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First thing you need to realise is that Linuxcnc & GRBL are two very different implentations of cnc control.

Your grbl g-code sender just sends gcode to the grbl board and that interprets the gcode. There is no realtime communication between the 2.

Linuxcnc on the other hand does everything and works in realtime. So any inputs from a user or the machine are acted upon as they are seen. In a nut shell Linuxcnc does not send any gcode, it creates all the timing required to drive steppers, servos or whatever. Even when using the Mesa cards all the cards receive more or less are timing instructions.

Honestly I wouldn't waste any time converting your machine to Linuxcnc. Get used to using it and getting your head around the FreeCad Path workbench.

Whilst it is possible to convert, that money would be better spent on replacing broken endmills and the like.

I'm using the 20.2 version of Freecad and apart from the obvious issue, the topological naming issue, I can't say that there is any bugs that would cause me to revert. I've used it to design & machine the bits & bobs I've required to convert my Myford FrankenLathe to cnc.

Hello,

I've recently purchased a desktop little CNCTOPBAOS 1610 Pro Desktop CNC router . This thing is smaller than I had expected. But it was cheap enough to get my feet wet. So I went ahead and installed LinuxCNC on a Raspi and have it connected to the device. I found another post stating that this device has a GRBL driver already. So at this point, could I then just use my OctoPi raspi than runs my Ender3 to send gcode to the 1610? Should I bother going down the road of converting my CNC router to use LinuxCNC?

My main software that I intend on using for this is FreeCAD. I have done several drawings and models using FreeCAD, so I'm at least familiar with the software (Although, because of some bug with the newer versions, I'm stuck with v0.19). I guess the first thing to do is to setup a couple little tests just see the thing running. I figured some silly text on a wood block outta kick it off. Is it possible to send gcode to LinuxCNC and it just upload it to the device? Can I use LinuxCNC to calibrate the device?

Any other tips and tricks for a newbie? I talked to a friend that does this professionally over seas and he pointed out that I need some different end mills. So I snagged these , but it looks like I still need to add them to the path workbench for FreeCAD.

Thinking about it, starting with 3d printing, I was kind of spoiled because everything is basically ready. Just level the bed and you're off to the races. Ah well... To make nicer things, ya gotta get a little headier, I suppose.

Hi everyone. I tried downloading Robbbbbb's config but I didn't have any luck. I have tried following the 2 pinned guides as well as all the steps posted in this thread, but I can't seem to get anywhere. I just have a single lichuan servo and the EK1100.

One thing I noticed is thatchanges the state of my Beckoff EK1100 instead of the servo drive. By changing p0 to p1, I can change the state of the servo drive to init (1ry) and preop(2ry) but nothing else. I tried changing some zeros to ones in Rob's config but it didn't work. 

I have also heard people staying they did stuff using twin cat, but I downloaded it and did some quick googling but I didn't get anywhere. 

Is there something else it could be? Could I have missed a step 

Thank you in advance

I can't seem to find a clear answer on the difference between the AC servo motors we use to power our machine axis ["AC servos"], and the 3 phase AC motors we often see on spindles run with a VFD. Can someone help me understand? 

I'm trying to figure out if I can power a Fanuc 22P AC Spindle Motor [3 phase, 4 poles] with a suitably sized Allen & Bradley Ultra 3000 [Model #: 2098-DSD-075-SE]. Is it possible? 

The application is a Hardinge Conquest retrofit, live tooling. I need to get decent positioning out of the spindle rotational axis to then lock (external lock, disk brake type) for cross drilling etc. Ideally I want to move towards full C axis but I think it wont be possible with this motor - correct me if I'm wrong. 

Thanks! 

Nice work/contrib. Useful.

If you decide to take it a level up one of those day, shout out and I'll put up the metric Tol & Grades EQs pub domain for internal and external threads. Not utterly complex to do imperial too, if required.

e.g.:

blazini36 wrote:

Any chance you can share the whole configuration you have shown in your post a couple pages back? That looks pretty good. I've been pecking at a Flex UI for a bit but haven't gotten very far yet.

I don't think I have it anymore. It was based on Persei8's QtDragon version but when the plotter stuff is all working I'll modify the standard QtDragon UI instead.

I think you should be using the current version of the source to start with
github.com/linuxcnc-ethercat/linuxcnc-ethercat

tommylight wrote:

sudo apt update
sudo apt upgrade
sudo apt install linuxcnc-uspace

Only do this if you want a very old prerelease version. Best way is to follow these instructions which will give you the lates 2.9.3 release
linuxcnc.org/docs/stable/html/getting-st...th_preempt_rt_kernel

Finally got a chance to revise the code. This version adds tool number, spindle speed, and coolant to the previous version with Acme threading..

Enjoy.

I found a fix!
I'm running Debian Linux. Go to Settings - Display
Under Scale, pick Custom, and set X & Y to 1.1 See attached photo.
After that, the display fit on the screen!

Mesa should have 7I84s in less than a week, and our
distributors maybe a week later.

Found this vid:

In the comments the author discusses replacing the XZ motors, but keeping the main DC spindle motor.

Might get some ideas - other than using Mach, of course

Regarding the extra expense of the available Mesa cards... I don't know your situation, but that amount of money seems pretty trivial to spend on what should turn out to be an amazing lathe.  I know you'll spend more than that on just a few tools.

As for the 7i74 vs 7i84D... Small DIN-rail solid state relays are getting quite cheap (no flyback diodes required) to flop your output signals.

Yes I'm pretty sure they are analog input driven.

I'm planning on using the 7i97T with another card for more I/O. Was planning on using a 7i84, but I can't find them anywhere in stock. I need 20 sourcing outputs and 25 sinking inputs in total.

I could use some relais to convert the sinking outputs of the 7i84D to sourcing ones, but that seems unnecesary complicated. Other option would be the 7IA0 or the 7i77 but they are both 150€ more expensive.

For the controller I'll probably use a Raspberry PI 5.

I'm not personally aquainted with those drives, but a quick internet search makes me think they're analog-input DC servos.

Hopefully someone with more experience will jump in, but you could probably take your pick of with re-using the drives with an analog Mesa, or switching to modern AC servos (with analog, S&D, or field-bus/Ethercat).

Nice lathe, by the way.  You'll be giving RotarySMP's Schaublin 125 a run for the money.

No, even at high baud rates, serial is just not fast enough.