office.org which isn't very good at drawing the graph scales the way i want it to. I can export it to xls or csv or something though.

It may not be exact but should be pretty close.
Code:
Note: Calculated @12V

Speed(rpm)        Torque (mNm)        Power(watts)
0                277.20000        0
100                275.55000        2.89
200                273.90000        5.74
300                272.25000        8.55
400                270.60000        11.33
500                268.95000        14.08
600                267.30000        16.79
700                265.65000        19.47
800                264.00000        22.12
900                262.35000        24.73
1000                260.70000        27.3
1100                259.05000        29.84
1200                257.40000        32.35
1300                255.75000        34.82
1400                254.10000        37.25
1500                252.45000        39.65
1600                250.80000        42.02
1700                249.15000        44.35
1800                247.50000        46.65
1900                245.85000        48.92
2000                244.20000        51.15
2100                242.55000        53.34
2200                240.90000        55.5
2300                239.25000        57.62
2400                237.60000        59.72
2500                235.95000        61.77
2600                234.30000        63.79
2700                232.65000        65.78
2800                231.00000        67.73
2900                229.35000        69.65
3000                227.70000        71.53
3100                226.05000        73.38
3200                224.40000        75.2
3300                222.75000        76.98
3400                221.10000        78.72
3500                219.45000        80.43
3600                217.80000        82.11
3700                216.15000        83.75
3800                214.50000        85.36
3900                212.85000        86.93
4000                211.20000        88.47
4100                209.55000        89.97
4200                207.90000        91.44
4300                206.25000        92.87
4400                204.60000        94.27
4500                202.95000        95.64
4600                201.30000        96.97
4700                199.65000        98.26
4800                198.00000        99.53
4900                196.35000        100.75
5000                194.70000        101.94
5100                193.05000        103.1
5200                191.40000        104.23
5300                189.75000        105.31
5400                188.10000        106.37
5500                186.45000        107.39
5600                184.80000        108.37
5700                183.15000        109.32
5800                181.50000        110.24
5900                179.85000        111.12
6000                178.20000        111.97
6100                176.55000        112.78
6200                174.90000        113.56
6300                173.25000        114.3
6400                171.60000        115.01
6500                169.95000        115.68
6600                168.30000        116.32
6700                166.65000        116.93
6800                165.00000        117.5
6900                163.35000        118.03
7000                161.70000        118.53
7100                160.05000        119
7200                158.40000        119.43
7300                156.75000        119.83
7400                155.10000        120.19
7500                153.45000        120.52
7600                151.80000        120.81
7700                150.15000        121.07
7800                148.50000        121.3
7900                146.85000        121.49
8000                145.20000        121.64
8100                143.55000        121.76
8200                141.90000        121.85
8300                140.25000        121.9
8400                138.60000        121.92
8500                136.95000        121.9
8600                135.30000        121.85
8700                133.65000        121.76
8800                132.00000        121.64
8900                130.35000        121.49
9000                128.70000        121.3
9100                127.05000        121.07
9200                125.40000        120.81
9300                123.75000        120.52
9400                122.10000        120.19
9500                120.45000        119.83
9600                118.80000        119.43
9700                117.15000        119
9800                115.50000        118.53
9900                113.85000        118.03
10000                112.20000        117.5
10100                110.55000        116.93
10200                108.90000        116.32
10300                107.25000        115.68
10400                105.60000        115.01
10500                103.95000        114.3
10600                102.30000        113.56
10700                100.65000        112.78
10800                99.00000        111.97
10900                97.35000        111.12
11000                95.70000        110.24
11100                94.05000        109.32
11200                92.40000        108.37
11300                90.75000        107.39
11400                89.10000        106.37
11500                87.45000        105.31
11600                85.80000        104.23
11700                84.15000        103.1
11800                82.50000        101.94
11900                80.85000        100.75
12000                79.20000        99.53
12100                77.55000        98.26
12200                75.90000        96.97
12300                74.25000        95.64
12400                72.60000        94.27
12500                70.95000        92.87
12600                69.30000        91.44
12700                67.65000        89.97
12800                66.00000        88.47
12900                64.35000        86.93
13000                62.70000        85.36
13100                61.05000        83.75
13200                59.40000        82.11
13300                57.75000        80.43
13400                56.10000        78.72
13500                54.45000        76.98
13600                52.80000        75.2
13700                51.15000        73.38
13800                49.50000        71.53
13900                47.85000        69.65
14000                46.20000        67.73
14100                44.55000        65.78
14200                42.90000        63.79
14300                41.25000        61.77
14400                39.60000        59.72
14500                37.95000        57.62
14600                36.30000        55.5
14700                34.65000        53.34
14800                33.00000        51.15
14900                31.35000        48.92
15000                29.70000        46.65
15100                28.05000        44.35
15200                26.40000        42.02
15300                24.75000        39.65
15400                23.10000        37.25
15500                21.45000        34.82
15600                19.80000        32.35
15700                18.15000        29.84
15800                16.50000        27.3
15900                14.85000        24.73
16000                13.20000        22.12
16100                11.55000        19.47
16200                9.90000                16.79
16300                8.25000                14.08
16400                6.60000                11.33
16500                4.95000                8.55
16600                3.30000                5.74
16700                1.65000                2.89
16800                0.00000                0

Joel J 10-01-2007 02:46
Re: 2007 Motor Specs
 
Where did you get these numbers? You tested the motor?

Rickertsen2 10-01-2007 03:10
Re: 2007 Motor Specs
 
Quote:
Originally Posted by Joel J. (Post 552882)
Where did you get these numbers? You tested the motor?
No, they are a purely theoretical APPROXIMATION based on the Kt, Kv and stall current posted on the bane-bots website.

They are based on a model which works pretty well for DC motors in which torque is porportional to current and back emf is porportional to motor rpm. This model does not take into account inductive effects or internal bearing resistance of the motor.

Kt is a constant of porportionality relating motor output torque to electrical current input.
Kv is a constant which relates the rotational speed of the shaft to the voltage generated by the motor.

torque = I*Kt
Induced back emf(voltage created by the motor) = shaft speed * Kv
r= internal resistance of the motor = supply voltage/stall current.

combine these three and you get
torque = Kt*(Vin-Kv*rpm)/r

then for mechanical power in a rotating system we have
power = speed * torque
so
power = rpm*Kt(Vin-Kv*rpm)/r

sorry ,that was a Terrible explanation, but its 3:29 am and i'm tired.

Arkorobotics 10-01-2007 19:02
Re: 2007 Motor Specs
 
Does anyone know if there are any regulations against buying more (12:1) BaneBot CIM Gearboxes? Would it be FIRST Legal to have 4 BaneBot Gearboxes? I can't find the rule to back this up.

Madison 10-01-2007 19:09
Re: 2007 Motor Specs
 
Quote:
Originally Posted by Arkorobotics (Post 553404)
Does anyone know if there are any regulations against buying more (12:1) BaneBot CIM Gearboxes? Would it be FIRST Legal to have 4 BaneBot Gearboxes? I can't find the rule to back this up.
They would be considered under rules governing COTS MECHANISMS and are legal to use.

Rob Colatutto 10-01-2007 20:48
Re: 2007 Motor Specs
 
So does anyone know if the Denso window motor is the same as last years window motor? Also, does anyone know where to get the spec sheets for the older style Keyang left/right hand motors? Thanks

Andrewpbhs 11-01-2007 14:17
Re: 2007 Motor Specs
 
Hey i need some help, im part of a 1st year rookie team and we need to find out the specs on all the motors. anyone who can help would have our extreme Gratitude!

Andrew

MattB703 11-01-2007 14:22
Re: 2007 Motor Specs
 
Quote:
Originally Posted by Andrewpbhs (Post 554039)
Hey i need some help, im part of a 1st year rookie team and we need to find out the specs on all the motors. anyone who can help would have our extreme Gratitude!

Andrew
On the FIRST.ORG site under the Team Documents section there is a link to a Guidlines and Best Practices file. In that file it lists all of the free speeds, stall torques, and max power ratings as well as some other key information for the motors in the kit.

Andrewpbhs 11-01-2007 16:30
Re: 2007 Motor Specs
 
thanks abunch!!

Lil' Lavery 11-01-2007 16:33
Re: 2007 Motor Specs
 
Quote:
Originally Posted by MattB703 (Post 554043)
On the FIRST.ORG site under the Team Documents section there is a link to a Guidlines and Best Practices file. In that file it lists all of the free speeds, stall torques, and max power ratings as well as some other key information for the motors in the kit.
www.usfirst.org actually

Rob Colatutto 12-01-2007 16:37
Re: 2007 Motor Specs
 
Does anyone happen to know specs on the pinion gear attached to the Keyang motor? Based on the outside diameter, I was able to figure out that it appears to be a 12 DP gear. If someone could verify this for me that would be great. But now that leaves the question of what pressure angle the gear is... does anyone know?

Also, as far as I can tell, this is very similar, if not equal to the Keyang model PWM-60B.
http://www.keyang.co.kr/english/prod..._code=E0201004

The torque curve data also matches up with what FIRST has published.

So pretty much, does anyone know the pressure angle of this pinion gear? If we knew then everyone could use it without the included plastic coupler and without making a custom coupler. Thanks.

sojouner06 12-01-2007 23:57
Re: 2007 Motor Specs
 
does anyone know where where I can get drawings/CAD/specs of the planetary gearboxes of the RS-540 motor? bane doesnt have it, neither does firstcadlibrary...it doesnt matter what ratio

AdamHeard 12-01-2007 23:59
Re: 2007 Motor Specs
 
Quote:
Originally Posted by sojouner06 (Post 555472)
does anyone know where where I can get drawings/CAD/specs of the planetary gearboxes of the RS-540 motor? bane doesnt have it, neither does firstcadlibrary...it doesnt matter what ratio
More Specifically, we need the dimensions of the placement of the #10-32 holes on the face of the planetaries. We have measured with calipers, but our values are kind of fuzzy and don't make sense to me. I'd like an official drawing or cad if there is one. I'll email baneots tonight I guess.

meglovesbots 13-01-2007 11:41
Re: 2007 Motor Specs
 
i found a really good old thread...it has the specs from last year which are most of the motors from this years comp.

its www.chiefdelphi.com/media/papers/1895

i also looked through more and found some from this year for mabuchi and for the newer fisher price

its www.chiefdelphi.com/media/papers/1384

if anyone has anything else, id love to have it!!

thanks!


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