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I wanted to create a control voltage for my spindle using a Raspberry Pi 5 connected to a Byte2Bot parallel daughter board (Misnomer Alert – it is actually a DB25 daughterboard and has little to do with a parallel port) connected to a parallel port breakout board provided by Byte2Bot.  The parallel port breakout board has a terminal for PWM that will produce a voltage. The question is how to do it. Here is what I discovered:

This issue continues in the attachments:
LinuxCNCQuestionA
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Yes, the sserial pinouts on the 7I85 and 7I96S are similar except the 7I85 uses 8 pins and the 7I96S uses 6
You can plug a 6 pin sserial connector into the 7I85 if you center it, that is with  a 1 pin gap in each side.
The 8 pin connection uses duplicated power and ground pins. On the 6 pin connector, you must terminate
2 wires in the single power and ground pins.
 

I would use all 5V signals for the step motor drive interface 
and possibly 24V for limit switches .
 

thank you for reply

error says:
**** GLADE VCP ERROR: with xml file: motion_control_gtk3_.ui : gi.repository.Gtk' object has no attribute 'glade'

Hi,
Please let me know if spindle is stillavailable?

Criistian

30 reasons to use FreeCAD in 2026

That report lists 4 PPMC boards at "slots" 0, 1, 2 and 3. That is pretty odd. Are you sure this machine has a PWM controller? Are you sure the parallel port is set up correctly? Did the CMOS battery go dead? If so, the BIOS settings for the parallel port would have gotten lost. Make sure the BIOS peripheral settings for the parallel port are set to EPP mode.
Those are the first things that come to mind.
Report back if these hints don't fix it.
Jon

I will not use DC yet as it sounds too complicated at this stage
I setup a Linuxcnc on my personal server. Everything is recognized but the counter is not working.
Its in PRE OP, maybe this is the issue
 

Hi,
this looks really cool, thanks for sharing! I’ll definitely be testing it once my lathe is ready.

I really like the idea of solid onboard solutions. If this works well, you could do around 90% of lathe parts without external CAM, which would be a real improvement.

It reminds me a bit of Native CAM. Do you know it?
If so, I’d be interested in what made you decide to develop a completely new macro. From my point of view, Native CAM on the turning side is mainly missing proper G71 support and a polyline tool (which already exists in Native CAM Mill).

This is not meant as criticism, I generally find new developments very exciting. I’m not a programmer myself and can’t really judge the effort involved, which is why I’m asking.

Either way, very promising project. Looking forward to seeing how it develops

greetings 
Tom

Sorry to bring the topic up, im trying to figure out what is wrong with my Probing in PROBE BASIC.

The Carousel, tool changing, homing, spindle S line, everything is good. Im running Ethercat XYY and Mesa Z and Carousel simultaneously. All good.
The problem is in the Tool Touch Off Macro, and defining my part coordinates.


- When i touch off my tools, the tool lenght which gets written on the table is very weird - not consistent with the tools im measuring.

- My probe is not on the part itself, but on a specific place on the table. So, after 'zeroing' the tools, i should also zero the part.

As the tool touch off macro is giving inconsistent values, currently I am placing the tool at almost touching the part, and hitting "Zero Z", and changing every tool with MDI codes M6 T(Tn) G43 H(Tn). Placing the tool at the top of the stock surface and hitting "zero Z" is the correct procedure , if im measuring the tools correctly?

Any ideas as to why are tool lengths being inconsistent?

My Spindle nose doesn't reach the probe - due to machine mechanical limitations. I can only touch it if i have a cone + tool. is this OK?

I think you know this already, but you have the output of "sudo dmesg" with the last lines being relevant.

In this case, do the following commands work "ethercat -p 0 upload 0x2701 2" and "ethercat -p 0 download 0x2701 2 1"?
You are aware that bytes in sdoDataRaw are LSBF so your number "00 00 00 40" is 67108864?
 

I'm trying to use Yaskawa sigma servo(EtherCAT) for LinuxCNC.

But my trial does not work.
I get Alarm A12 (EtherCAT Output Syncronization Error)

Does anyone know good example master settings ?

my trial 

ini
loadusr -W lcec_conf ethercat-conf.xml

ethercat-conf.xml

<masters>
  <master idx="0" appTimePeriod="1000000" refClockSyncCycles="1">

    <slave idx="0" type="generic" vid="00000539" pid="02200901" configPdos="true">
      <dcConf assignActivate="300" sync0Cycle="*1" sync0Shift="0"/>     

      <sdoConfig idx="2701" subIdx="02" ><sdoDataRaw data="00 00 00 04" /></sdoConfig>　


<< ERROR.
LCEC: slave 0.0: Failed to execute SDO download( 0x2701:0x02, size4, bite0=0, error -5, abort_code 00000000)

...


 

Please start linuxcnc from the command line and check the output there. 
You will see there the error that does stop your panel to be embedded.

Norbert

PCW wrote:

7I96S    CL57
+5V     PUL+
STEP-   PUL-
+5V     DIR+
DIR-     DIR-

SW3 Set for 5V mode

The ENA, ALM and BRK can be left unconnected

I have a similar setup I'm building. If I wanted to use the ENA and ALM as well as STEP/DIR, which position should the S3 switch be in 5V or 24V? I know the 7i96S provides 5V power for STEP/DIR but my field power is 24V. Can I do this or would I need to provide a separate 5V power source for my ENA/ALM signals?

Is the "unplug and plug" thing correct, meaning is it the same pinout for SSerial on 7i96S and 7i85?
Sorry if i messed that up, i never used a 7i85, yet, it was just an educated guess from experience with Mesa boards and very consistent pinout.