Problems with drv8825

Mostly Printed CNC - MPCNC Troubleshooting
1

Hello guys, a newer here.

I try to do my vicious cnc but i stop on electronic part.

I have 5 nema 17 with 3.1v, 2.5A, i use arduino mega 2560, ramps 1.4 and a drv8825.

When i make the connections my stepper doesn’t works good, don’t rotate more than one step and the resistence stay hot.

i try to work with 1/32 Steps with all jumpers.

I make the calculations of Vref.

V * A = w

3.1 * 2,5 = 7,5 W

7,5/12= 0.646 Vref.

When i work with parallels steppers how much i put?

Thanks for all

2

I would just start at 0.7V, it can be changed later if you need to.

3

Hello, i just put this and the stepper only work for one side.

I instal repeater host on arduino and the stepper works good.

Probably the problem stay on de Marlin.

What version i would be instal for its works good? I think the rc8 have some problems. I try to put B16_32_8mm-LCD-112515 but erro with arduino version 1.8 and 1.6.11.

How can i fix this problem?

Thanks

4

Use RC7, you will need to edit the z steps before flashing if you are using 8mm rods.

5

I cant install this version! The arduino make a error when try to send for hardware! Another problem stay on parallels conection of steppers! Only one work!

Thanks for all

6

What is the error it displays when the compile fails?

7

ok, i just see the error and install the file.

But i continue without can’t put parallels conection of steppers.

Thanks for all