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  • Dave2024
  • Dave2024's Avatar
23 Dec 2024 23:09

How to build a spaceship with Linuxcnc and a Mesa 7i76e

Category: Basic Configuration

I bet you just sold allot of Mesa 7i76e's with this video!  Cool, thanks
  • yoshimitsuspeed
  • yoshimitsuspeed
19 Dec 2024 00:02

Questions in trying to get my home built machine dialed in with a 7i76E

Category: General LinuxCNC Questions

Okay FML lol I was forgetting to enter M3 in MDI and hadn't tried the speed slider today.
After removing the negative on 24000 and everything seems to be working like it is supposed to. as far as I can tell so far.

Thanks
  • yoshimitsuspeed
  • yoshimitsuspeed
18 Dec 2024 23:35

Questions in trying to get my home built machine dialed in with a 7i76E

Category: General LinuxCNC Questions

Okay so just changing that to positive then trying to run the Spindle it turned on at the min speed and trying to slide the spindle speed or enter S RPM into mdi made no difference.

Out of curiosity I went back into pnconf to tick the "use +- for voltage direction"

This added the - to both these places.

[SPINDLE_0]
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 24000.0
OUTPUT_SCALE = -24000
OUTPUT_MIN_LIMIT = -24000
OUTPUT_MAX_LIMIT = 24000

Starting the UI (now running qtdragon), homing, then starting the spindle it went straight to 23500. I typed S5000 into mdi and it dropped back down to 3500 RPM displayed on the VFD and slow RPM on the spindle.
After that though changing s in mdi or sliding the spindle speed slider made no difference.

Also to note spindle RPM in the UI always shows 0.

Going back into pncconf and unchecking the "use +- for voltage direction" put it back to how it was before with the - only on Output_scale.

[SPINDLE_0]
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 24000.0
OUTPUT_SCALE = -24000
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 24000

I have deleted the - again but it doesn't seem to have made anything better.
  • PCW
  • PCW's Avatar
18 Dec 2024 21:36 - 18 Dec 2024 21:36

Questions in trying to get my home built machine dialed in with a 7i76E

Category: General LinuxCNC Questions

There may be multiple things needed to get the direction correct, but here is one error:

[SPINDLE_0]
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 24000.0
OUTPUT_SCALE = -24000 <<<<<<<<<< The 7I76E spindle output is unsigned so this must be positive
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 24000
  • yoshimitsuspeed
  • yoshimitsuspeed
18 Dec 2024 20:06

Questions in trying to get my home built machine dialed in with a 7i76E

Category: General LinuxCNC Questions

Ugh yeah I was too burned out to get logged in on the CNC computer last night lol.  

File Attachment:

File Name: Shopbot_20...2-18.hal
File Size:13 KB
 

File Attachment:

File Name: Shopbot_20...2-18.ini
File Size:6 KB
  • PCW
  • PCW's Avatar
  • yoshimitsuspeed
  • yoshimitsuspeed
18 Dec 2024 03:59

Questions in trying to get my home built machine dialed in with a 7i76E

Category: General LinuxCNC Questions

My second question right now and a much lower priority than getting the spindle working is getting a new tool setter working.

I have found some videos and how tos but again it seems like several different ways of doing things.

Right now I have the manual toolchanger.
I would like to set it up to set a tool before running a program.
Preferably also to be able to change tools during a program. I could of course manually set it then have the next tool as a separate program but I assume it should be easy to do a manual toolchange and set tool mid program right?

I am also seriously eying an ATC spindle so I want it to be ready to do multi tool config with different tools saved in the tool table.

The one video I watched with setup details did the tool setting through the probe tab in AXIS. When I couldn't find it I did a search and found a thread that said it isn't in AXIS 2.9 or not yet or something. That thread said I can still access it in another UI but it doesn't seem like the best way to do everything I want anyway.

What's the best way to set this all up and is there a good guide, video, etc?
  • yoshimitsuspeed
  • yoshimitsuspeed
18 Dec 2024 03:51

Questions in trying to get my home built machine dialed in with a 7i76E

Category: General LinuxCNC Questions

I am trying to get my Huanyang 2.2 kw VFD working properly. 
I set it up as  andypugh  describes here. 
forum.linuxcnc.org/27-driver-boards/3537...wiring-to-mesa-7i76e

I am still doing setup in pncconf and trying to do as much there as I can. I added the spindle setup and enabled spindle output in TB4. 
I am have been setting up for 10v speed control though I would love to use PWM if it was possible. 
Set voltage, max RPM, etc, in the spindle section of pncconf. 
I'm not sure whether I should be using "use +-voltage for direction" but it is not working properly either way. 
I was having issues with it only spinning one direction but messing with settings I do have it spinning both directions and with "invert motor direction" checked in the proper direction though it seems weird I should need to have that checked since it should all be set up to spin the proper direction. 

As it is set up right now it doesn't seem like the Mesa card is doing what it should be doing. 
If I start up linuxcnc and hit the spindle button it goes straight to 23k RPM and 9.5v on pin2-VI. 
If I slide the spindle override down it stays at 9.5v and RPM till it gets to about 30% and then drops to like 0.15v and spindle RPM drops to 3400 RPM per VFD display. Spindle speed is either 23k or 3.4k RPM. I haven't looked but maybe I set up a min speed in the VFD at some point. 

I also measured weird voltages on forward and reverse terminals but I don't remember all variables like whether I had +- voltage ticked. 
When I measured though I think with CW in Linuxcnc I measured 24v on forward terminal to ground and 24v between forward and reverse terminals. But when I put it in reverse (and the spindle did reverse) I showed no voltage between the ground I used before and no voltage between forward and reverse. 

I can't be bothered to set up and log into the forum on the machine right now but I can upload files or whatever if needed. I just have to imagine that either this is a simple fix or that there is a more comprehensive guide somewhere. 
The most frustrating thing with this is in a google search I have found like 6 different threads, how tos, etc, with wiring digrams that show 6 different ways and virtually no info on other settings to make the wiring configuration work properly. 



 
  • yoshimitsuspeed
  • yoshimitsuspeed
18 Dec 2024 03:34

Questions in trying to get my home built machine dialed in with a 7i76E

Category: General LinuxCNC Questions

I had this machine running years ago on a cheap controller. Then bought this 7i76e and got some basic functionality then the machine went into storage for years. 
Now I'm trying to get it properly set up and add some features. 
I thought I would make a thread for this phase of the project instead of each individual question. 

 
  • fully_defined
  • fully_defined's Avatar
15 Dec 2024 01:20
Replied by fully_defined on topic Teknic Clearpath SDSK wiring to 7i96s

Teknic Clearpath SDSK wiring to 7i96s

Category: General LinuxCNC Questions

Hi fully_defined,

I'm an engineer with Teknic and came across your post. While we're not familiar with the exact board and pinout, the ClearPath wiring makes sense. (Good suggestions PCW)

If you encounter any problems or have other questions, please reach out directly at 585-784-7454 or teknic.com/contact/.

Best regards,
- Aaron B. Teknic Servo Systems Engineer
 

Would you mind taking a second look? I have updated this post, and the image at the top reflects my current understanding of how to wire this. I think the only question relevant to you now is: now that I am powering the field inputs with 24v, can I get away with daisy chaining hlfb to save on inputs? I thought I recalled hearing that this is the preferred Teknic method, but I can't find anymore where I read that.

In this post, the OP said he figured it out and then the thread went cold. People had more questions that were unfortunately never addressed again: www.forum.linuxcnc.org/10-advanced-confi...fb-mesa-7i76e#114031

The purpose of this thread (the one you're reading now) is to create a definitive resource for myself and others to refer to later.
  • rodw
  • rodw's Avatar
12 Dec 2024 04:02

How to build a spaceship with Linuxcnc and a Mesa 7i76e

Category: Basic Configuration

I don't think there is a way to write from LInuxcnc to the MPG Screen. I think it must use the USB for that.
As far as the wiring goes, the circuit diagram on the receiver is all you need as each part is a seperate set of pins.
The estop is designed to be standards based with two redundant circuits but it works for a single sided estop as well.
You used to have to ask for a 5 volt encoder for mesa but now I think there is a switch to select between 5v and 24v on the board.
I always have used the digital I/O for axis and jog speed select to save pins (with a MUX8 or MUX4)

This recent config I did uses the same pendant and there is a seperate hal file and also a custom component to manage the three jogging buttons
github.com/rodw-au/showstopper

 
  • Wrightys99
  • Wrightys99
  • timo
  • timo
11 Dec 2024 06:05 - 11 Dec 2024 06:07

How to build a spaceship with Linuxcnc and a Mesa 7i76e

Category: Basic Configuration

Did you have a look at this?

linuxcnc.org/docs/html/examples/mpg.html

This gave me the basic idea, and then I could change the *.hal according to the requirements.
To me it looks that this wireless thing just connects to the machine like a normal wired device.

I am not using an "official encoder input" for the MPG just normal inputs were doing the job, So I did not change the bitfile on Mesa card plug and go kit.
  • Wrightys99
  • Wrightys99
10 Dec 2024 13:54

How to build a spaceship with Linuxcnc and a Mesa 7i76e

Category: Basic Configuration

Hi Rodw

I purchased the MPG pendant i think it might be the same as yours, although this has the screen.

www.aliexpress.com/item/1005002095130699...n.498.21ef1802xJ8JwX

I have been trying to find the post in the forum in which you discussed this so that i may add to it.

I purchased a 7i96s with a 7173 and a 7i95T. I will porobably go with the 7i95T as it has lots of I/O for future expansion on my CNC and some planned projects i would like to add to my CNC.

Im still new to CNC although i have been involved with 3D printing since its inception, which gives me some transferrable skills. Im an electrical engineer by trade so although a steep learning curve, im sure i will succeed in my venture.

The reason for my message is the pendant i bought i chose as it has the STWGP interface for connecting to my 7i95T.

Would you have a wiring diagram you used for your connections between your 7i76E and the STWGP.

Im just striking up a conversation with the manufacturer of the pendant and he has asked for a wiring diagram to check its suitablility.

I was hoping if you dont mind to use your connections as a base for my wiring scheme.

Anything further you can add or setup files would be greatly appreaciated, or if in the linuxcnc domain a link if you wouldnt mind.

Kindest regards
Andy
  • CNC_ANDI
  • CNC_ANDI
10 Dec 2024 11:03 - 10 Dec 2024 11:04
Replied by CNC_ANDI on topic Suche Mesa 7i76E

Suche Mesa 7i76E

Category: Deutsch

micha-cnc post=301075 userid=31321Hallo Andi,
krankheitsbedingt muss ich leider meine beiden Mesa Karten 7i76e und 7i85 abgeben.
beide sind neu und unbenutzt
bei Interesse bitte ich um Kontaktaufnahme mit mir
Gruß Michael


Danke für deine Antwort habe sie leider jetzt erst gelesen... Ich habe meine Karte reparieren lassen können. über eine ersatz denke ich noch nach, kommt auch immer auf den Preis an
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