[gunlocators]

I have a 540 and memo 23 282 steppers 48v ps schematics call for 1/10 to 1/2 watt resistors what size do I need and will any one work from radioshack or OD there other specs the resistor must have thanks in advance

[Fixittt]

what amp rating are your steppers?
my 269`s are 2.8 amp steppers. so you would need 2.8K or lower resistors. My local rat shack only had 2.2K so I used those to get up and running. the resistors will be rated in wattage on the package.....

Its a fair assumption to not guess at this. You need to know the ratings on the steppers. Damage can happen.

[gunlocators]

what amp rating are your steppers?
my 269`s are 2.8 amp steppers. so you would need 2.8K or lower resistors. My local rat shack only had 2.2K so I used those to get up and running. the resistors will be rated in wattage on the package.....

Its a fair assumption to not guess at this. You need to know the ratings on the steppers. Damage can happen.

I must be missing the amps it is KL23H276-30-8B (1/4" Dual Shaft with flat) Specification Price: $39

On KelingInc.net site

[gunlocators]

Ok I think I found the AMP Ratings

UniPolar 2.7V 3A
BiPolar Series 3.86V 2.1A
BiPolar Parallel 1.93V 4.2A

Found Info at http://www.kelinginc.net/KL23H276-30-8B.pdf

I do not know how which setup uni bipolar series parallel to use

The which resistor to get

[jalessi]

If you wire them in bi-polar parallel they are 4.2 amp

Since the G540 max output is 3.5 amps you would use 3.5K resistors to obtain maximum performance with the combination you have.

Jeff...

[jalessi]

The G540 is a bi-polar drive you can not wire it for uni polar.

Jeff...

[gunlocators]

Jeff my Yahoo seems to be not working thank you for the info Now I have to learn to wire the 8 wire steppers to the connector properly

[CROSSHATCH]

Gun- I have the same set-up as you:

Pin 6: Brown/Orange
pin 7: Black/White
pin 8:Blue/Yellow
pin 9: Red/Green

Pin 1 to 5 : 3.5K resistor (2,3,4 not used)



This set-up flies on the 540! Trust me



-Jason

[gunlocators]

One more question I went to radio shack biought 2 packs of resistors. Both are 3.3k 5% Tolerance one set is 1/4 watt the other 1/2 watt. Which would be better to use.

[TOTALLYRC]

I have a 540 and memo 23 282 steppers 48v ps schematics call for 1/10 to 1/2 watt resistors what size do I need and will any one work from radioshack or OD there other specs the resistor must have thanks in advance

One more question I went to radio shack biought 2 packs of resistors. Both are 3.3k 5% Tolerance one set is 1/4 watt the other 1/2 watt. Which would be better to use.

See your first thread for the wattage.
It won't make a difference. All that the resistors due is set the current limit in the hardware. They are not in the motor circuit they are just controls so you don't have to worry about burning them out.

I would use a ohm meter to verify the resistance before using them.
It doesn't happen often but sometimes they get packed wrong and you would not want to over amp the motors.
Mike

[jalessi]

Jason,

The half watt resistors are double the capacity, so use them even though it probably wont ever make a difference.

Jeff...

[jalessi]

TOTALLYRC Mike,

Sorry. I did not mean to step on your toes.

I was posting a answer the same time as you did.

Jeff...

[TOTALLYRC]

Jalessi
I always were steel toe shoes. even when posting. LOL
SAFTEY FIRST.

I always welcome different points of views on how to do things, otherwise how will I learn?. Mike

[gunlocators]

thank you guys

[Mariss Freimanis]

1/4 Watt resistors are physically smaller and easily fit between the DB9 connector pins 1 and 5. 1/2W resistors are too big to easily fit and may even interfere with the supplied DB9 connector clam-shell covers. If they do, the pressure from the clam-shells may push the resistor leads into contact with the motor wire connections. Please use 1/4W or smaller resistors for setting the axis current.

Mariss