On this step, 6 connections are required. Obviously they don't have the same form factor, so we have to improvise. Recall that instead of the A4988, we are using the TB6560. On the RAMPS/GRBL shield, there are 2, eight-pin connectors for where the A4988 motor drivers are meant to connect. The picture on this step shows all the necessary connections.
It is rather simply, and makes everything less self-contained, but overall it will significantly increase torque and ease of configuration of larger motors. This instructable goes through the wiring procedure for using all of the same electronics as if you used an Arduino/RAMPS/GRBL/A4988 (obviously not both RAMPS and GRBL), but replaces the tiny A4988 with a large, useful driver called the TB6560. The TB6560 single-motor driver board (not one with a parallel port that is designed as an all-inclusive controller board) is cheap and great! The RAMPS/GRBL driver/breakout boards, when connected with an Arduino and have the GRBL/RAMPS firmware, work great and have widespread support. The Important Part (TL DR): The A4988 stepper driver sucks for many reason. As there was almost no documentation anywhere online, I set out to make this instructable. After setting them up, I decided to try one out on my second 3D printer (a cheap delta on which the extruder stepper motor skipped during fast printing).
I ordered up 5 of them and fell in love a couple hours after setting them up as they fixed all my problems. But I still wanted to use the Uno and the GRBL shield from eBay because they had worked flawlessly on the laser engraver.Īfter hours of research, I discovered cheap $5 single-axis stepper drivers on eBay called the TB6560 Stepper Driver. This caused nothing but problems, and after hours of frustration at these little, underpowered devices, I decided there must be a better way. With 3A 24v NEMA23 steppers, the intention was to use the exact same electronics and just turn up the little power controls on the stepper drivers. I never had an issue.įollowing this success, I decided to get a CNC though. I used an Arduino Uno with the super cheap GRBL shield and A4988 drivers available on eBay (<$10 worth of electronics to control this project). After a few tries, it came out nearly perfectly. I decided to print myself a laser engraver that used NEMA17 stepper motors. For two years I played with it, adding minor upgrades like a heatbed. I first bought a Printrbot that worked perfectly out of the box. I developed an obsession with laser engravers and CNC routers and 3d printers.
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