Stepper motor driver А4988 on Ramps 1.4 smoked out. Why? Hey Guys, So I'm trying to get a Nema 17 stepper motor running on Ramps 1.4. I'm using a driver А4988 for that and a 12v power supply. When I connected the power supply only, everything seemed to work. The lights started blinking on both the Arduino mega and the Ramps boards, and my LCD came to life. After unplugging the power supply and connecting the driver as shown in the picture below, and connecting back the power supply I got smoke and a nice black spot on my driver. What did I do wrong? [attachment 119057 269683970_445265610473232_7680166367852868269_n.jpg] [attachment 119058 270085818_675005173493416_493667977508448406_n.jpg] https://reprap.org/forum/read.php?219,887739,887739#msg-887739 Tue, 11 Aug 2026 16:14:29 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,887739,887743#msg-887743 Re: Stepper motor driver А4988 on Ramps 1.4 smoked out. Why? https://reprap.org/forum/read.php?219,887739,887743#msg-887743 the Cable is Black, Green, Red and Blue.

[attachment 119060 Ramps.jpg]

[attachment 119061 Steper.jpg]

Check your wiring.]]> Roberts_Clif RAMPS Electronics Wed, 05 Jan 2022 21:11:16 -0500 https://reprap.org/forum/read.php?219,887739,887740#msg-887740 Re: Stepper motor driver А4988 on Ramps 1.4 smoked out. Why? https://reprap.org/forum/read.php?219,887739,887740#msg-887740 VDX RAMPS Electronics Wed, 05 Jan 2022 16:00:26 -0500 https://reprap.org/forum/read.php?219,887739,887739#msg-887739 Stepper motor driver А4988 on Ramps 1.4 smoked out. Why? https://reprap.org/forum/read.php?219,887739,887739#msg-887739
So I'm trying to get a Nema 17 stepper motor running on Ramps 1.4. I'm using a driver А4988 for that and a 12v power supply.
When I connected the power supply only, everything seemed to work. The lights started blinking on both the Arduino mega and the Ramps boards, and my LCD came to life. After unplugging the power supply and connecting the driver as shown in the picture below, and connecting back the power supply I got smoke and a nice black spot on my driver. What did I do wrong?

[attachment 119057 269683970_445265610473232_7680166367852868269_n.jpg]

[attachment 119058 270085818_675005173493416_493667977508448406_n.jpg]]]> iliyan.tanev RAMPS Electronics Wed, 05 Jan 2022 15:19:12 -0500