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Try an add on network card, or a USB to LAN adapter.

why something new again ?

there are now enough projects, why not bundle the work?


- encoder scaling: where is it applied with a Mesa board? In the FPGA (did not find anything in the VHDL) or the hostmot2 driver or in LinuxCNC main software?

RIO calculate the offset and scaling inside the hal_component


- motor acceleration and max speed: the same question

and this inside LinuxCNC and the PID controller

Always use --show at the end of latency histogram, it will show the number of excursions that are not inside the visible area of the histogram, but they can be seen as multicolored columns on both sides of the histogram.
Also, use --nobase if there is no need for the base period, it adds more timing strains to CPU that will mess with the servo period latency results.
For both periodsFor servo period only

ajar171 wrote:

Now to my questions:
- encoder scaling: where is it applied with a Mesa board? In the FPGA (did not find anything in the VHDL) or the hostmot2 driver or in LinuxCNC main software?
- motor acceleration and max speed: the same question

 

In LinuxCNC, in the ini file.

Hi,

Before starting to change kernels etc. I thought maybe first do the latency-histogram test.
I did this on 2 different pc's.

From what i read here : max us > 100 = is bad.
Is this value both the same for base- & servo-thread?
Or maybe i am reading the histogram not correct.

 
 
 

Hi everyone!

Long time lurker here

Being fed up with the random avaiability of Mesa hardware in the EU, I decided to start designing an open source interface board. The schematics and PCB designs are almost finished, the firmware works so far, that I have communication between a development board and LinuxCNC and can control digital and analog inputs and outputs, read encoder inputs, etc.. So far so good...

Now to my questions:
- encoder scaling: where is it applied with a Mesa board? In the FPGA (did not find anything in the VHDL) or the hostmot2 driver or in LinuxCNC main software?
- motor acceleration and max speed: the same question

Thanks in advance!