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  • PCW
  • PCW's Avatar
17 Aug 2025 15:15

Request for firmware bitfile for Mesa 7i90HD + 7i85S (3 axes, encoders, PWM)

Category: Driver Boards

Note that the pins listed in the source file comments are DB25 pins

so

7I90  P4.1  --> DB25.1
7I90  P4.3  --> DB25.14
7I90  P4.5  --> DB25.2

etc
  • alpri0265
  • alpri0265
17 Aug 2025 15:02
  • Surmetall
  • Surmetall's Avatar
17 Aug 2025 14:47 - 17 Aug 2025 14:50
Replied by Surmetall on topic NativeCam on LinuxCNC 2.9.3

NativeCam on LinuxCNC 2.9.3

Category: NativeCAM

Hi thanks for your answer. Yes i saw your Macros and i think they look really good. You did and do a great jobs there for all, thank you for that! But as far as i understand them, you can only use one at a time right? and there is also no macro for a free contur ? or do i miss something? 

edit: oh sorry my bad, they are from andypugh of course! so thanks andy :)
  • PCW
  • PCW's Avatar
17 Aug 2025 14:31 - 17 Aug 2025 14:32

Request for firmware bitfile for Mesa 7i90HD + 7i85S (3 axes, encoders, PWM)

Category: Driver Boards

Note that this is not a standard configuration as the 7I90 is a 50 pin connector FPGA card
and the 7I85S is s 25 pin FPGA card daughtercard. I pinned this out so a flat cable adapter
should be relatively simple (look at the included VHD source file for the pinout)

 

File Attachment:

File Name: 7i90_7I85S31p_p4.zip
File Size:9 KB


This has 3 stepgens and 1 PWMgen, 4 encoders and a sserial port
(on the 7I85S) 
 
  • PCW
  • PCW's Avatar
17 Aug 2025 14:07

MESA 7i97 - connection of DC Tach-Motors (2)

Category: General LinuxCNC Questions

Very briefly:

In the hal file (use the sample: basic7i97 or use MesaCT to generate the basic configurations)
The PID output pin connects to the PWM value pin. You would change this connection to 
add the abs component so you have:

PID output --> abs in --> abs out --> PWM value

That is, for example, in the basic7i97 hal file you have:

net x-output     => [HMOT](CARD0).pwmgen.00.value

This would need to change to:

net x-output     => abs.0.in
net abs-x-output    <= abs.0.out
net abs-x-output     => [HMOT](CARD0).pwmgen.00.value

 
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