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O.K. I have got some news.

I started everything from scratch and noticed that the pint out show in this picture http://macpod.net/misc/sx2_tachometer/images/sx2_cn2_tachometer_port_pinout.jpg

is different to the connector Pins I got. On that connector I have bought,  Pin 7 is the middle (center) Pin , the outer Pins are 1-6 . (different to the picture)

I have connected it different to the shown picture, and now everything works well.

Maybe this helps to other users who have had problems soldering the cables shown in the picture.

Jeff thx anyway for your help :-)

Thomas

Hi Jeff,

I don't have a  logic analyzer, also I don't have the skill to work with one.

I found your page and bought the stuff to get it run described here with a Arduino board.

Do you think  we have a chance to  get it work in the near future ? (otherwise I would consider try to find a other solution maybe with a tachometer with a hall sensor or light sensor or something like this.

Thomas

Anyone got this work with the listed Arduino Sketch (code)?

I use a Arduino Nano to my Bernardo KF 20 L Super which is the same machine like a sx2 (just another label)

But I only get displayed the error message from the code : "communication Error 1 ".  :-[

Thomas