Type name / number: Ascota (Klasse) 314 (Electrical motor driven)
The 314 is produced at the VEB Secura Werke Berlin, which was first part of the Kombinat Zentronic (Headquarter in Erfurt). Daro is the brand / logo of this Kombinat, which was later merged under the VEB Kombinat Robotron in 1979.
Production / SN: 314-473723
Calculating principle: Rocking Segment technology and Ten key keyboard
Calculating functions: Add, Subtract and short Multiplication
Input accuracy 12 digits (for multiplication 1x11- or 6x6 digits)
Calculating accuracy: 12 digits
Extra's: The short multiplication is implemented via an extra register on the bottom of the machine! This means multiplying for instance time 9 is first times ten (one digit higher) and minus one, so in two cycles, much shorter than in the nine cycles.
Back annotation of the result??
Very fast 170 instructions / minute are specified.
Like all the 1xx and 3xx series the motor is not directly connected to the machine main axis, it has a clutch in between (see machine story below)
Designer: ?
Production year: between 1973 and ...
Case material: plastic
Weight: 11,2 Kg
External links: http://www.robotrontechnik.de/index.htm?/html/computer/ascota.htm
http://www.rechnerlexikon.de/artikel/Ascota_Klasse_314
Previous owner: Mr. B. Hempel, Drebach (Chemnitz area) Sachsen, Germany
Cosmetic imperfections:
(I accuse no one)
The case was partly darkened / browned due to sun exposure.
Date of receiving: 2012-06-25
Machine story:

2012-08-05
First calculation checks on machine, are ok. First photo of the un cleaned situation.

2012-08-07
Keyboard unit out of order. The force during removing of the key tops was obviously to high. The metal bar of the keys was bended to one side. That's why the lower part came out of the gliding hole below, the second layer, for a number of key's. Severe problem!!
Need some experienced help to reassemble those!
The machine was blocking / holding between two stages and what is never experienced before, with an other machine of this series, the motor was still turning. A clutch was showing his work. (The clutch was as well confirmed reported by Mr. Rüdiger Kurth, the webmaster of Robotrontechnik!)

2012-08-09
Got some nice, valuable and very help full pictures of the keyboard pin names from the above mentioned Robotrontechnik webmaster. We discus as well on the holding between two stages. Two pictures are added (41-... and 42-..) .
Two pictures added (55-.. and 60-..) of the bottom site. Here you see the extra register for the multiplication. The multiplicand is stored first in the pinblock. When entering the multiply key, it is transferred into this separate register. The actual multiplication is sequential read out digit by digit and the content (the other number) of the pinblock repetitive added until the digit of this register is zero. Then to the next digit and so on.

2012-09-03
Comparing the lock situation between the 110 and 314 and the information of the Robotron webmaster, the unlocking mechanism / arm activated and a "click" sound was telling the good news. After that the machine was free in turning by hand.
Now an add and the total functions are started to puss the plates of those separately. Both are performing well. The pinblock is shifted after each number plate activation.
So this seems to be solved. Now the reconstruction of the keyboard is still a big task!

2012-09-26 .
After several tries / methods to reassemble the key board, I finally gave up, an enormous disappointment! I consider it as impossible job without special tools. I am still wondering how they done it at the factory. The difficulty is to position and justify all the individual key plates who have at leased one leg in a hole in the bottom plate of the unit, and one leg in a ball unit who prevent multiple key pressure, so an unstable situation. An few aid plates should placed and get the key board top plate mounted above those. How did they do it ????
With a second machine for 5 euro on eBay the need is vanished to save the machine but it still bothers me!
So for demonstration purpose and my own learning experience, I have decided to dismantle this machine in the functional modules one of the design features of this series 1xx and 314. (please see the picture) and compare some parts with the early Astra 110, who was damaged during transport.
With the proceeding knowledge on the separate key board unit it came a possibility of mounting the keyboard plates, think up side douwn. When they had a block with the same openings as the top layer / plate, but thicker, to hold the key plate in upright position, they cold place all the key plates in it, springs placed as wel the aid plates and put the unit over it. Now each key plate has to justify a little to come in the openings of the second layer plate. Good be like this? Or has sombody a better solution? Nice to know for others, allthough it is to late for this machine.

 

 

 

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