# X Controller and 262oz Stepper
**URL:** https://community.inventables.com/t/x-controller-and-262oz-stepper/34400
**Category:** Uncategorized
**Created:** [February 23, 2017, 3:13am UTC](https://community.inventables.com/t/x-controller-and-262oz-stepper/34400 "2017-02-23T03:13:55Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@MRoss](https://community.inventables.com/u/MRoss)
#### Post date: [February 23, 2017, 3:13am UTC](https://community.inventables.com/t/x-controller-and-262oz-stepper/34400/1 "2017-02-23T03:13:55Z")
I am switch my X axis to a 262oz stepper as sometimes when I do a bit change X axis moves on me. But i noticed my original Vref1 to GND was set to .98 was that to low? My question is should I turn the Vref to 1.3V with the 262oz stepper as the voltage is different but the 140oz stepper amps are the same.
140 oz stepper
V=2.3
A=2.8
R=.83 Ohms
262 oz stepper
V=3.2
A=2.8
R=1.13 ohms
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### Author:  [@DouglasSchafer](https://community.inventables.com/u/DouglasSchafer)
#### Post date: [February 23, 2017, 3:30am UTC](https://community.inventables.com/t/x-controller-and-262oz-stepper/34400/2 "2017-02-23T03:30:43Z")
Amperage is your target so the VRef should be 1.3 for either of those motors. That voltage rating doesn’t really apply to what we are doing when using motor with a driver.
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### Author:  [@MRoss](https://community.inventables.com/u/MRoss)
#### Post date: [February 23, 2017, 4:06am UTC](https://community.inventables.com/t/x-controller-and-262oz-stepper/34400/3 "2017-02-23T04:06:30Z")
Thanks. So should I set all axis at 1.3 as the other 2 are 1.1 and .99
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### Author:  [@DouglasSchafer](https://community.inventables.com/u/DouglasSchafer)
#### Post date: [February 23, 2017, 4:27am UTC](https://community.inventables.com/t/x-controller-and-262oz-stepper/34400/4 "2017-02-23T04:27:50Z")
If all your motors are 2.8 amp then yes.