Re: Onstep First testing question #EQ5
On Fri, Jun 11, 2021 at 01:24 AM, Hemendra Rawat wrote:
Let us do the math.
Your motors are maximum 0.9A current.
We want to run them at 50% (to start with).
So 0.9 X 1.41 X 0.5 = 0.635A
The LV8729 Vref formula is:
0.635 / 1.1 = 0.577 V
So you need to set your vref to 0.577 V
Then, change the following in your Config.h file:
#define STEP_WAVE_FORM PULSE // allows faster pulsing during slewing (60% more)
Then disable the different microstepping in case that is stalling (see below).
#define AXIS1_DRIVER_MICROSTEPS_GOTO OFF
#define AXIS2_DRIVER_MICROSTEPS_GOTO OFF
In your video the mount overshoots, not undershoots. Because after the second star, it is pointing
below the horizon. So not sure what is going on.
I do hear some whining noise mid slewing, but it is not really high, and I don't see the mount stopping.
But to rule out the different microstepping causing a stall, do the above changes, and try again.
Test and see if things are better.