[GreenKeys] strange printing SOLVED!

[Eugene Hertz]

GIVE THAT MAN A CIGAR!

So I was hunting down electrical problems, but Gil had it! Adjusting the range on the printer did the job!  I guess adding the lpr did create just enough distortion on the loop to throw it out of whack. 

Looks like moving the adjustment from 80 to about 90 seem to do the trick. I will try to center this value by adjusting and finding the number at either end of the range then take the average setting to find the center.

I am still curious though about the polarity (phase?) of the selector magnets. Anyone know if it makes a difference?

Gil, thanks a million! Should make tomorrow's demonstration much nicer to watch

and thanks to everyone else who offered help, I sure hope I can help one of you some time

Now back my my clunk on FIGS on the KSR and trying to bring 4 more ST6's back to life!
Eugene


>-----Original Message-----
>From: Richard M. Gillingham [mailto:rmoodyg at bellsouth.net]
>Sent: Friday, August 25, 2006 08:54 PM
>To: 'Eugene Hertz', greenkeys at mailman.qth.net
>Subject: Re: [GreenKeys] strange printing with LPR?
>
>Have you checked the range adjustment of the selector on the printer?? If 
>the range adjustment is not set correctly, then minimal distortion will 
>degrade the quality of the print. 
> 
>I'd start there. 
> 
>Good luck, 
>Gil, W1RG 
> 
>----- Original Message ----- 
>From: "Eugene Hertz" <ehertz at tcaf.org> 
>To: <greenkeys at mailman.qth.net> 
>Sent: Friday, August 25, 2006 7:25 PM 
>Subject: [GreenKeys] strange printing with LPR? 
> 
> 
>Hello all, 
> 
>Ok, so my next problem. I have not been punching tape with my M28ASR in a 
>few weeks since the tape jammed and I was too lazy to clear it out. So its 
>been a while. Today I cleared the jam and was printing off ITTY very well. 
>I decided I would try to punch some tape off the loop. In my ASR it has a 
>local loop supply that is keyed with a relay from the external loop. 
>Everything was working fine until I switched in the typing reperf (yes I 
>have the reset bail manually cleared from the code bars). I should mention 
>that the main knob is in the K mode for this. 
> 
>When I do this, the reperf perfs perfectly fine, however the printer which 
>is now in series with it, starts to print junk. When I take the LPR out of 
>the loop it returns to printing normally again. I have a switch at the 
>operators position of the ASR to switch the lpr into the loop. 
> 
>Any ideas? Whats baffling is that the reperf perfs away correctly, not a 
>missed character. I would think that if the loop was being bogged down 
>somehow by adding in the lpr that both the printer and the lpr would be 
>degraded. There is an adjustment for the internal loop (I have never tried 
>to measure the internal loop voltage) but I wonder if I may need to tweak? 
> 
>thoughts? 
>thanks 
>Eugene 
> 
> 
> 
> 
> 
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