Send a LVDS trigger to a MeteorII/CL

[psabat]

Hello all,

I have EMI in my machine and this make false triggers. I use opto-ttl trigger.

Whats the correct conection of the db9 cable?
Any suggestion to minimize false triggers?


I'm want to send a LVDS trigger to the framegrabber and I'm looking for a module that do this. Anyone has used LVDS trigger?

Thanks.

[tuxx-home.at]

Well, I must admit that I have no idea about what you are talking about.
Could you try to be a little bit more precise?

[psabat]

Ok, sorry


I have a machine vision system. I use a meteorII framegrabber conected to a Basler camera.

The trigger to the framegrabber can be send by 2 ways:

- TTL --> voltage signal
- LVDS --> diferencial signal --> Low Voltage Diferencial Signal

TTL is capable to receiving interferences of magnetic fields generated by engines or other machines. Using a LVDS trigger you can avoid this interferences.

So I want to generate a LVDS signal or buy a module that permit to send LVDS signals to trigger my framegrabber.


Thanks.


PD:Sorry about my english.

[psabat]

I solve the problem

TTL-MODULE form EPIX.

If someone want some info, post here.

Bye

[tuxx-home.at]

Would be nice if you could provide a bit more details about your solution
just in case anyone else is having this problem in the future.
This forum is intended to be an ultimate knowledge base for Matrox users
on the Linux operating system and such information would be very nice to
have in here

[psabat]

I Know it
In last post I had haste...


My PLC sends the trigger to 24v and I want to transform it to a LVDS signal (differential signal)


TTL-Module + Matrox Meteor II / CL + Basler L101 2k


1. Well, First see the attach.

2. To Send a LVDS signal, I bought a TTL-MODULE from EPIX inc. (visit web)

3. I ask if they can change the pin out (DB9 diff-connector) of the TTL-MODULE to the configuration of the Matrox II / CL. they do it.

- Pin3 --> LVDS trigger ( - )
- Pin6 --> Ground
- Pin8 --> LVDS trigger ( + )


4. Also is needed to ajust de DCF or Ajust parameters of the Framegraber via Visual Basic.

DCF customization:
==================
-Open the DCF you have been using in Intellicam; -Select the "Exposure Signal" tab; -Select the "Timer 1" tab; -In the "Trigger Info" section
-Select "digital port"
-Select "RS-422"
-Select "positive edge"
-Perform "save as" of your customized DCF;

Note: RS-422 in the aforementioned drop down list should actually read differential in this specific case.


VB customization:
==================
'' LVDS
FormDigitizer.Digitizer1.TriggerEnabled = True
FormDigitizer.Digitizer1.UserInFormat = digLVDS
FormDigitizer.Digitizer1.TriggerMode = digLevelHigh
FormDigitizer.Digitizer1.TriggerSource = digHardwarePort1

Also use digLevelHigh to be more immune to interferences / EMI (false triggers)


I test it and it works very OK, zero or near zero false triggers with LVDS.


I hope it helps.

Pau




PD: I must improve my English.

[tuxx-home.at]

Many thanks for providing this detailed explanation here!