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  • Ringardy
  • Ringardy
18 Nov 2025 12:44
Setting up a Mesa 7i95T was created by Ringardy

Setting up a Mesa 7i95T

Category: Configuration Tools

Hi,
i am currently trying to setup my Mesa 7i95T but so far i hit a wall.
Problem is even after following a video to set it up via pncconf using the 7i76e, i get no working results.
The video i am reffering to : 


Check the images to what im reffering to.

Perhaps there are files out for the 7i95T.

And yes i did check the forum and tried to update the pncconf but it wont let me.

Kind regrads
Ringardy
 
  • kor
  • kor
06 Nov 2025 10:26 - 06 Nov 2025 10:59

pc for linuxcnc using ethercat and Mesa

Category: Computers and Hardware

I am looking to buy a "firewall" PC with 4 ethernet ports to have one ethernet port for my mesa 7i76e one for ethercat and one for LAN.
Do you have recommendations for that currently I am looking at this system on amazon: amzn.to/4nEujde it has 4 x i226-V 2.5Gigabit Ethernet ports and seems to be fine for a linuxcnc build what do you think.

Or do you think I should rather get a normal big pc and get pci-express lan cards?
 
  • 2tinker
  • 2tinker
03 Nov 2025 16:04
Replied by 2tinker on topic MESA 7i76eu – I/O - Spannungsversorgung

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

So werde ich es machen.
Vielen lieben Dank!
  • PCW
  • PCW's Avatar
03 Nov 2025 15:43

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

I would probably add a series resistor so so if you accidentally ground the ALM- output you do not damage the optocoupler

so:

+12V --> 1K resistor --> ALM+
ALM- --> 7I76EU input
  • MusicCityMfg
  • MusicCityMfg's Avatar
03 Nov 2025 13:06

Mesa 7i96S Daughter Card Question ... Can I use the 7i76U?

Category: Driver Boards

I read the  Which Mesa Card Should I Buy?  post and it was super helpful.

I wanted to buy a Mesa 7i76EU card today but they are out of stock. They are also out of stock on the 7i77 daughter card.

So, I hope to buy a  7i96S today, but I need to know what daughter board I can use to increase the number of inputs an outputs?

Can I use the  7i76U ?

I am doing a manual lathe CNC conversion. I'm eventually going to be adding a 12 tool ATC turret.

I have not finalized all the required I/O yet, so I wanna make sure that I have enough I/O for future updates to the lathe.

If I can use the  7i76U , I think I will have plenty of I/O for future updates, that may include​ ...
  • a third MPG
  • an encoder on the ATC turret for tool location/identification,
  • a "Y" axis, three motor, four gang live tool option with an MPG (this last addition is way in the future if at all). 
Thanks,
Chris​​​​​​
  • 2tinker
  • 2tinker
03 Nov 2025 08:23
Replied by 2tinker on topic MESA 7i76eu – I/O - Spannungsversorgung

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

@PCW, @tommylight,
vielen Dank für die Tipps.
Wenn ich meine 12V direkt auf den Alarm des Motors geben kann, wäre das natürlich das einfachste.

@PCW
In der Beschreibung des Schrittmotores habe ich nun auch die richtige Stelle gefunden.
 
Was meinst du, ist der Vorwiederstand bereits im Motor verbaut, oder sollte ich da einen vorsetzen?

Danke und Grüße,
2tinker
  • PCW
  • PCW's Avatar
02 Nov 2025 13:40

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

The drive manual shows that the alarm output is an optocoupler
This can connect directly to the 7I76UE field inputs


+24V --> ALM+
ALM- --> 7I76EU field input

 
  • tommylight
  • tommylight's Avatar
02 Nov 2025 13:32
Replied by tommylight on topic MESA 7i76eu – I/O - Spannungsversorgung

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

Mesa 7i76 should have 4 analog inputs (do check if EU has) that you can use for amplifier fault at 5V, but it will require some HAL editing.
Should be field inputs 0-3
  • 2tinker
  • 2tinker
02 Nov 2025 13:02
Replied by 2tinker on topic MESA 7i76eu – I/O - Spannungsversorgung

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

Meinst du ein mechanisches Relay?
  • Plasmanfm
  • Plasmanfm
02 Nov 2025 09:15 - 02 Nov 2025 09:24
Replied by Plasmanfm on topic MESA 7i76eu – I/O - Spannungsversorgung

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

Wenn das Alarmsignal des Steppmotors nur 5 V liefert dann schalte doch mit dieser ein Relais das die 12 V Ein und Ausschaltet
und lege die 12 V auf den PIN

Juergen
  • 2tinker
  • 2tinker
02 Nov 2025 07:29
Replied by 2tinker on topic MESA 7i76eu – I/O - Spannungsversorgung

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

Ich habe das Support Manual.

"The 7I76EU field inputs have a nominal input resistance of 10K Ohms to field power ground. 7I76EU inputs sense positive input voltages above a preset threshold. For best general purpose use, default input threshold is 50% of the field power supply voltage with 10% hysteresis. That is with a 24V field voltage an input must be brought to 60% of 24V= 14.4V to be sensed as high and then brought to 40% of 24V = 9.6V to be sensed as low.These accurate thresholds and hysteresis allow high speed field signal detection whilemaintaining excellent noise immunity."

So wie ich das verstehe müssten bei 12V mindestens 7,2V anliegen um ein "High"-Signal zu erhalten.
Damit komme ich ohne eine kleine Verstärkerschaltung nicht weiter.
Richtig?

Als Schrittmotor möchte ich gerne diese verwenden...
www.omc-stepperonline.com/ess-series-2-2...vdc-1000cpr-ess23-20
  • PCW
  • PCW's Avatar
01 Nov 2025 17:40

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

Do you have the drive manual?

Is this a 5V push-pull output?

 
  • 2tinker
  • 2tinker
01 Nov 2025 16:53

MESA 7i76eu – I/O - Spannungsversorgung

Category: Deutsch

Dank Hilfe aus diesem Forum bin ich jetzt ein Stückchen weiter.
Den I/O-Bereich meine 7i76eu (TB1) habe ich an einen 12V Ausgang meines ATX-Netzteiles angeschlossen. Ebenso den P4 (mit 5V).
Die Näherungssensoren für „Home“ liefern entsprechend ein verwertbares „True“ auf der Karte.
Ein SSR, dass das 48V-Netzteil für die Schrittmotoren einschaltet funktioniert auch.
(Netter Nebeneffekt ist, das ich mir das Enabled der Motoren sparen kann)
Jetzt stehe ich vor der Frage, wie ich das Alarmsignal der geplanten Closed-Loop-Schrittmotoren (die ja nur 5V liefern) in die Software bringe.
Die „Input’s“ der Karte scheinen nur auf die 12V zu reagieren.

=11.0ptMuss ich da einen Transistor zwischenschalten, der mir aus den 5V ein 12V Signal macht?
=11.0ptWenn ja, was sollte ich da am besten nehmen (Transistor/Schaltung)=11.0ptOder gibt es noch eine andere Möglichkeit?

Grüße, 2tinker
  • PCW
  • PCW's Avatar
01 Nov 2025 03:41
Replied by PCW on topic optimising the computer for linuxCNC

optimising the computer for linuxCNC

Category: General LinuxCNC Questions

What are the following error limits set for?

Do you lose packets?

That is, what is hm2_7i76e.0.packet-error-total?

Can you post your hal / ini files?

Do you have the usual optimizations:

isolcpus = last cpu in grub (isocpus=3 for a 4 core CPU for example)

IRQ coalescing off with Intel MACS

DKMS driver installed with RealTek MACs

Ethernet IRQ pinned to last processor
 
  • LeonDolnicar
  • LeonDolnicar
31 Oct 2025 20:36
optimising the computer for linuxCNC was created by LeonDolnicar

optimising the computer for linuxCNC

Category: General LinuxCNC Questions

Hello from Slovenia

I built a 3 axis CNC milling machine. To run it I use a PC and mesa 7i76eu. They work well but every now and then I get an following error. To minimize this I increased latency from 1000000 to 1500000. Following errors are now less common (sey aonce per two hours of running). It is not critical but still it is anoying to rehome the machine. Is there anything I can do to optimize the computer and mesa comunication so there will not be any following errors.

thank you,
Leon Dolničar
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