[GreenKeys] Odd Print problems on ASR 33

[Teletypeparts]

Clay, 

The trouble is almost surely in the carriage.  Its a tough one to help with on line.  

Make sure that all the carriage bearings are still good with a little play but not too loose.  Two sets on each side and another in the bottom carriage drive.  Also two along the rear rail.  

Then check for any obstruction in the carriage racks that rotate the typewheel left and right.  That  seems to be the issue, rotating left and right.  Look for missing springs etc a lot before you think about adjustments.  

If you dont find anything I can give you a call sometime to help.  

Wayne




-----Original Message-----
From: Clay Archer <clay at ArcherServices.com>
To: greenkeys <greenkeys at mailman.qth.net>
Sent: Mon, Jul 22, 2013 9:58 am
Subject: [GreenKeys] Odd Print problems on ASR 33



I have a model 33 with an intermittent printing problem.   Actually, it seems to be getting worse.   I believe it’s in the print head lift / rotate area and not an ASCII decoding problem.   It only happens to a few characters and not related to a particular bit.   It will also punch the correct bit pattern while printing the wrong character.   It will print correctly all characters except the letter “O” which will print the letter “N”, then other characters will begin to print wrong like “A” will print an “I” (but only after trying to print an “O”).  Things will go back to normal after a carriage return.   The letter “O” will print correctly at the beginning of the line a couple times and then start printing “N”, like OONNNNNNN (all letters should be “O”) but it will punch all “O”’s correctly on the paper tape.  Another example: if I type “AAAAAAAOOOOOOAAAAAA”  it will print “AAAAAAANNNNNNIIIIII”   Other characters will print wrong, but only after you try to print an “O”.   It’s like the letter “O” is confusing the positioning on the head.  I think other characters will also cause the problem intermittently.
Any ideas?
Clay
 


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