(Topic ID: 214390)

Crummy drawing in Space Mission schematics


By rolf_martin_062

1 year ago



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  • 4 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by rolf_martin_062
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0Sp-Mi-Work-22 (resized).jpg
0Sp-Mi-Work-21 (resized).jpg

#1 1 year ago

Hi
I was brooding over "Make-and-Make-Switches" and "Make-and-Brake-Switches" and stumbled over a crummy drawing in the (ipdb) schematics "Space Mission".

The first JPG is self-explaining - Make-and-Brake-Switches are of "either - or" functionality --- or then they are "an N.O.-Switch and an N.C-Switch mounted as an threebladed switch (very often on the Score-Motor)". Also known are references: "To wire-this-color".

Studying the Space Mission schematics I have seen an CRUMMY drawing - see the second JPG: I would like to see the "good" part and the "AA" part - BUT Williams did: "Good" part and the "BB" part - means: The BRAKE-Part of motor-5B IS DRAWN TWICE --- and there is also the reference "To R-BR" - hard to understand such crummy schematics (look it up in the ipdb-schematics). Greetings Rolf

0Sp-Mi-Work-21 (resized).jpg

0Sp-Mi-Work-22 (resized).jpg

#3 1 year ago

Eh, there's places later in boards where they just don't bother putting the chip or transistor number. It's just IC?? or Q? in the schematics. It's tradition!

#4 1 year ago

Hi
on the bottom in the first JPG in post-1, "written in green" I wrote: "actually" --- maybe not so good usage of this word. True is: In the pin mounted are three blades. Maybe I should have writed / written: "The functionality is (rather / actually): At some time the MAKE-Part is used --- at another time the BRAKE-Part is used". (((Every feature calling for help of the Score-Motor to do a turn: Every feature has "Feature-Switch(es) to close to accept / let pass what Motor-Switches are delivering".)))

Adjusting the gappings in a Make-and-Brake-Switch can be tricky --- many people say "the Brake-Part must open before the Make-Part closes". I also like to have it this way --- needed is this on "either - or" functionality switches. When the functionality is "electrically an N.O.-Switch and an N.C.-Switch mounted - using three blades": Usually it does not matter - the Make-Part may close before the Brake-Part opens --- remember: There are "Feature switches" closing when a specific function is calling for help of a motor turn (((and a feature not calling has its feature switch(es) open and the motor-switches may do whatever they want to do - Feature switches have the control))). Greetings Rolf

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