print moving upward as printed

[Roberts_Clif]

No V-Ref is a Controller voltage reference adjustment on the Stepper motor Driver module or Controller PCB.

Warning Use lowest V-Ref Voltage possible for proper operation.


This is how I learned to adjust my stepper motor current when I started.
https://www.youtube.com/watch?v=XU6lgFeZ7ZQ

My Controller card here
https://www.youtube.com/watch?v=8K3m6-kOoWw


This is how I make sure not to Over Drive the Stepper Motor or Stepper motor driver modules.
Look at you stepper motors you may have all the same or like myself you different steppers for Z-Axis.

Post or look up the steppers specs, mainly the stepper current.
Using the formula V-Ref = Stepper Max Current * 8 * Rs you can calculate the Max V-Ref setting.

A4988-Reprap-Motor-Driver-Module.jpg
In image above you will see a sample A4988 Driver module S1X and S2X are Rs = .1 Ohm.
Using my Stepper motor as an example it max current is 1.5A

1.2V max = 1.5A * 8 * .1 never run anything at max, 80% is a good point 0.96 V-Ref = 1.2V * 80%
This is just a learning information. As I can run my 3D Printer any where from .395 to .960v

I have been running one machine at .695 X,Y,E 1.396 Z for 2 years and the Other at .395 X,Y,E .710 Z for the last year with no problems.

Of course the lower you can operate your 3D Printer stepper motors the longer the 3D Printer should last.
while printing you can check the drivers to see if they are getting hot, if so reduce the V-Ref current.
Some 3D Printer users also stick a self adhesive heat sink fin and use cooling fans.
Over driving the Stepper will destroy them and most likely the stepper motor driver modules.

[adam120674]

Don't have any pot adjustments on my board.I do have 1 on my power supply . Though his would have been a good first printer to get familiar with. Looks like I bought a piece of crap.
here is what my board looks like. Thanks 4 any help.

board.jpg