Advanced Search

You need to connect the relevant signals in your .hal file as in the example linked in the post above.

And where is the PLC of the machine written?

Not sure which PLC or which machine you are referring to.

Are these positional updates coming in during execution of a gcode program or while an individual MDI command is being executed?

There has been a short discussion about a similar project recently:
forum.linuxcnc.org/38-general-linuxcnc-q...robot-control#319033

you can take a look at this (non-realtime) component,
there i use sliders in python(qt5) to move my robot-joints.

it can also change the target position while moving, like you need.

github.com/multigcs/riocore/blob/main/ri...s/robojog/robojog.py

the script is not big and you already have an insight or you can use it as a basis, throw out qt and simply replace the inputs with ZeroMQ

unknown wrote:

I guess you didn't use the sysfs patch, this is required for Linuxcnc to recogonise that the environment is a real time one.

Easiest option will be to download the latest RPi4 image on the downloads page, has a 6.12.11 kernel (with the required sys_fs patch), Linuxcnc version 2.9.4. Might pay to backup your home directory.

As usual
user: cnc
pwd: cnc

linuxcnc.org/iso/rpi-4-debian-bookworm-6...25-01-27-0404.img.xz
linuxcnc.org/iso/rpi-4-debian-bookworm-6...7-0404.img.xz.sha256
 

Hi unknown,

Thank you for your suggestion. I have burnt that image, and I am able to ping my 7i96s on 10.10.10.10.

1. I am not able to go very far with PNCConf -- I have locale problem, using menu-config, I have set my default locale to en AU.UTF_8, still no go. There are existing posts on this problem, I will try it again.

2. This image does not come with WIFI preconfigured. I am using the Pi Imager to burnt it, and WIFI setting did not take effect.

Thank you and best regards,

....behai.





 

langdons wrote:

Should I connect one transformer lead to ground (the plug is 3-prong, the chassis is grounded steel)?

NO!
Connect ground only to box/chasis and to shielded cables.
Amps should be enough, move on.
Transformers can handle a lot of abuse, small overloads are no problem at all. After you power everything and have it running for 10-15 minutes, do check if it is heating from time to time, and even if it gets hot after and hour or two of work, as long as you can keep your palm on it, it is OK.
Human hand will have issues above 50 degree C, at 80 it burns like hell, and you will always know if the temp has gotten over 100 as your skin will remain attached to whatever you are touching, and fingers will turn shiny!

I'll have to leave this to Rod & others. It's not something I could really test other than the installation bit.

Also, it's not really 40V, its more like 38.5VDC.

Diodes have voltage drop.

A full-wave rectifier drops like 1.4V

Nice! If you need someone to play with it I'm here

Thanks for your reply I will look it over as soon as I have time. (: (:

Should I connect one transformer lead to ground (the plug is 3-prong, the chassis is grounded steel)?

regarding EtherCAT driver for rpi5 ethernet:

gitlab.com/etherlab.org/ethercat/-/issues/104

RPi 5 uses the

macb

driver (Cadence GEM) and not

genet

. So I guess you have to use a Raspberry Pi 4 if you want a native driver.

6 680uF 63V capacitors

So 4080uF + the internal input filter capacitor of the DM556.

How much average amperage will 2 DM860@57VAC and a DM556@40VDC draw?

I don't want to fry my transformer!

Ok.

My new rectifier will be finieshed tomorrow (some random capacitors from my school that everyone else forgot about and a rectifier bridge+heatsink desoldered from an iMac PSU on a proto board from Thailand).

The old rectifier used a 40V capacitor for 38VDC!
Only 2 volts away from damage!

My new rectifier uses 63V caps just in case.

I'll have to add the 7i78 spindle.

JT

The spindle basically works now. But... when Linux CNC is not running, the spindle ramps often up to full speed. (I hooked the Enable pin of the drive to a +5V pin of the TB3, so obviously the PWM pin must put out full voltage when the software is not running yet)
What should be the output of the pwmgen, when no linux CNC is running?

I think I could circumvent this by connecting one output of TB6 to the Input of the Spindle drive.
Problem: Output is set up for 24 V and I have no idea if that will damage the Spindle drive.

Is it a usual approach to just put resistors into the wiring?
 
Should it be even O.K. to just install one Resistor (R1) in the output line and cancel R2 altogether?