Hello

I'm just about order a victor and PWM unit from robot marketplace but before I do I'd like to find out how much postage I'm going to be looking at.
What have you guys been charged? I was thinking about $20-30US. Is that about right?

Also, I am going to get an 883, would that be enough for one gopher motor? Or should I go for an 885?

Aswell, is anyone going to be doing an order to servocity sometime? I'm after 3-4 1/4 Scale servos. Just thinking it might be a bit cheaper on postage!

Thanks
Simon

Last edited by WiperMotor on Fri Jul 11, 2008 6:53 pm; edited 1 time in total

The postage sounds about right - I just paid about $45, which included a heavy DeWalt motor.

Couple of questions: What is the PWM unit and a gopher motor?
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Originally posted by Nick:
The postage sounds about right - I just paid about $45, which included a heavy DeWalt motor.

Couple of questions: What is the PWM unit and a gopher motor?

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Looks like an 885 would be a smart move, particularly if this will be carrying any weight.
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UK 2016 Gladiator champion

quote:

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Originally posted by Nick:
Looks like an 885 would be a smart move, particularly if this will be carrying any weight.

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Hmm, I think you might want to check out the motor specs and gearing before you buy an ESC
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Hello again guys

Got my drive axel today, but as usual nothing ever goes smothly!

The unit was dilivered without brushes in the motor, so of course I have to find some! I rung up the manafacturer of the motor (EMP) and got some asian chick, I could not understand a WORD she said

Is there anywhere else in aus that keep brushes and caps?
Heres some pics, the mesurement of the carbon block is 6 x 12mm

Well according to the Ebay link, it was stated that the motor had no brushes...

quote:

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Gopher Wheels

Includes 2 X Wheels, 1 x Motor, Brushes have been removed (What you see is what you get!)

Working order unknown.

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quote:

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Originally posted by TDT:
Well according to the Ebay link, it was stated that the motor had no brushes...

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quote:

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Gopher Wheels

Includes 2 X Wheels, 1 x Motor, Brushes have been removed (What you see is what you get!)

Working order unknown.

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Someone either needed the brushes to fix another motor, or they couldn't fix this motor - neither option sounds good. I can just see in the photo that the motor is rated for 180W continuous, which is good & bad news: the good news is that a Victor 885 will barely get warm driving the motor, the bad news is that you have a very low power to be pushing a lawn mower around. It would have gone better with a couple of Oatley 300W scooter motors.

How about emailing the EMC people? http://www.emppl.com.au/contact.htm
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

quote:

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Originally posted by Nick:
Someone either needed the brushes to fix another motor, or they couldn't fix this motor - neither option sounds good. I can just see in the photo that the motor is rated for 180W continuous, which is good & bad news: the good news is that a Victor 885 will barely get warm driving the motor, the bad news is that you have a very low power to be pushing a lawn mower around. It would have gone better with a couple of Oatley 300W scooter motors.

How about emailing the EMC people? http://www.emppl.com.au/contact.htm

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Well considering the Oatley 100W motors are given that rating as a continuous rating too but I have tested them to be closer to 220W. There is a big difference between a continuous rating and the peak rating.
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Pushing a mower thru grass just seems a bit much for a 180W motor. Even if it was under rated, I'd think that much more power would be required. It would help to know the gear reduction and final wheel RPM - 180W would be more adequate with a larger reduction.
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dose a 16:1 ratio sound about right?

That depends; about right for what? With the motor going at 3,000, that would give you 187.5 rpm at the wheel.

Just had a thought: you said this was to push a lawn mower, what sort? If it is a regular 4 wheel model, you will have a hard time steering it. I just finished mowing the lawn today and it takes much more force to push a 4 wheel mower around a corner than in a straight line. If you are adding the extra driven wheels at the rear, I would suggest making an articulated frame and dropping the original back wheels.
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UK 2016 Gladiator champion