On 12 Feb 2008 at 18:03, [EMAIL PROTECTED] wrote:
EMC can do PID just fine. It's steppers that can't. Steppers lose
torque as the speed increases. There is no way around this, it's just
the physics of the motor.
Did someone rewrite the spec for PID?
used to be a way of correcting a
[EMAIL PROTECTED] wrote:
On 12 Feb 2008 at 18:03, [EMAIL PROTECTED] wrote:
EMC can do PID just fine. It's steppers that can't. Steppers lose
torque as the speed increases. There is no way around this, it's just
the physics of the motor.
Did someone rewrite the spec for PID?
Am 13.02.2008 um 11:41 schrieb [EMAIL PROTECTED]:
On 12 Feb 2008 at 18:03, [EMAIL PROTECTED]
wrote:
EMC can do PID just fine. It's steppers that can't. Steppers lose
torque as the speed increases. There is no way around this, it's
just
the physics of the motor.
Did someone
On Wed, 13 Feb 2008, Dave Engvall wrote:
EMC can do PID just fine. It's steppers that can't. Steppers lose
torque as the speed increases. There is no way around this, it's
just the physics of the motor.
PID loop will attempt to correct for a lagging motor by requesting
more effort
Hi all,
While this list is essentially a list for EMC controller discussion
an occasional passing word on precision and accuracy might be
appropriate.
Definitions:
accuracy : the ability to hit the blueprint values
precision: your repeatability
You can adjust your code to hit the spec
[EMAIL PROTECTED] wrote:
On 12 Feb 2008 at 18:03, [EMAIL PROTECTED] wrote:
EMC can do PID just fine. It's steppers that can't. Steppers lose
torque as the speed increases. There is no way around this, it's just
the physics of the motor.
Did someone rewrite the spec for PID?
No.
On Wednesday 13 February 2008 15:40, Stephen Wille Padnos wrote:
I'm starting to suspect that EMC is a project that started out, not to
emulate the commercial equivalents, but built bit by bit to do various
things on the cheap, I'm starting to suspect that EMC is not a realtime
machine
Kirk Wallace wrote:
I think Tormach has a fairly compelling argument for steppers here:
http://www.tormach.com/document_library/TD30204_DesignAnalysis.pdf
Starts on page seven, though I think the whole document is worth while.
Second that - I read the whole thing a few weeks ago. Its
