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« on: August 24, 2012, 05:51:39 PM »
ajith
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  need a 550 size johnson motor ...    Help Me

does any one know where we can get those ... ?

any one having in spare & willing to sell ... ?
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« Reply #1 on: August 25, 2012, 09:41:43 AM »
lastRites
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Can you post an indicative pic? And required power? I may have some laying around..
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« Reply #2 on: August 25, 2012, 03:10:08 PM »
ajith
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  similar to these  used by VC sir ....

does any one know where to get those .. ??  Bang Head

DSC06466.jpg
Re: Need 550 size motor
* DSC06466.jpg (52.63 KB, 800x600 - viewed 381 times.)
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« Reply #3 on: August 25, 2012, 04:18:37 PM »
lastRites
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I have got them but the shipping cost will be more than the motor's price Tongue Look in the toy motor section of vegarobokit or dc motor section of either nexrobotics or other online roboshops. This motor is quite common. Another option is to browse your local electronics market(every major city has one of those Tongue) where all your city's electronic junk(old printers, junked pcs ) go. I got some great motors(mabuchi, jhonson, pittman, japan servo to name a few) from my local market for less than 100 bucks apiece Tongue Best of luck!
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It is the pervading law of all things organic and inorganic,
Of all things physical and metaphysical,
Of all things human and all things super-human,
Of all true manifestations of the head,
Of the heart, of the soul,
That the life is recognizable in its expression,
That form ever follows function. This is the law.
 

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« Reply #4 on: August 25, 2012, 06:17:05 PM »
ajith
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can you see if u have  any one with these specs .... that i'm in need  Hats Off


Johnson:

Can dia: 40mm
Can length : 65mm
weight 180 gm

all this is only for motor . no gear assembly and all ......


(Pic  from  VC sir's  hover craft  ...)

DSC06466 - Copy.jpg
Re: Need 550 size motor
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« Reply #5 on: August 25, 2012, 07:25:01 PM »
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Ajith, I am expecting some royalty from you for using my photographs and their edited versions! Wink
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« Reply #6 on: August 26, 2012, 06:49:06 PM »
ajith
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 sure  VC sir ....
      i will name my hovercraft after  you  Bow
          you are  inspiring us for a lot of things .....

but  first  i need to get the motor ....  Bang Head Bang Head
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« Reply #7 on: August 27, 2012, 05:45:26 AM »
lastRites
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http://www.vegarobokit.com/index.php?route=product/product&path=35_49&product_id=169
The given product picture is wrong. The original motor has a black baseplate and heavy duty carbon brushes. If you want I can upload the original pic. But you first need to tell me the power requirement/rpm of the motors. Maybe VC can enlighten us with the specs Grin
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It is the pervading law of all things organic and inorganic,
Of all things physical and metaphysical,
Of all things human and all things super-human,
Of all true manifestations of the head,
Of the heart, of the soul,
That the life is recognizable in its expression,
That form ever follows function. This is the law.
 

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« Reply #8 on: August 27, 2012, 04:32:48 PM »
ajith
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 thanks  lastrites ....   can you post the dimensions of the motor ? the one you have ...  Salute

the one i'm looking for is  similar to this ....  i badly need it ...   Help Me

Capture.jpg
Re: Need 550 size motor
* Capture.jpg (45.76 KB, 601x675 - viewed 293 times.)
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« Reply #9 on: August 28, 2012, 07:16:28 AM »
lastRites
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The can length is around 5cm. Unsure about the stall current though.. more than 20A definitely.

P28-08-12_07.21.jpg
Re: Need 550 size motor
* P28-08-12_07.21.jpg (26 KB, 709x383 - viewed 287 times.)
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It is the pervading law of all things organic and inorganic,
Of all things physical and metaphysical,
Of all things human and all things super-human,
Of all true manifestations of the head,
Of the heart, of the soul,
That the life is recognizable in its expression,
That form ever follows function. This is the law.
 

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« Reply #10 on: August 29, 2012, 05:16:37 PM »
ajith
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 seems  it is not the one i'm looking for ...  Undecided

contacted  some local  Electric Hard ware shopkeepers , one of the said that  he can get it  ( from some hand held vacuum cleaner manufacturer   Head Scratching Head Scratching ... ... .. ..  )                          but takes 10-12 days  and price around  550  Indian Rupees  not sure yet  !!   Roll Eyes

seems  i have to wait for 12 more days .....  Sad Sad
« Last Edit: August 29, 2012, 05:29:29 PM by ajith » Logged
 

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« Reply #11 on: August 29, 2012, 10:01:05 PM »
lastRites
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Did you mention the stall current of 85A? Grin
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It is the pervading law of all things organic and inorganic,
Of all things physical and metaphysical,
Of all things human and all things super-human,
Of all true manifestations of the head,
Of the heart, of the soul,
That the life is recognizable in its expression,
That form ever follows function. This is the law.
 

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« Reply #12 on: August 30, 2012, 04:13:33 AM »
KALYANPRODHAN
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Information sharing improves knowledge of both.



Yes,
Ia = (V - Eb) / Ra
where, Ia = Armature Current, V = Supply Voltage,
Eb = Back EMF due to rotation of armature within magnatic field.
Ra = Armature Resistance (In detail, it incorporate brush contact resistance.

Now, At blocked rotor/armature condition, Eb = 0 and current become maximun, and that is stall current.

It is a parameter only but it cannot be withstand by armature winding / brash commutator contact for long and burnt will occure (That is why brushless comes).

You will find this motor inside printer (HP610, 640, 670C, 810, 840, 930) for carrage movement motor with gear train. Similar motor (Except high power) you will find in Xerox machine. Just search, where second-hand defective machines are desmantelled (Like wellington area of Chandni Chawck) of our Kolkata. You need inly the set up of grars withen a gear box.

Good luck.
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