A: Most likely a wiring issue. Swap either A+ with A- OR B+ with B-, but not both. Alternatively, the Enable signal may be de-asserted.
If you are still facing errors after following this guide, isolate the problem: Test the motor with a known working driver. If it spins, your GP L80180 hardware is faulty. If not, re-check your power supply and software pulse settings. gp l80180 driver
A: Absolutely. You must use a level shifter (3.3V to 5V) on the step/direction pins. The L80180’s opto-isolator requires at least 5mA; the Pi’s 3.3V GPIO cannot reliably trigger it without a buffer. Conclusion The GP L80180 driver remains a workhorse in the DIY CNC and industrial automation space. While the term "driver" often confuses hardware with software, the solution is methodical: install the correct USB chip driver, wire the hardware properly, and tune the microstep/current settings to your specific motor. A: Most likely a wiring issue
