[GreenKeys] Friden SPD-V

Sat Feb 18 16:45:38 EST 2017

download SP8591_Flexowriter_Technical_Manual_1959 and look at pdf page 
353 and the schematic om page 359. the system is described there. 
although I have not been able to locate my schematic of the parity 
check, it should be possible to check its working because of the whole 
bunch of contacts, only two wires leave the module (if i recall 
correctly, the machine is not in my home right now)

simon

On 18-02-17 22:05, Michael Zahorik wrote:
> Geeezzz... the 'E' problem has come back, but with having the print that
> Gary provided, it was easy to see that the Anti Repeat really was
> causing the problem. So, although I do not see the E repeating something
> is causing that key to want or look like it is repeating. Well,
> something for tomorrow.
>
> Mike Zahorik (414) 254-6768
>
>
> ------------------------------------------------------------------------
> *From:* Michael Zahorik <m.zahorik at sbcglobal.net>
> *To:* Michael Zahorik <m.zahorik at sbcglobal.net>; simon <simski at dds.nl>;
> "GreenKeys at mailman.qth.net" <GreenKeys at mailman.qth.net>
> *Sent:* Friday, February 17, 2017 7:07 PM
> *Subject:* Re: [GreenKeys] Friden SPD-V
>
> Well..... I think that I had a sticky punch rod and that was the reason
> the 'E' key would lock out the keyboard. I removed the punch unit and
> operated it by hand to see what was happening. I could see that some of
> the punch rods were free and traveled back and forth easily, while
> others were sluggish. With some lube and soak time, then a few hundred
> by hand operations all the punch rods seem to be free. Reassembled it
> and now the 'E' key works with the punch unit on. Yet, the feed tape
> still causes a parity error and drops out the keyboard lock relay. I
> spent a lot of time trying to trace out the parity circuit. I still can
> not find any Friden print that shows any sort of parity circuit. My
> attempt to trace this out, just gave me a headache. My poor eye sight
> and this tucked inside meant I had to use a mirror to see some areas. I
> got confused with the backwards versus the frontward stuff. BUT... From
> what I could tell the feed punch rod only operates one normally open
> contact and this contact will drop out the lock relay. I can not see
> another contact in series with this contact. In fact if I just short
> this contact the lock relay will drop out. I wonder why the feed punch
> would even be involved with parity? I wonder if after you feed tape, you
> have to switch the punch on and off? Can anyone verify that for me? That
> is with the punch unit on, feed the paper tape, then is the keyboard
> locked after that, or not? I still maybe missing something. Thanks Mike.
>
> Mike Zahorik (414) 254-6768
>
>
> ------------------------------------------------------------------------
> *From:* Michael Zahorik <m.zahorik at sbcglobal.net>
> *To:* simon <simski at dds.nl>; "GreenKeys at mailman.qth.net"
> <GreenKeys at mailman.qth.net>
> *Sent:* Friday, February 17, 2017 1:10 PM
> *Subject:* Re: [GreenKeys] Friden SPD-V
>
> Simon, I have not found the schematic yet and also little on the parity
> stuff. But the parity idea was a good clue. Just below the punch rods
> are a number of contacts that only have two wires leaving the set. I
> assume these are the parity contacts. So I just removed the 2 wires and
> now the Feed Tape switch works, but the 'E' key will not. I also shorted
> the two parity wires and it indeed drops out the keyboard lock relay, so
> this is part of the problem. I will have to more closely inspect all the
> contacts. Something is either stuck, welded or ???? The 'E' seems to
> work a few times with the parity off, but still locks up the keyboard
> after one or two punches. Thanks for the help, still looking for the
> schematic and why the 'E' key doesn't work correctly when punching. Mike
>
> Mike Zahorik (414) 254-6768
>
>
> ------------------------------------------------------------------------
> *From:* simon <simski at dds.nl>
> *To:* Michael Zahorik <m.zahorik at sbcglobal.net>
> *Sent:* Friday, February 17, 2017 11:30 AM
> *Subject:* Re: [GreenKeys] Friden SPD-V
>
> that is the parity check kicking in. probably a faulty contact in the
> array of contacts in the punch module. the schematics are available at
> bitsavers but several flexo types are combined into one pdf
>
> On 17-02-17 17:54, Michael Zahorik wrote:
>> I have my Flexowriter working pretty good. I had JJ Short recover my
>> power roller which repaired a number of items in the typing unit. I'm
>> adjusting the impact of the hammers. Seems some keys hardly hit the
>> paper, while others smash through the paper. The last few days I have
>> been trouble shooting a problem with the paper punch. Seems that when
>> ever the 'E' key is typed with the punch unit on, the key lock will
>> occur. The 'E' works fine with the punch off. This also happens after
>> the Tape Feed button is used. No other keys or switches will do this. I
>> found that the LKL relay drops out when this happens. My current trouble
>> is that I do not have a schematic for the SPD model. I have a schematic
>> for the FL model, but they are not the same. Does anyone have this
>> schematic or a link to where I can find one? Thanks for the help.
>>
>> Mike Zahorik (414) 254-6768
>>
>>
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