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So, I've done a lot of progress . After I changed the usb  to RS232 cable( don't buy low quality RS232 to usb cable) I've been able to connect to my driver and configure the external enable and the internal disengage of the motor brake(you need to power the io from external 24v source with Leadshine) . After all this i wired a 24v Finder relay for the motor enable commanded by the mesa,when i launch the program the mesa power  the relay and enable all the drivers. Now  I'm able to move the axis from linuxcnc, but i think I'll change the basic Axis gui with probebasic for more userfriendly interface. For the motor wiring I have to thank the Leadshine tech support, they reply very fast, and for mesa i refered to this guy video  (very helpfull, the 7i76EU version it's same wiring confirmed by Mesa tech support , for shematics and 3d support prototipe refer to this  and official 7i76E pdf ). So now i've to do some tests and project all the electrical supply for all that stuff, and i have to adapt the motors to the mecanical part with new mounting plates(i think i will design them with Fusion 360 and buy them from PCBway machining or other). That's all.

Also are the drives enabled?

Typically servo drives would have an enable input that must be connected to operate
(with default setup parameters)

Note that if LinuxCNC cannot communicate with the 7I76EU, LinuxCNC will not start.

I wired all the the motors, but i can't move with linuxcnc and the mesa board , i've done the basic configuration and followed the this post  because the configurator couldn't find the mesa but after following the instruction the mesa is recognised. My issue now is that i can't command the motors from mesa and motion control of leadshine can't find the driver(i've contacted the even  the techsupport of leadshine , and no solution finded). For the wiring i followed this  and the official pdf. The wiring should be good, i don't think i've done something wrong . A the moment i've some doubts if linuxcnc can communicate with the mesa, but if i unplug the ethernet cable in linuxcnc it's reported an error so i think they are talking. I share the photo's of my wiring. 
Has anyone experienced a similar problem? Is there a way to further test the Mesa board’s output, or any diagnostics I can run in LinuxCNC? Any advice would be greatly appreciated!

 So, just arrived the order for my retrofit .  I bought Mesa 7i76EU (i've done the configuration of Linuxcnc in a hold pc), than  Leadshine ELM1  , 3 of them 750w and one small 400w  and the drivers  EL6 for all the motors with different power supply. Im bit struggling because i can't connect the Motion Studio software to my driver for some tests idk if its the cable or other. I need to do a bit of wiring, and discover where to plug the brake of the motors , becausa i mounted all but i don't understand if i have to wire it with a another circuit with relays and a powersupply or if i can control it from the driver , didn't discovered it yet i need to check the schematics a few more times. If someone has any advices , or any experience with Leadshine motors and driver it's appreciated.
 

forum.linuxcnc.org/27-driver-boards/3559...ethernet-mesa-boards
 

Remove the .DOC file, attach the full file as a normal .txt using a simple text editor.
Do not use Office suits.
-
All office files can contain macro viruses, avoid using them unless strictly necessary.

Edit:
In the mean time fix the networking
forum.linuxcnc.org/27-driver-boards/3559...ethernet-mesa-boards

That's actually rather strange behavior and may have to do with
the 7I76E analog output being unsigned.

Can you post your hal/ini files?

I would get open loop working well first with P,I,D == 0
and FF0 = 1, then try to slowly add some P and I

(you will never get good control without FF0)

Also plotting the PID output will help with diagnosis

Hi all, 

Looking for some help with my closed loop spindle. It's a no-name "AT4" chinesium VFD driving a 3kW motor and a 2.2:1 belt drive to a BT30 spindle. Control is 0-5V from a 7i76e, encoder feedback from the motor shaft. The encoder is a 2500ppr unit I had left over so I'm only using the index pulse and have the encoder in counter mode because the A/B pulses were too fast. Encoder feedback into a 7i89.

Anyway, with P only control, I see the motor hunting a lot, a slow oscillation a few hundred rpm triangular wave, but I don't think it's as a result of too high P : there still a significant offset error so the oscillation is maintained even though the error is always a negative value (spindle slower than target). Lowering the P more increases the offset but doesn't change the amplitude or frequency of the oscillation, increasing P moves the speed closer to the setpoint but again no change in the oscillations. No screenshot but I can get one later on. Because it "hunts" even though the error is large and always one side of the setpoint makes me think it's not true hunting like a system with overly high P gain? The oscillation doesn't decay over time.. same behaviour with P anywhere from 0.8 to 10. 

I reduced P way down (to 0.5) and tried to get it working by using D to stop the oscillation and I to actually hit the setpoint, but it's still a bit shit so I think it could be much improved. I added a ramp constraint to the speed command to stop the vfd erroring out. There's an accel limit on the VFD side too so maybe that's affecting the control loop?  

It's getting to it's setpoint now but there's an over-acceleration initially, then a ramp that doesn't quite keep up, and then a weird over/undershoot/dip when the ramp ends and the I term seems to take over to slowly creep the speed to the setpoint. 

Can anyone who knows controls better than me suggest a methodology to follow to improve this?

First Question.

For a 1mm jog, I originally set my MUX40.in1 to 1.0. This was resulting in an exact 4mm jog each count. To fix this I need to set the scale below to 0.25. While I can do this and get the result I want, it bothers me that I have to use a ratio instead of direct number and will be harder to decode at latter dates. It seem arbritary that each count would be 4mm exact.

setp mux4.0.in1 1 (jogs 4 mm per count)

setp mux4.0.in1 0.25 (Jogs 1 mm per count)

net encoder-counts  <= encoder.0.counts
net encoder-counts => axis.x.jog-counts

Question is, where is the actual jog value recorded in LinuxCNC.? I cold find nothing in the .ini or .hal files that seems to indicated it would jog exactly 4mm each jog count.



Second question,

Per the below, I am currently using mux4 to determine the jog scale. But my MPG switch does is not using an encoder switch but instead has 3 simple outputs of which I placed into input 26 (1x), 27(10x), 28(100x)

I got everything to work but can not find any details in .hal how to use something other than mux4 logic to place the correct scale into the axis jog. This seems like it should be simple. More or less just want if one of those pins are true, the correct scale is selected. Below is partial code referancing the scale portion. Note. Only using pins 26 and 27 at the moment due to the mux4 requirements. Other than this, everything is working fine.

# This sets the scale that will be used based on the input to the mux4
setp mux4.0.in0 0.025
setp mux4.0.in1 0.25
setp mux4.0.in2 2.5

# The inputs to the mux4 component
net scale1 mux4.0.sel0 <= hm2_7i76e.0.7i76.0.0.input-26
net scale2 mux4.0.sel1 <= hm2_7i76e.0.7i76.0.0.input-27

# The output from the mux4 is sent to each axis jog scale
net mpg-scale <= mux4.0.out
net mpg-scale => axis.x.jog-scale

---

Basically want:

if Pin 26 true then axis.x.jog-scale == 0.025
if pin 27 true then axis.x.jog-scale == 0.25
if pin 28 true then axis.x.jog-scale == 2.5

Hallo Michael,

Danke für deine Antwort.Ich habe damals(ca.8 Jahren) mit LinuxCNC schon angefangen.Da hatte ich ein TB6560 Board von Modellbau Letmathe.Ich begann mit einen (China)Kreuztisch.Dann baute ich mir eine Portalfräse.Irgendwie bin ich auf den Planetcnc Controller gestossen.Denn habe ich genommen.
Zum Schluß wollte ich wieder umsteigen auf LinuxCNC.Habe mir dann eine MESA 7i76E gekauf und einen VFD mit Spindel.
Dann wurde ich krank und das Geld wurde knapp.Da verkaufte ich die Karte und Spindel wieder.

Jetzt habe ich nur das USB Board,die Motortreiber(Endstufen) und meinen Schaltschrank denn ich damals gebaut habe.
Ich habe sogar einen Pendant gebaut.Als USB HID Device,mit einen Teensy 3.2 und Joystick/Keypad.

Jetzt wollte ich das WHB04-4 Handrad in Planetcnc integrieren.Geht aber irgenwie nicht.Habe die .rules geändert usw. ......

Ich habe mir gedacht,man könnte die 26pin Schnittstelle verwenden.Ohne viel umzuverdrahten.

Hab gleich einen Termin.Melde mich wieder.

Grüße-Martin

---

Hello Michael,

Thanks for your answer.I started with LinuxCNC back then (about 8 years ago).I had a TB6560 board from Modellbau Letmathe.I started with a (China) cross table.then I built myself a portal milling machine.somehow I came across the Planetcnc controller.because I took it.
Finally I wanted to switch back to LinuxCNC and bought a MESA 7i76E and a VFD with spindle.
Then I got sick and ran out of money, so I sold the board and spindle again.

Now I only have the USB board, the motor drivers (power amplifiers) and my control cabinet that I built back then.
I even built a counterpart as a USB HID device with a Teensy 3.2 and joystick/keypad.

Now I wanted to integrate the WHB04-4 handwheel into Planetcnc, but somehow I couldn't. I changed the .rules etc. ......

I thought you could use the 26pin interface without having to rewire much.

I have an appointment in a few minutes.

Greetings-Martin

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.