On 11/1/23 16:20, fxkl47BF--- via Emc-users wrote:
anyone here have any experience with this controller
https://www.st.com/en/ecosystems/x-nucleo-ihm03a1.html
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First: That boards purported intelligence will sure as tunket get
between lcnc and its synchronized multi motor control, which will likely
cause problems for linuxcnc.
Second: the site does not have sufficient actual data to confirm or deny
that. Claims are propaganda, we need facts and those are well hidden.
Photos are just enough out of focus to hide stuff.
What I have found that works very nicely, is the recent crop of closed
loop stuff. It does away with PID's in lcnc because its in the driver.
They are setup in hal to do exactly as the TP outputs, and if the motor
can't do it, it can shut lcnc down in the next millisecond. The pid is
internal to the driver and its motor power is controlled by the
magnitude of the error on a step by step basis, 95% of the time the
motor is running quite freely on most machines so the error and applied
motor current are low, the motor runs with very little heating, and that
is a power saving you can see in the speed the utility meter is spinning
and you pay for.
My sheldon lathe is running them for almost 2 years, half the 4 motors
on my 6040 mill (Z,B) have been converted a year ago, the A axis on my
go704 is, and the three main axis conversions to them is on order. The 4
older conversions that can stop lcnc instantly have been well tested, it
works as intended, but in over a year, they have yet to do so during a
job, they simply do what the TP tells them to do.
The drivers cost a little more but I suspect since there is no current
settings, if an impending step skip is about to occur, it simply bangs
the motor with the whole power supply so it makes the move while
avoiding the impending skip.
Another advantage is that the drivers from Hanpose for both nema 17 and
nema 23's & 34's, are rated for up to 90 volts, doubling the speed you
can get from that same motor on other brands of drivers rated at 50
volts and running on 45. All of which means faster, more accurate
machining that uses less power to get the job done.
What's not to like?
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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