Successful 3D printed version test 8/9/25 - all thanks to modeler/printer John Toebes
A short movie!
(17.3MB)
SLS production prototype - test 8/15/25
RIBBON: Cassette - black nylon tape, 16 yards long, 0.0045 thk, 0.52 in. wide, 75 rpm speed
Mfr NCR part no. 197939, E-systems dwg 69-00402-001
NSN 7510-01-297-6428
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| bottom - ends of lift handle are heated to mushroom |
clipped the ends and removed lift hadle |
lift handle holes on top |
top is held on via 4 pins inserted into bottom |
| top removed |
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| details of head - it is attached to the body via three small
flexible strips to let it "float" |
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ribbon advance gear is held against idler by small metal
spring piece |
advance gear assembly slides out |
idler is held in place by tension from advance gear |
| Gear photos 7/28/25 | |||
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| top |
bottom |
side |
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| Drive shaft |
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| Ribbon must be spliced to make a loop | |||
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Successful 3D printed version test 8/9/25 - all thanks to modeler/printer John Toebes |
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| First test |
Top on |
Success! |
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| It took several iterations |
Happy John |
A short movie!
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SLS production prototype - test 8/15/25 |
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Ribbon loop from an old busted cartridge |
Old ribbon but good enough for testing
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