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Hello atrex77,
this is a very nice project. I found this video , it looks fantastic.
A very fast LinuxCNC-Board for low cost.

You made a very good job, but is it useful in practice?
I think there are not enough input and output free.
In my opinion you need for a machine:
- for each axis 2 inputs (one side switch for reference and limit together, other side only limit)
- one input and one output for e-stop
- one output for enable the spindle additional to the PWM
- one output for the coolant
- if you have a machine enclosure, you need one input for the switch and one for enable the drives.

What do you think about this? Do you use it in an other way?
Do you already have a solution in your mind?

One thing about optical encoders, they really don't appreciate contamination. If oil or coolant get into them, it will generally really screw them up. Even if none of the electronics with are hurt, a little dirt in the wrong spot or on the wheel can be very bad. Also when they get really old sometimes the LED source can get weak or fail.

Latency is not really an issue with Modbus as it's not real time to begin with...

andypugh wrote:

M62 and friends need connections in HAL to have any effect. Do these connections exist? (motion.digital-out-NN etc)
 

Im not sure they do right now

This seems to be ocuring for other people too like this thread.
www.forum.linuxcnc.org/plasmac/42445-hel...s-qtplasmac?start=10
The feed reduction commands in gcode were not working for them but it never got solved. Other than using the post to generate the small hole fix.

So it was a busy week, but here is the list of keys that I modified to get the spindle running.  Some of the values are specific to the spindle itself.  My spindle is 2.2kw air cooled, so my max rpm is 24000 and the minimum rpm is 12000.  also my pwm range is from about 5v to around 9.6, so i adjusted the values is the 5 section to make my max voltage equal 24000 rpm. the values in the parenthesis are the values that i used, but will vary depending on your spindle

P00.01 - 1
P00.03 - [MAX OUTPUT FREQUENCY] (400)
P00.04 - [MAX RUNNING FREQUENCY] (400)
P00.05 - [MIN RUNNING FREQUENCY] (200)
P00.06 - 2 [ANALOG INPUT 2]
P00.07 - 1
P00.10 - 60 
P00.11 - 6 (seconds to accelerate)
P00.12 - 6 (seconds to decelerate)
P00.14 - 4.0 (2.2 KW)

P02.01 - [MOTOR RATED POWER] (2.2)
P02.02 - [MOTOR FREQUENCY] (400)
P02.03  - [MAX RPM] (24000)
P02.04 - [MOTOR VOLTAGE] (220)
P03.05 - [MOTOR RATED AMPS] (6)

with this section, anything under 5v will also give me 50% power, so the spindle can never run less than 12k rpm.  just to be on the safe side, i also set the AI2 settings to the same values (37-40)
P05.32 - 5.00
P05.33 - 50.00
P05.34 - 9.6
P05.35 - 100.0
P05.37 - 5.00
P05.38 - 50.00
P05.39 - 9.6
P05.40 - 100.0

This allows me to use the stop key to override the spindle in case of emergency
P07.04 - 3 
 

Thanks for the help. It wasnt in the accessories submenu. So I did a full reinstall and now it works perfectly fine. Just gotta learn how to set it all up. Thanks a lot for the help

What do you mean by: "had no 10V output for spindle supply from the beginning"

Isn't the VFD itself the spindle supply?

Apologies for not responding sooner. Yes, I would like to be able to set my tool length offsets by lowering Z until the dial on the analog gauge reads 0 and register that position in the tool offsets. Like in Axis this would be the point where one would, as I understand it, press Touch Z in the gui, but there is no Touch Z button in QtDragon. Now I would of suspected that there might be some alternatively named button or a line of some mystical gcode that could be entered that would write the offset into the tool table, but after looking for days, I have found nothing that would explain how this could be done.

I know all my problems would be solved by just getting an electronic tool setter, but at the same time I am baffled by there being no example, or set of instructions that I could find, as to how to do the tool length offsets by hand and analog gauges. It's all push the button stuff and nothing I could find that helps someone understand what to do if there is no button to push.

Is there a specific reason why QtDragon does not have any plugin, addon, macro, or screen that would facilitate manual tool setting?

Please post specific model and link to datasheet.

I thought USB was generally considered bad (for latency, speed, performance, etc.)

Ok I got the key to work and 2.10 instaled by doing this in the terminal:

sudo wget -0 /etc/apt/trusted.gpg.d/buildbot-archive-key.gpg *http://buildbot2.highlab.com/*  (without the *)

sudo apt update

sudo apt upgrade

I did this after adding the new repository in the sympathetic package manger.

Unfourtanetly this did not fix my issues. When I dry run the gcode previously posted my feed still does not slow down to 20%, it stays at the base feed rate. So Im guessing I have to link something in hal now? any help on this would be great as I havent worked with hal before.

Also, now on 2.10 when I try to edit gcode with the edit button in qtplasmac it does not load the gcode back into qtplasmac after "saving" and doesnt save the gcode at all. So, I have to edit it in a notepad instead. Im guessing this is just a glitch with 2.10 and will be fixed.

I once tried to communicate with an Arduino over USB.

Anything below 9600 baud was 100% broken.

Not sure why.

9600 baud is the lowest you should use IMO.

The 5.2V is not really an issue as you can scale (and bound) the analog output
so you get 0 to 5V at 0 to full RPM.

 

My e-stop switch has 2 actual switches:
One sends E-stop signal to LinuxCNC, the other one mechanically prevents any signal power from reaching the SSR that controls the router.

mesambccc compiles the modbus device(s) specific xml source file
to data files that hm2_modbus uses.

Typical mesambcc usage would be something like:

mesambccc  -o ~/linuxcnc/configs/mb25ioc32.mbccb mb25ioc32.mbccs

Where mb25ioc32.mbccs is the xml source file and mb25ioc32.mbccb is the resulting
data file that the driver uses. 

Hal file setup is described in the hm2_modbus manual page:

man hm2_modbus

A minimal 25IOC32 xml source file looks like this:

<mesamodbus baudrate="9600" parity="N" interval="1000" >
 <devices>
  <device name="mb25ioc32" address="0x01"/>
 </devices>
 <commands>
  <command device="mb25ioc32" address="0x0000" function="R_INPUTS" name="input" count="32" />
  <command device="mb25ioc32" address="0x0000" function="W_COILS" name="output" count="32" resend="true" />
 </commands>
</mesamodbus>