Here is a different way to control a stepper motor. This control method
treats the stepper as if it is just a plain old BLDC motor but with 50
poles and 2 phases. Positional accuracy is determined by an encoder, not
the number of steps as the controller is not doing "steps" but using the
motor
(EMC)
Subject: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and
Stepper motors.
[EXTERNAL EMAIL] Be sure links are safe.
Here is a different way to control a stepper motor. This control method treats
the stepper as if it is just a plain old BLDC motor but with 50
poles and 2 p
xt. 2031
>
> -Original Message-
> From: Chris Albertson
> Sent: Tuesday, January 11, 2022 2:06 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and
> Stepper motors.
>
> [EXTERNAL EMAIL] Be sure lin
On Wed, 12 Jan 2022 at 01:28, Chris Albertson wrote:
> This library would allow the stepper to be commanded
> as if it were a serial interfaced servo motor.
In principle so does LinuxCNC HAL and the "bldc" HAL component.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
So how would I connect the four wire stepper motor to my PC to allow for
software commutation and continuous rotation of a stepper?
If this works, it could save people money by eliminating the need for a VFD
spindle drive and also
People are paying quite a lot for these self-contained "closed-loop
rtson [albertson.ch...@gmail.com]
Sent: Wednesday, January 12, 2022 5:41 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and
Stepper motors.
CAUTION: This email originated from outside the Walla Walla University email
system.
So how wo
; From: Chris Albertson [albertson.ch...@gmail.com]
> Sent: Wednesday, January 12, 2022 5:41 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC
> and Stepper motors.
>
> CAUTION: This email originated from outside the
12, 2022 6:57 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and
Stepper motors.
CAUTION: This email originated from outside the Walla Walla University email
system.
Thanks, this might be of value to someone who wants a VFD for th
John Figie
Ralph Stirling wrote:
>
>
> Personally, I am more interested in the approach you've been
> advocating for years, of having a microcontroller per motor handling
> commutation and drive, with the Linuxcnc/Mesa setup sending
> step/direction pulses or communicating via sserial or Ethercat
Interesting so far...
> From: Ralph Stirling [mailto:ralph.stirl...@wallawalla.edu]
>
> Linuxcnc with the bldc component can certainly drive an induction
> motor or other 3-phase motor as a variable frequency drive, but I
> have never heard the term "VFD" used for driving two-phase steppers
> befo
d require some
> design hardening.
>
> The bldc hal component is great for experimenting with driving brushless
> motors, though, if you don't need phase current feedback in your control
> scheme.
>
> -- Ralph
>
> From: Chris Al
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