I have 6A per phase motors and on the gecko G203V it says with that amperage use a current set resistor that is 282Kohms but the only thing close to this is 270Kohm or 300Kohm can i go with the 300Kohm or do i need to use the 270Kohm
How do I obtain 3500 ohm resistance? My motors are 4A but being run on a
G540 so 3.5A max........3.5 x 1000 = 3500 ohm or 3.5k ohm? What combination of common values will give me the above?
I was going to give a link to Mouser electronics, but then noticed you were in the UK.
I've been hunting for a supplier that has 3.2k in single qty. Mouser and Digikey has a min order of 1000 pcs. Don't need 1000 resistors. Although I was able to get 2.8k in single qtys. from Digikey.
Mouser does offer 3.5k in singles (Digikey 1000 min)
Sorry I couldn't help, Maybe somebody will be able to,
Walking is highly over-rated
I believe I can get 3.48k ohm from RS here in the UK with 0.125w rating. I guess the resistance is ok - what about the rating? Will this be sufficient for a current set device? RS will happily sell in 10's and then only cost pennies / cents - as you say don't really need 999 spares !
G540 Manual - (The resistor can be from 1/10 W to 1/2 W in size and 1% to 5% tolerance.)
1/10W(.100) - 1/2(.500)
.125 falls inside the range given in the manual
Walking is highly over-rated
will these resistors work for a 6.1amp motor setting on G203s? Might be a good source for others as well, as 5 pieces is just right, and they are cheap! The metal film is fine to use, right, i mean it doesn't matter what type of resistor does it? Also it has 1% instead of 5% tolorence, but thats fine, or even better, right?
280k for 6a motor
316k for 6.1a motor (318.5k is equation answer)
Last edited by Wolfesmetalfab; 12-07-2008 at 08:57 PM.
Metal film resistors with leads may have too much inductance for high frequency circuits but should not be a problem for these drives. Depends on the circuit design's sensitivity to small inductance values.
An online parallel resistance calculator is at http://www.1728.com/resistrs.htm and can calculate for up to 10 resistors in parallel. If you need something like 3500 ohms (3.5K) double that value (7100) to start with. Then pick the next higher and the next lower standard resistance values and see what that gives you. You can then raise the higher standard value to the next higher value again to raise the parallel resistance, or lower the smaller value resistor if you need to achieve a slightly lower parallel resistance.
on the G201, if you link a motor of 6A, shall the set resistor set for 6A or 67% of 6A?
Last edited by hpghost; 12-23-2008 at 12:57 PM.
It should be set at 6 amps, or you will limit the motors top performance. That is a good question though, sounds like something I would come up with, after overthinking a situation! LOLon the G201, if you link a motor of 6A, shall the set resistor set for 6A or 67% of 6A?
The 67% rule for power supply, is because you are never going to be pulling the full load on every motor, so you dont need to have enough power to do so, but the individual motors may pull 6 amps or close every once and awhile, thats why you need to have the current set resistor set at 6 amps in your situation.
Does that make sense?
I was on that understanding an your confirmation is good.
will go ahead with this setting