Chinese CNC 3020 / 6040 - USB variant

MrJTJinx wrote: I would wager that every single user who has asked the same question as walked away disapointed as well.

They got what they paid for!

Welcome to open source. If you want to demand that your problem solved by someone else, then pay someone to do it. If you want it for free, step up, put in some effort, work with the other volunteers, including the mental flexiblity to consider that the solution which you assume is the best, may have been considered and rejected for valid reasons.

Are you just trolling us? This is a most helpful forum full of extremely generous persons, many of which have deep knowledge and expertise in this topic. To come blasting in with this sort of argumentitive tone is not exactly edifying.

The outcome is i will have to buy a mesa interface card from the states pay twice as much due to ridicules postage charges then pay almost as much on import tax due to the fact the interface is only sold by the US manufacturer.

If you cant put in the effort to scroll down to the bottom of any page of the MESA website to where they put the " DEALERS" link, maybe LinuxCNC is not for you.
Mark

MrJTJinx wrote: I would wager that every single user who has asked the same question as walked away disapointed as well.

OK, so just supposing the devs were willing to entertain the idea of a USB driver, what hardware are you proposing they write one for?

Again, there is an option for Linuxcnc to send data to an arduino via USB, i am sure the User DaBit made it work, and i am sure there is another thread in German about the same thing Linuxcnc to arduino via USB and Lan.
Back on the issue of using Linuxcnc to send data to GRBL, the closest i can think of is like using a thermonuclear bomb to spat flies..... that are located at a different continent !
Linuxcnc can control almost anything, from a pen ploter made with CD rom drives to 25 Ton industrial machines.
GRBL is made to work with very limited resources provided by Arduino, hence it is very limited at what it can do.

MrJTJinx wrote: just out of curiosity what signal is sent to mesa cards over lan, possibly a serial string.

If you really want to know, the Mesa card manuals tell you:
www.mesanet.com/pdf/parallel/7i92man.pdf
Look at the "LBP16" protocol specification.

In effect the control is much like modbus, but binary. Addresses on the FPGA are set to values to achieve results, and results are read back from register addresses.

It looks nothing like G-code. It is at a much lower level, and is updated every 1mS, on the millisecond tick.

rodw wrote: Of course they are but I said a milling machine controlling a lathe so imagine these two big machines with one trying to control the other.

How about a G-code controlled robot arm typing G-code in to the MDI window? That would at least work

curtisa wrote: OK, so just supposing the devs were willing to entertain the idea of a USB driver, what hardware are you proposing they write one for?

There is one candidate: store.mesanet.com/index.php?route=produc...ct_id=70&search=7i43