Hello,
this is (probably) off topic, been seen that happen. If it is please
ignore it.
I am building a "motorized" telescope mount (dobsonian) with what is
called an equatorial platform, it has 3 axis which I am going to drive
with stepper motors.
The stepper motors I use with a stepper driver, those common DM542 ones,
the stepper motors themselves are 2A and 1.8 degrees per step.
What I want to accomplish with the equatorial platform) (it compensates
for the rotation of the earth) is that, the start and end position
accuracy is not that important, smooth and constant/consistent movement
is. for the azimuth/altitude precision is not a really big deal, but
you'd want to move these 2 axis somewhat swift.
So there are a few factors to decide.
I probably want micro stepping, what settings on the driver for pulses
per rev, is best to use (or is that just trial and error?)
As with PWM itself, I am probably just not too familiar with it. From
what I understand, the voltage I use for the motors determines how fast
I can go (I am going to use a 48V switching power supply).
as for PWM, I can of course change the length of the pulse itself
and, independently, change the time between two pulses. What is the
relation ship there? WHat does a longer width of the pulse itself do?
and what exactly does a longer gap between the pulses do (of course the
wider the gap between two pulses the slower the motor turns).
for, especially, the equatorial platform, I want to avoid "jerking" it,
meaning starting and stopping the stepper motor as little as possible
and just go at a 'slow' constant speed.
sorry if totally of topic....
thanks,
Ron
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