2007 Motor Specs

[Veselin Kolev]

This thread is for people to post specs of the 2007 motors.

New motors: the two banebots motors. spec spec spec!

I'm off to work spec-ing them up, will post.

[Gary Dillard]

Banebots RS-540 motor

Nominal v: 12v, No Load RPM: 16800, Stall Current: 42A
Kt: 0.94 oz-in/A, Kv: 1400 rpm/V, Efficiency: 71%

more info here

Motor Specifications

Performance
Operating v : 4.5v - 12v
Nominal v : 12v
No Load RPM : 16800
No Load A : 1A
Stall Torque : 39.48 oz-in 278.8 mN-m
Stall Current : 42A
Kt : 0.94 oz-in/A 6.6 mN-m/A
Kv : 1400 rpm/V
Efficiency : 71%
RPM - Peak Eff : 14525
Current - Peak Eff : 6.6A

Physical
Weight : 5.4 oz (153g)
Length - for motor : 1.97 in (50mm)
Diameter : 1.41 in (35.8mm)
ShaftDiameter : 0.12 in (3.2mm)
Shaft Length : 0.3 in (7.6mm)
Mounting Screws (2) M3



Banebots has added a link on their home page for FIRST teams, which goes straight to the parts included in the KOP.

[Xufer]

Looking at <R27> in section 8.3.4 leads me to believe that once again we have a different fisher price motor to spec out this year, unless its the same as the one we had two years ago because it says

Originally Posted by 8.3.4<R27>

"Note that the fisher price motor found in the 2007 kit of parts is different from the FP found in the most recent KOP"

If it is the same as 2005 does anyone still have the specs laying around?

[Paul Copioli]

We are back at it again. It does not look like FIRST has published the FP motor specs this year. I have searched through all my previous posts (back to 2002) and checked all the FP motor specs I have published in the past. This year's motor is different from the 2002, 2003, 2004, 2005, and 2006 motors.

One thing is certain: the motor is made by Johnson Electric. That is good news since I should be able to get the data from JE this week. Our gear on the motor is 19 teeth, but I do not know if everyone's is the same. I will post to this thread when I get the motor data.

[Nitroxextreme]

Does anyone know the motor specs on the Keyang Motor?

[Kit Gerhart]

Are we going to get power/rpm/ current curves on these RS-540 motors as we have in the past with new motors in the kit, or do we have to estimate it ourselves?

[Madison]

Originally Posted by Kit Gerhart

Are we going to get power/rpm/ current information on these RS-540 motors as we have in the past with new motors in the kit, or do we have to estimate it ourselves?

I think the information you're looking for is available on the Banebots website.

The gearmotors specs. can be found here: http://www.banebots.com/pc/MP-36XXX-540/MP-36064-540

The motor specs. without the gearbox are here:
http://www.banebots.com/p/M2-RS540-120

They don't have the curves themselves, but there's at least some information available.

[Kit Gerhart]

Originally Posted by M. Krass

I think the information you're looking for is available on the Banebots website.

The gearmotors specs. can be found here: http://www.banebots.com/pc/MP-36XXX-540/MP-36064-540

The motor specs. without the gearbox are here:
http://www.banebots.com/p/M2-RS540-120

They don't have the curves themselves, but there's at least some information available.

There is some info on the banebots site, but not the actual power information I'd like. Of course, if I get a little more ambitious, I can calculate a good approximation of what I'm looking for. I'd like to know the maximum power in watts or horsepower that the motor produces.

[Kevin Sevcik]

Power (output) it torque times speed. Well... Watts = N-m * radians/sec. or = N-m * RPM/60*2*pi.

RPM decreases linearly from no load speed at ... no load, to zero at stall. Thus, max power is always at half the no load speed.

Thus, Max power for the RS540 is ~122W.
The RS 545 is 108W.

This is, of course, highly approximate. But you really should be designing below Max power anyways, right?

[Tristan Lall]

Originally Posted by Paul Copioli

We are back at it again. It does not look like FIRST has published the FP motor specs this year. I have searched through all my previous posts (back to 2002) and checked all the FP motor specs I have published in the past. This year's motor is different from the 2002, 2003, 2004, 2005, and 2006 motors.

One thing is certain: the motor is made by Johnson Electric. That is good news since I should be able to get the data from JE this week. Our gear on the motor is 19 teeth, but I do not know if everyone's is the same. I will post to this thread when I get the motor data.

This is the Fisher-Price 00968-9012, one of the RS-550 Johnson motors allowed (but not supplied to all teams) in 2006. The 9003 (largely equivalent, and also supplied to some teams in 2006) is not legal. FIRST's 2006 spec sheet is here. To identify the number of gear teeth on the motor pinion, without disassembling it, examine the injection-moulded plastic gear housing, and look for a small number 19 (or 16, or 20) on the side. 188 received 19-tooth-compatible gear reducers.

[Kit Gerhart]

Originally Posted by Kevin Sevcik

Power (output) it torque times speed. Well... Watts = N-m * radians/sec. or = N-m * RPM/60*2*pi.

RPM decreases linearly from no load speed at ... no load, to zero at stall. Thus, max power is always at half the no load speed.

Thus, Max power for the RS540 is ~122W.
The RS 545 is 108W.

This is, of course, highly approximate. But you really should be designing below Max power anyways, right?

Thanks for doing the calculation for me. Yes, we design for well below peak power (motor running maybe 75-80 % of no-load rpm) except for an occasional few seconds of "extreme" operation near its power peak. Most of our motors will have a very short service life if run at their power peak.

[Arkorobotics]

Would it be legal to buy 2 extra 56mm Planetary Gearbox, 12:1? The same one included in the KOP?


Also, how much do these gearboxes weigh?

[Kevin Sevcik]

Perfectly legal. It's COTS item offered by BaneBots and it costs less than $400. Well. Perfectly legal as long as you still stay under your $3500 limit.

EDIT: I weighed them in at around 2.5 lbs apiece last night. The only scale I had was a bit nutty, so YMMV by +/- .25 lbs.

[Arkorobotics]

Originally Posted by Kevin Sevcik

Perfectly legal. It's COTS item offered by BaneBots and it costs less than $400. Well. Perfectly legal as long as you still stay under your $3500 limit.

EDIT: I weighed them in at around 2.5 lbs apiece last night. The only scale I had was a bit nutty, so YMMV by +/- .25 lbs.

Thanks! Does that weight include the CIM? If not what is the mass of the CIM motors?

[Madison]

Originally Posted by Arkorobotics

Thanks! Does that weight include the CIM? If not what is the mass of the CIM motors?

They're about 2.5 lbs. without the motors. The motors themselves are about another 2.5 lbs. each, as I recall.