Home Time-line Collection Repair Info Links About

Details:

In many machines a carriage is mounted on top to accommodate correct positioning of the registers in relation to the input register.  The Facit works the other way around and moves the input register alongside the register unit which has a fixed position. The result is a very compact mechanism mounted inside. Unusual is the use of an alternating current motor in stead of the more usual universal motor. Also fairly new is the double isolation. It doesn’t need a grounded power cord.

The algorithm used in division differs from the usual restoring approach. In the restoring approach an immediate correction is applied when the divident becomes negative.  The CA2-16 uses the nonrestoring approach. Per output digit it saves one reverse movement of the input rotor.

In 1974, Büromaschinen Lexikon still mentiones the Facit 1007 similar to the CA2-16 but with a plastic cover. However it doesn’t mention it’s price anymore. It was catalogued as:  “Price on request”.  By this time electronic machines with memory were smaller, faster and much cheaper than the 1007.  They must have been hard to sell.

 

The photo mid-under shows two repair notes, one mentions the removal of grease, the other the replacement of a machine part.

The photo right-under shows the replica of the user manual. It was printed from a .pdf file.

Usage:

Addition/subtraction:   

Enter a number, then push the “+” or “-” key. At the end of the process both clear the Reg - I   input register.

Multiplication:

Enter the 1st  number,  push “X”,  enter the 2nd  number, push “X=”

Square:

Enter the number to be squared, then push “X=”

Division:

Enter the 1st  number, push the “:”, then enter the 2nd  number and push the “:=” button.

Function of some keys, switches etc:

• The blue I, II and III keys clear the respective registers
• The “R+” or “R-” key are similar to “+” and  “-”, but do not clear the input register.
• Addition/subtraction operations ate not counted in Reg-II, unless the white key “REG-II“ is pressed.
• “REG-1” prevents automatic clearance of Reg-I and of the multiplication register.
• “A+” and “A-”  add/subtract the contents of Reg-III in Reg-II.  So actually using Reg.II as a memory
• Both, Reg-II and Reg-III can be transferred to the input register Reg-I using respectively  “IIv”  and “IIIv”
  If Reg-I contains a number, the transfer is automatically followed by a multiplication.
• The small keys “16”, “13”, “9”  determine which digits will be transferred.
• The “C” key interrupts a division.  An endless division (e.g. when accidentally dividing by zero) can be stopped.
•  In case of successive multiplications the results are added in Reg-III.  
  When the “NEG” key is depressed before the “X=“ the result is subtracted in Reg-III.
  If the “NEG” key is depressed before the “:= “ the negative result overwrites the contents of Reg-II.

For a detailed overview of function keys

• See Keys Functions (pdf) on the assets page

Click to view a full size picture (opens in a new tab)

Serial number:

Built in:

Functions:

Rotation speed:

Market-introduction:

Production until:

Price:

1524137

1965

Addition, Subtraction, Fully automatic Multiplication, Square and Division, Backtransfer and Memory

420 rot/min

1962

1967  (Production continued with the 1007 until 1972. It is the same machine with plastic cover)

DM. 2745,- in 1962  (Source: Büromaschinen Lexikon)