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For configurations with specific daughtercards, the daughtercard 
name is included in the file name and you can use the .pin file
to determine the content and pinout of the firmware, for example
the 7i76eu_7i76x1_pktv2d.pin file shows that the configuration
includes a V2 PktUART ( the TX and RX halves )

7i76eu_7i76x1_pktv2d.bin 

Would be the correct firmware

You will also need to update LinuxCNC to the lastest version
sine the hm2_modbus driver is quite new.

 

thank you.
I know I need to update / flash my 7i76eu.
The "bundle" from your webpage contains 20+ different firmware files... I would assume that 7i76eud.bin/pin are the correct ones, right? (for a standalone 7i76eu without any extensions)

Hello y'all!
I just received my new mesa 7i76eu, and I have a huge CNC with a durapulse GS10 vfd (until now it was runnnig with grblhal).

Does "pktUart" allow me to connect my GS10 vfd directly to the mesa without a usb dongle?

Regards!

Saw this old iron while entertaining the machinery buying itch today on Kijiji -- www.kijiji.ca/v-other-business-industria...i-hit-18s/1716314528

That link will go dead with time, so for the record it looks like a Hyundai HIT 18S for $2k Canadian, not working. Seller says it has some repaired drives. I probably need to ask more questions, just not sure what all the right ones are.

Seller might be asking too much, but says he's open to offers. Any thoughts from more experienced heads here, whether or not something like this is worth a look and a retrofit? Or should I be running the other way fast as I can? I don't have any impressions, good or bad, about Hyundai quality, and I'm not sure what dead machines should generally go for.

On the scale of difficulty for retrofits, where does a machine like this fall? I'm no expert with HAL but have dabbled a little. Built my own plasma table with 7i76e and a couple THCAD's by riding on the shoulders of giants on this forum.

Thanks in advance for any time you spend looking at this.

Hi langdons! Thanks for your question!
Yes the VFD has more than one output. One +24V for maybe switches or relays, two relay outputs and one +10v output that puts voltage to the electronic potentiometer on the 7i76e. The mesa doesn't have such a voltage output on board, so you have to give that from an external source (eg the VFD 10V out) to the spindle+ input. The spindle-output then gives the 0-10V voltage correspondingly to the set rpms back to the VFD's analog input and, if the FWD signal is on, the spindle turns.
In my case, the rpm output voltage AND the spindle.enable = spindle.on signal is only given out from LCNC if I do this from a file. Normally - and any time before, this works even with any MDI speed command.

So - the VFD (now) works as it should but LCNC has problems to give the right MDI Commands as ordered to the outputs of the MESA card.
The VFD had no +10V on its H output as it came to me, from the dealer, new product, no NOS, freshly produced 3 years ago. I wasn't ready to build that thing in because I was busy with the mechanic part of my CNC. I put some parameters in the first weeks, but no real testing with any controller, so I didn't mention that problem. I found that few weeks ago, as I installed the VFD and tried to get the spindle turning. And found that there is no +10V at Out H. Then, the external 10V source, but I wanted the VFD beeing allright, so I sent it to Hitachi for Service.

I wasn't able to go down to my machine the last days, but I will make a video of that process the next days.

Kind regards!

Hi Todd,
I’ve checked everything—the only thing left is the motor encoder, and a lot of people, including an electrician, told me it’s likely the problem. I’ve tested all the cables (several times), the controller, and I’ve even done parameter resets. So, It must be the encoder , because i've powered the motor with a  power supply and it works.Just to clarify: I’m not doing the retrofit only for  the motor. It’s because I’ve been talking to a guy who used to work on the same machine, and he said there are serious issues with the Z axis ,it doesn’t save its position. Actually, before the machine broke, I had experienced this issue myself.Over the last few days, I did some research and found a good shop online Variumetrum and  i have done some research and seem's good so here my choices:

• 3 x Leadshine ELM1 750W with brake
• 3 x Leadshine AC Servodrive EL6 750W
• 1 x Mesa 7I76EU(not from the same shop)

On the old machine i've Sanyo Denki 500W  DC80 Model 850T-0123EL7 , brushed motor .
Let me know what you think!

Ps- I've only to think to the z axis and than i can buy all of them.

Ofcourse! 

I've included them as an attachment.

I hope you have some good insights into my setup. 

Thanks in advance.

EDIT:

I now also use the following step timing:

DIRSETUP   = 500
DIRHOLD    = 500
STEPLEN    = 1000
STEPSPACE  = 1000
STEP_SCALE = 1000

In addition, I changed the |DISPLAY|MAX_VELOCITY and the |TRAJ| VELOCITY settings. I have also increased the other velocity limits accordingly.The machine is now performing better than ever!
Surprisingly, I'm no longer getting any following errors—I'm not entirely sure why, but I’m definitely not complaining. ?Thanks to everyone for the input and suggestions!

Can you post your complete hal/ini files?

Hello Community,
many things are working nowadays with  Linuxcnc 2.9.2 with Probe Basic on a MESA 7i76e. But:

A few weeks ago I had to change my Hitachi VFD because it had no 10V output for spindle supply from the beginning. I sent it to service in April and I had to get the 10V from a separated power supply, this worked fine with a chinese VFD for the time the Hitachi VFD was in service.
Last week the Hitachi came back from service, the 10V Out was working, but surprisingly I cannot make MDI speed commands any more. I set S6000 or S12000, press Enter, in the spindle display on the right side 22000 occurs and I can press FWD Button but nothing happens.
IN the HALSHOW there is
0 at spindle-out
0 at spindle.0.speed.out
0 at spindle.0.on
0 at spindle.0.forward. Tested with S6000, S12000 S24000.

All this worked fine with the chinese VFD before.
So, I thought my 7i76e card is burnt up (I did not change any of my HAL or INI files since I sent my Hitachi away), but surprisingly further experiments could deny that.
Speed instructions from a file are working as they should. E.g. my warmup file - spindle turns in the right direction, right speed, right display down right.
Parameters are the same in the Hitachi as before.

Do you have any idea what could have happened here? I'm totally clueless...
Thanks for any hint and help!

Hanno
HAL and INI Files:
    

Presuming there is nothing wrong with the original servo systems, then usually the best option is to reuse them. You will need to figure out how the existing cnc controlled the servos. If they were using step/dir signals then the 7i76e should be a good option for the retrofit. If the servos were commanded using analog signals or some other way (such as some kind of serial bus), then some other hardware might be more appropriate.

npostma wrote:

... my power supply is a 32V 10A unit running three axes, so it might be a bit underpowered. Could this be the cause of the joint following errors?

It is not underpowered for stepper systems, might be for servo systems, so not the cause of following errors for steppers, but might be for servo systems.

I started getting joint following errors after I changed the following stepgen timing settings to these even values:DIRSETUP = 6000
DIRHOLD = 6000
STEPLEN = 3000
STEPSPACE = 3000This happened even though I set STEPGEN_MAXVEL and STEPGEN_MAXACCEL to be 25% higher than my MAX_VELOCITY and MAX_ACCELERATION values, as recommended.However, my power supply is a 32V 10A unit running three axes, so it might be a bit underpowered. Could this be the cause of the joint following errors?
I do have another similar power supply available, so I could use it to power one axis separately—this would help with the available current, but not increase the voltage.Any advice or experience with similar situations would be appreciated!

Hi everyone,I'm planning a retrofit for my Mécanumeric MF2040 (large-format pantograph) i'll dismantle all the eletronic and leave the structure. After some research, I’m considering the following setup and would appreciate advice or feedback:Controller & Interface:

• LinuxCNC running on an old (but reliable) PC
• Mesa 7i76e Ethernet motion controller

Motors:

• 3x Delta B2 Servo Motors (220V, 750W, 2.39Nm, 3000rpm, ECMA-C20807RS)
  • Alternative: 3x Leadshine ELM0750DH80E-SS
• Z-axis motor: Still evaluating options

Usage:

• The machine is mainly used for cutting and engraving (pantograph work, large panels).

Questions:

1. Does this setup sound suitable for a machine of this size and type?
2. Any experience with these servo motors (Delta B2 vs Leadshine)? Reliability, tuning, integration?
3. Suggestions for the Z-axis motor?
4. Any compatibility issues or tips when using LinuxCNC with the Mesa 7i76e and these servo drives?

Thank you in advance for your advice and suggestions!

The longs motor DM542A is better than you think and is my choice of drives for NEMA23 motors if price is important.
With 25x microstepping and 48v power supply, I used the following setttings