AX58100

Thanks for the information.
How do you set the lcec.0.D1.stepspermm1 command to control the stepper motor driver, for example, if it is set to 1600?
What relationship should it have with respect to the screw pitch if it has a pitch of 5 mm per turn?

Just to divide 1600 by 5 = 320 steps/mm.

Do you have the steppers running? I am curious if that voltage level shifter works. I mean, it should work but I never came that far in my build.

I have not been able to test it yet, but with a multimeter I have verified that when I change the direction of a motor the DIR pin changes from 0 to 5 volts.

Then it seems to work. Good luck with the steppers.

I still don't understand, what do I use the lcec.0.D1.stepspermm pins for?

The thing that updates every millisecond is CommandedPosition, linuxcnc calculates a new position value every millisecond which goes to the MCU on the card. How many steps does the step generator need to make to go to that new position?
There is the scaling parameter 320 steps/mm. Say it needs to go 0.1 mm in one millisecond which is awfully fast but just an example. 0.1 *320 = 32 steps to make during that millisecond.
Another way could be to calculate number of steps to move in hal, in linuxcnc. It is not done that way. The new position, commanded positition, in machine units, is fed to the stepper driver, be it Ethercat, parallel port or Mesa card.
If you change the microstep setting on the driver itself you need to change stepspermm accordingly.

 

As a comment, and room for improvements, if one so wishes.

The stepspermm variable is set up as a pdos. Meaning that this value
will be updated every servo cycle (miilisecond). That is not very optimal,
the steps per mm scaling factor is a constant. Set it once and it stays there.
It is not like one will change the scaling value during operation.

The options I saw when I put it as a pdos was to either make it a sdos or a constant in the MCU program.
As a constant in the MCU program it becomes kind of inaccessible, but apart from that it will work fine.
Making it a sdos adds a bit of complexity when giving it a value. There is no interface for sdos to hal
that I know about. One can give a value to a sdos in the ethercat-conf.xml config file, but that brings
its own unnecessary complexity. One need to enter a line like the last line below

To end up with "40 06" one brings up a decimal to hex converter and converts 1600 which gives 640.
Shift place on the two bytes 06 40 => 40 06 which one then enters in ethercat-conf.xml.
The code in the MCU stays the same, still Obj.StepsPerMM1 (or what is is called). It is just not updated
every serocycle but once in the beginning.

Just a bit of background and rambling.

I'm still lost. I'm used to using STEP SCALE in the ini to adjust the number of steps needed to move one mm. but now I don't know how to do it. For example if I need 320 steps/mm, how do I adjust the value lcec.0.D1.stepspermm?

Ok I see, the hal syntax is or for example
and that goes into the main hal file.

Are these values ​​in the xml file okay?
<master idx="0" appTimePeriod="1000000" refClockSyncCycles="-1"> <!-- was "5" -->
<dcConf assignActivate="300" sync0Cycle="*1" sync0Shift="1000000"/> <!-- was "0" -->