Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 04:12AM |
Registered: 9 years ago Posts: 41 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 01:30PM |
Registered: 10 years ago Posts: 580 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 03:02PM |
Registered: 12 years ago Posts: 2,470 |
If you bought the original RUMBA made by Reprapdiscount with the matching stepper drivers the potentiometer on the drivers faces away from the molex connectors.Quote
someoneonly
Hello, I bought a rumba board with DRV8825 stepper motor drivers and Im not sure which way the driver goes. Do I face the IC side closer to the molex connector or aways ?
Aslo, do I need to connect both main and heatbed power supply or will connecting main only do ?
Re: Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 09:29PM |
Registered: 9 years ago Posts: 41 |
Quote
Paul Wanamaker
I haven't used a Rumba in years (upgraded to a Smoothie), but perhaps this page will help:
[reprap.org]
Just in case you have a Delta: it's not recommended to use 1/32 microstepping with Delta printers (causes 2x the stepping load on the microcontroller), or graphical display.
Also, depending on your motors and voltage you may have some issues with missed microsteps with the DRV8825 drivers. This shows up as a repeating pattern in the perimeters. More info here.
Also, the DRV8825 drivers may make squealing noises. FYI: A4988 drivers are much better.
Try to always print from the SD card, much more reliable.
Hope that helps!
Quote
Srek
If you bought the original RUMBA made by Reprapdiscount with the matching stepper drivers the potentiometer on the drivers faces away from the molex connectors.Quote
someoneonly
Hello, I bought a rumba board with DRV8825 stepper motor drivers and Im not sure which way the driver goes. Do I face the IC side closer to the molex connector or aways ?
Aslo, do I need to connect both main and heatbed power supply or will connecting main only do ?
This is the diagramm that will help you.
[reprap.org]
Here you can see which pins of the driver belong where.
Re: Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 09:55PM |
Registered: 10 years ago Posts: 580 |
Quote
someoneonly
The shop I bought from left out 2 drivers so I will need to buy some more. Do you think that I could run DRV8825 drivers for the extruders and A4988 drivers for the xyz axis(to save cost) ? Or should I just replace all drivers by A4988 drivers ?
Quote
Someoneonly
I am pretty new to this but from what I understand the microstepping is put into prusa caculator and only used for steps per mm right ?
Re: Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 10:03PM |
Registered: 9 years ago Posts: 41 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 11:12PM |
Registered: 10 years ago Posts: 580 |
Quote
someoneonly
Just curious, I can wire up my meanwell 12v 17a directly to the board right ? I have looked around the place for similar power supply wiring but they all seem to wire it directly.
Re: Direction of DRV8825 stepper motor driver / Rumba power January 30, 2016 11:45PM |
Registered: 9 years ago Posts: 41 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 31, 2016 01:46AM |
Registered: 10 years ago Posts: 580 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 31, 2016 04:09AM |
Registered: 9 years ago Posts: 41 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 31, 2016 10:09AM |
Registered: 10 years ago Posts: 580 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 31, 2016 07:39PM |
Registered: 9 years ago Posts: 41 |
Re: Direction of DRV8825 stepper motor driver / Rumba power January 31, 2016 10:41PM |
Registered: 10 years ago Posts: 580 |
Re: Direction of DRV8825 stepper motor driver / Rumba power February 01, 2016 02:52AM |
Registered: 10 years ago Posts: 14,672 |
Quote
Paul Wanamaker
- The stepper motors and stepper motor driver chips will get MUCH HOTTER.
Re: Direction of DRV8825 stepper motor driver / Rumba power February 01, 2016 12:34PM |
Registered: 10 years ago Posts: 580 |
Quote
DC42
If that happens then I think your drivers are faulty, or the circuit that generates the voltage reference for them is badly designed. Increasing the supply voltage should make no perceptible difference to how hot the motors run, and only a small difference to how hot the drivers run.