Passap E6000 is a computer-controlled knitting machine. It has two needle beds. Each individual needle on the front needle bed can be controlled via a console. The needles on the rear needle bed are controlled mechanically. I have always dreamed of being able to control the rear needles via the computer as well. I knew it was somehow possible but had no idea how. The essential idea came from Hackerspace Bamberg (https://www.hackerspace-bamberg.de/Passap_pfaff_e6000, https://github.com/knitty/firmware/tree/master/software/Knitty ). The hackers have exchanged all parts from the back-needle bed with those of a front needle bed. For the new rear needle bed, a second front lock has been rebuilt.

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Juni 2021 New Version

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Video and photos of the console, the motor controller unit and interface.

If you would like to find out more, just ask.





Same mounting as the original console

Back of the console

Rear lock

Motor, window for the frequency converter. On the left: Motor interface. Black cable on the top of the red enclosure is the USB connection to the console.

frequency converter

Mounting frequency converter

Motor interface. Owen made the design of the board according to the previous interface, thank you Owen, the interface looks now much nicer. The Arduino is now on this interface.




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Passap Electra 4600 rebuilt (2020)

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In the video below (2020) you can see the knitting machine and the motor Electra 4600 in action. More detailed information will follow over the next few weeks.

What is new?

The electronics of the Passap Electra 4600 motor have been replaced by a frequency converter, an interface and a controller. More project details will follow over the next few weeks. The latest version of the software will be published on Github. I hope this information will help you to realize your own project.


Electra 4600 connected to the frequency converter

I actually wanted to integrate the Electra 4600 engine in my project. Unfortunately the Electra 4600 engine had malfunctions. The control circuit board was damaged. We couldn't find out if more was broken. For example, the linear voltage regulator (REG 1) got very hot.

Since the board is very expensive, My husband came up with the idea to control the motor via a frequency converter. As tests showed the motor works wonderfully with the frequency converter.





Now the motor is connected to a frequency converter. A newly built controller drives the frequency converter via an interface. The controller essentially consists of an Arduino Uno, LEDs and switches. The controller is connected to the interface via an RJ45. The RJ 11 sockets for the yarn break detection and autocolor (detects if more than one eyelet is up) are on the interface and produce an emergency stop if an error occurs.

The reset button is on the controller. The new controller will be monted on the original location (the upper part of the box is not yet printed). I can regulate the speed manually using the potentiometer and automatically via the Raspberry Pi software. In this way it is possible to keep the speed constant when changing colors, regardless of how slow or fast the motor otherwise runs.

I have uploaded the "Service Instruction for motor drives of electra 4" and the scheme of the interface.

The Software is uploaded on Github, click link below:

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