right that is how most people use it... BUT it would still be hard to
calibrate the movement to the earths rotation.
and also .. I just want to do it with steppers :) I am weird
On 7/10/20 8:14 PM, Ken Strauss wrote:
You could use the DC motor + PID exactly the same as using steppers. With the
encoders you would always know the exact angle though which the motor had
rotated. The advantage would be the lack of any jerks in motion which are
inherent with a stepper. Have you considered using the Clearpath units? See
https://www.teknic.com/
-----Original Message-----
From: R C [mailto:cjv...@gmail.com]
Sent: Friday, July 10, 2020 10:05 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] off topic: pwm with a stepper driver/motor
yep.. true.. but it is also knd of what I do for a living...
I think it can be done, to build an equatorial platform, and really
control it's speed/angle over time.
On 7/10/20 7:52 PM, Ken Strauss wrote:
I also waste a lot of time exploring different ways of doing things but
frequently end up doing it the traditional way. One should never just
accept
"how it is done" but for many (most?) things there are good reasons for
traditional ways.
-----Original Message-----
From: R C [mailto:cjv...@gmail.com]
Sent: Friday, July 10, 2020 9:43 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] off topic: pwm with a stepper driver/motor
I don't think anyone did, but I know that's how most do it...
But that's just too easy :) I would just like to see if I can do it,
killing time
On 7/10/20 7:39 PM, Ken Strauss wrote:
I haven't been following this closely but has anyone suggested that you
use a
DC motor with an encoder? With a PID loop and PWM power to the
motor
you could
run the motor continuously. DC motors with integrated encoder and
planetary
gearbox are readily available for a few dollars. Just a thought.
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