<p>Stepper motors are not working when connected to RAMPS board in the X,Y,Z pins.</p>

<p>I used A4988 drivers and the Arduino board is an original version. I checked the input voltage to the RAMPS board, it's 12&nbsp;V. The bed and the stepper motors are working fine. I tried replacing the driver, checking with another RAMPS board, replacing the SMPS nothing has worked. I checked the input voltage of the arduino both the 5&nbsp;V and 3.3&nbsp;V pins are working fine.</p>

CC BY-SA 4.0
2020-01-21T07:11:32.510Z
VM (12 / 24V) is present on the driver? VCC (3.3 / 5V) is present?
Enable is LOW, and you're supplying signals to STEP?
towe
CC BY-SA 4.0
2020-01-31T04:18:31.727Z
I'd like to know what PSU power wattage you are using. It needs to be at least 240W (12V x 20amps). Make sure to match the PSU and the board. Do not use 24V PSU with 12v board without 12v mosfet.
D DD
<diy-3d-printer><ramps-1.4><arduino-mega-2650>
Stepper motors not working when connected to RAMPS 1.4
vidya
# Stepper motors not working when connected to RAMPS 1.4

(Asked by: username_0 on 2020-01-20)

Stepper motors are not working when connected to RAMPS board in the X,Y,Z pins.

I used A4988 drivers and the Arduino board is an original version. I checked the input voltage to the RAMPS board, it's 12 V. The bed and the stepper motors are working fine. I tried replacing the driver, checking with another RAMPS board, replacing the SMPS nothing has worked. I checked the input voltage of the arduino both the 5 V and 3.3 V pins are working fine.

**Tags:** diy-3d-printer, ramps-1.4, arduino-mega-2650
> **Comments:**
> **username_1**: VM (12 / 24V) is present on the driver? VCC (3.3 / 5V) is present? Enable is LOW, and you're supplying signals to STEP?  
> **username_2**: I'd like to know what PSU power wattage you are using. It needs to be at least 240W (12V x 20amps). Make sure to match the PSU and the board. Do not use 24V PSU with 12v board without 12v mosfet.  

---

## 0 answers

