current set resistor

Mariss wrote: "The current set resistor tells the drive what current
to send to the motors. Use a 1/4W 47K resistor in the low current
jumper setting or an 8.2K if the jumpers are set for the 1A to 7A
range."

Do you mean to ignore the results from the above equation and to use
these (47k or 8.2k)?

Example, 5.1V 1A stepper

R = 47,000*1/(7-1) = 7.833k Use 8.2k ?

Example. 3.2V 2A stepper

R = 47,000*2/(7-2) = 18.8k Use 8.2k ?


I R
0.5 3.6
1.0 7.8
1.5 12.8
2.0 18.8
2.5 26.1
3.0 35.3
3.5 47.0
4.0 62.7
4.5 84.6
5.0 117.5
5.5 172.3
6.0 282.0
6.5 611.0
7.0 #DIV/0!

47k: low current jumper setting, 8.2k 1-7A (higher current?)

It appear that on should use higher resistance for higer current?

Don't understand.

Peter

> What is the purpose of the current set resistor in the
> Gecko stepper drives?
>
> (I am asking because I am trying to understand the
> formula R = 47,000*I/(2-I)