Advanced Search

I know there are a number of folks with H2's (and H3/H4's) that work with LCNC, but mine has been a nightmare.

So far, the only distro that seems to work seamlessly is Deb 13.  Every other combo I've tried (over the past two years) has problems of some kind.

MX21/MX23, Mint, Deb 11/12, LCNC Isos, net and full installs of same, everything winds up with some problem.

Ethernet NIC not recognized at all, unable to install R8125 drivers properly, wifi dongles not recognized.  Tried plenty of RT kernels, followed Rod's installation guide, etc.  

I've lost count how many times I've installed some variation of linux and gone through the headache of configuring all the insane/dumb settings just to have a working system... only to hit a roadblock 95% through the process.  Spend a couple hours each time only to get a horrible ping time or some other crippling error.

Unfortunately, Deb 13 has recently started shipping with python3.12... and I'm trying to use Probe Basic.  Which now fails due to 'imp' module being discontinued in python3.12.  forum.linuxcnc.org/qtpyvcp/53790-probe-b...-installation#309684

And I've no clue if I can switch python3.11 for 3.12 - or if that's even possible.

I was about to run out and buy a RPi5 tonight, and then I - thankfully - found out the VTK backplot isn't compatible with RPi.

I've got a working HP 800 G2, but it's too big to fit in my enclosure without a month of modifications.  And I'm not just going to buy an H3 in the hopes it works 'cause it's one higher.

Before I take a chainsaw to my control panel, if there's anyone running an H2+ can you please post up:

• Distro and version, and where you pulled it
• LCNC version and where/how you installed it
• Any other system mods/updates you did (nic driver), and how to accomplish same in detail

As an alternative, if you have a recommendation for a PC with the same or smaller footprint (110mm) that you know works without issue, please let me know.

At this point, money is not an issue... time and frustration-avoidance are the priority.

Thanks in advance.

Spindle encoder is single ended encoder. Have changed the jumper setting accordingly. Max spindle RPM after pulley reduction is 238 rpms. 
No I don't get precise revs.
The index leds are working correctly if I rotate it by hand.  The leds of phase A B and index are blinking according. However, the threads are all incorrect. The wiring I have checked again and seems to be fine.

"Ethercat should be running. If the above command is not found, you have a problem
You can list the slaves if you type
ethercat slaves"
So far I found the servo everything fine... but then it didn't go, from my understanding there is no lcec_conf file...

raspberrypi4b 8 giga, servo ethercat I will add a xml of the drive too 

thank you for sharing your code, but my configuration is a little bit different.
Indeed, you have a lubrication every 30 seconds so you can control not to keep in memory the timer when the condition spindle and motion are not met.

on the other hand, in my configuration I have lubrication every 10-15 min. so if I have a programme that lasts 8 min I will never see the oil pressure information. I will have to wait for a programme that lasts more than 10-15 min to find out if I have an motor fault or a big leak.

Unfortunately I don't know the python language or c (I can read it if there are a lot of comments) only the ladder but it's the last thing to set on my lathe and I haven't used classic ladder so I wouldn't want to use it just for that.

how can i implement your code with a timer in memory?

You can run the stepgen in position mode and not use the PID loop at all,
but its been found that using the PID loop deals better with random latency
spikes.

When using the PID loop, the stepgen is in velocity mode so unless you close the loop
with some P term, the actual stepgen position will drift from the commanded position
due to the small (say 50 PPM) differences in LinuxCNCs clock and the hardware's 
crystal oscillator.

Velocity mode without feedback is a bit like telling someone how to get somewhere
by telling them the speed and direction to go at any given time. Unless the speeds
are perfect you wont end up exactly where you should be.
 

Wait, what exactly are you using?

Welcome and feel free to ask/teach/entertain us.

I have 4 siemens 1200 safety cpu unit with digital input and output .... completely non used because too big for our electric cabinet ... if someone need 1 or all 4 .... cheaper price ... my wharehouse is too little for all ....

Hello all, 
In this thread i intend to to document my attempt to to build a controller for a 4 axis mill, from concept to implementation. 

I am highly inexperienced with Linux and programming in general,  so this may be new source of entertainment for the more experienced members. The hope is to leave a trail someone as daft as me could follow, to create a workable controller.

The Photo's of screens and other dubious content is aimed at providing a quick and dirty temporary reference for those of us who don't know what the result is supposed to look like, if this ends up being of use i will tidy it up.  


The end goal  is a 4 axis ethercat motion control system with RPI gpio performing a few less timing sensitive functions such as spindle direction and gear selection.  with closed loop position control.



 

I will change it tmr,
I always thought the drive takes in the step gen and handle the rest. So in case of a open loop system, does P term still need to be 1/servo period?

it is somewhat complicated. The stepgens do not get their position commands directly from the g-code. There are a few layers in between.

One of the motion planners (there is more than one) sends the commands for movement to the kinematics model, that then sends the joint position commands either directly to or via a PID loop to the stepgen. (I understand that the motion planner used for jogging isn't the same as the one used for program execution.)

The motion planner reads the G-code, calculates what the current commanded position should be and adds required offsets, before sending the axis positio commands to the Kinematics program.

After the Kinematics program translates the axis positions to joint positions, then any additional joint offsets will be added (such as home offsets.

Thanks. I will try using another cable. Is there any other way to connect the Mesa 7C81 with the Raspberry Pi 4? I have heard that you can connect the Mesa 7C81 using PNCoff, but I don’t understand how. If possible, could you explain it to me?

Not sure, could possible be a bad cable.
 

i had also tried the --readhmid command but It gives me the same error . There is an orange indication light on the mesa board after I power it up using the IDC26 cable which is not longer than 2.5 inches as mentioned in the manual. Note : No red leds after powering on the mesa board.

viski post=288949 userid=14009How to program scara to draw a circle ?

Assuming you have set up your SCARA arm appropriately using the correct kinematics, you would program it to do a circle exactly the same way as you would program a circle for an ordinary XYZ Cartesian machine that used Trivkins.   The kinematics program will automatically convert the rotary angular movement of the joints into linear XYZ Cartesian coordinates and vice versa.

The tricky part ia collecting all of the precise measurements and calibration settings that you will need to make the kinematics model work correctly.for your machine.