Dear all, The machine is assembled but makes some noise when I'm not moving it in any direction. Video file attached.
The DRV8825 drivers are known to cause a hissing noise Stepper drivers have an internal mechanism called a "current chopper" - some drivers operate at a much higher (inaudible) frequency, but the DRV8825s unfortunately has their oscillators running in the human hearing audible frequency range. It sounds like things are about to go wrong, but its pretty normal and one learns to live with it Some mitigation strategies: - If you breakouts allow you to change Decay mode, setting it to Mixed helps - Turning current down lowers the volume of the chopper noise - consider replacing them with quieter drivers (as a plus, the DRV8825s only put out about 1A before overheating, so investing in some DQ542MA Stepper Motor Driver will not only quiet things down but also increase available torque (3-fold) and improve reliability. You can wire them to an Arduino: See @Kyo 's video: How To Decrease Noise on Your Stepper Motor Driver – EBLDC.COM is a worthy read about it too
Sorry heard the hiss when you powered on (; Tic/Tac may be overheating: Driver overheats, cuts out, starts cooling down, when it drops below the treshold, re-enables: Cycle repeats over and over. Adjust current down (to below 1A) using the little potentiometer on the stepper drivers
So start off by checking your Y drivers (do they burn your finger?) and then play with the current adjustment potentiometers. Unfortunately those little breakout boards have really bad thermal management (PCB is too small to pull heat from the chip. Those chips do not heatsink through the plastic top, but instead through a thermal pad soldered to the PCB - wrote a lot more details about the root issue here: Y axis on a OX style machine)
