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Building Resources

Building Resources

Category

Page 2 of 2
Here you will find tips and tricks designed to save you time, money and frustration

Wiper motor => mandatory ground isolation

Follow the advice of @bsft or you will fry your Hbridge
ground isolation is mandatory!

Explanations:
it's mandatory because with 2 motors connected to ground, when the Hbridge will drive one motor reverse and the other forward, the 12V and 0V will be connected together through the structure
-> short-circuit!

@Zed: You actually want to disconnect the ground for use with H bridges. The whole reason to use an H bridge is to be able to reverse motor polarity so so it goes the other direction. When you reverse the polarity of the applied power, the motor frame can become “energized”. If it is mounted to a metal frame with another motor powered up the other polarity, you get a short from power to ground and can blow electronics. I used energized/power and ground to denote polarities, but it’s also +/- or however you want to think of it. In a car, the motors that use their frames as a connector all just run one way.

@bsft: from here
With wipers, a large passenger car is usually good or a small truck , but use 12v for 12v. DO NOT USE 24v motors on 12v, all you do is half the speed and half the power. Waste of time.
Yes you do need to earth isolate the metal body of the motor as well.

Follow @eaorobbie picture:
[​IMG]​

@insanegr: from here
in your case as someone said before you have to find which is ground - low speed- and high speed and mark them.(you don't need low speed at all only high speed)[​IMG]
then test with a multimeter(buzzer Ω) that you don't have any contact between the case (body of motor) and three cables.if you don't hear anything you are OK if you hear the buzzer on the multimeter you have to isolate the motors.
1.get your motor [​IMG]
2. open it [​IMG]
3. find the brush that's connected on the body [​IMG]
4. cut it [​IMG]
5. solder a wire directly on the brush [​IMG]
6.close it and you are done [​IMG]​
#25

DC motors shopping list

China - 12V24V worm small gear reducer motor 250-350w 25A available in 25:1, 30:1, 50:1, minimum order of 5, FOB Price: US $80 - 90 / Piece, Shipping to: Worldwide

http://dakemotor.en.alibaba.com/pro...2V24V_250W_worm_small_gear_reducer_motor.html

[​IMG]

WG73BD76-1 Getriebemotor 73mm 2-24V 80W 30Nm 180U/min
cost EUR 54,95 + Shipping: EUR 16,99 DHL Paket International | More Details Location: Engen, Germany Shipping to: Worldwide

http://www.ebay.de/itm/WG73BD76-1-G...252006?hash=item33aeef52e6:g:nYMAAOSwYHxWNAJW
$_57.JPG
USA Bodine 42A3BEPM-E3 12 Volt VDC 41 RPM 5/8" HIgh Torque 23 Amps
cost US $57.20 + shipping cost

http://www.ebay.com/itm/Gearmotor-1...42A3BEPM-E3-/291306026001?hash=item43d3313411

[​IMG]
Canada Worm Drive Motors, 12V DC, 150-160RPM 25:1
cost US $99.99 + shipping cost

http://www.ebay.com/itm/GEAR-MOTOR-...384?pt=LH_DefaultDomain_0&hash=item51bd392f00

[​IMG]

Canada Worm Drive Motors, 12V DC, 75-80RPM 50:1
cost US $99.99 + shipping cost
http://www.ebay.com/itm/GEAR-MOTOR-...L-FEED-SIMULATOR-75-80RPM-50-1-/371596157992?

[​IMG]
UK Worm Drive Motors, available Left & Right hand, 12V DC, 80RPM, Peak Torque: 30Nm, Gear Wheel Material: Delrin
cost GBP 65.00 Approximately US $103.21 + shipping cost

http://www.ebay.com/itm/12V-DC-Gear...893?pt=LH_DefaultDomain_3&hash=item58c73b3b85

http://www.ebay.com/itm/12V-DC-Gear...270?pt=LH_DefaultDomain_3&hash=item58c73b352e

[​IMG]

Worm Drive Motor 12V/24V 200W, 180 RPM, 20Nm Torque
cost AU 109$ + shipping cost
http://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html
motiondynamics.png

SWF VALEO NIDEC ITT 404.458 gearmotor 24V DC 12N.m irreversible
(for reference only because it's discontinued now)
http://www.smolka-berlin.de/onlines...cteur_24V_DC__Offre_sp%E9ciale%21%21%21_/4398
imagedisplay.inc.jpeg

12/24V 350W 22.5Nm Torque Ratio 50:1 (others available)
cost varies depending on specs, see here for some indications of cost and shipping: $155 - $210 depending on specifications.
http://longway.en.alibaba.com/produ...&edm_cta=read_msg&edm_time=realtime&edm_ver=e
[​IMG]

Winches on ebay
cost 65$ up t0 100$
Do not use winches with more than 2000lb! (750 Watt) = 60A current, 120A peak
IMPORTANT: read here
www.ebay.com search item
winch.JPG
#32

Sim building tutorials

#48
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