Fwd: How to disassemble the DEC PC05 puncher unit?

Jörg Hoppe j_hoppe at t-online.de
Sun Jul 12 08:59:35 CDT 2015

Am 12.07.2015 um 15:47 schrieb Johnny Billquist:
> On 2015-07-12 15:40, Jörg Hoppe wrote:
>> Am 12.07.2015 um 14:40 schrieb Johnny Billquist:
>>> On 2015-07-12 13:55, Jörg Hoppe wrote:
>>>> Hi,
>>>>   I have an broken DEC PC05 puncher unit here.
>>>> It seems the shaft which transfers motor power to the excenter
>>>> mechanism
>>>> is broken in the inside.
>>>> So i need to dissassemble the whole unit, but have no idea where to
>>>> start.
>>>> I've read somewhere the mechanical puncher unit is not made by DEC but
>>>> by some other company.
>>>> Is there any known documentation about the DEC PC05 puncher ?
>>> There are several manuals at bitsavers. Why didn't you even bother
>>> checking before posting?
>>> http://bitsavers.trailing-edge.com/pdf/dec/papertape/
>> Johnny,
>> of course I know the bitsavers manuals ... I'm living with them since
>> months. I'm not searching docs about the whole PC05, but about the
>> mechanical puncher unit inside. The only info about the puncher are 3
>> pages in DEC-00-PC0A-D_PC04_Manual.pdf with adjustments instructions,
>> extracted by DEC from some original documentation.
>> I'm searching for an explosive view and disassembly instructions.
>> The manufacturer of the puncher unit seems to be "Royal Typewriter",
>> still in existence. But I found no doc about their paper tape puncher.
> The manual actually states, as the first sentence of those three pages:
> "This section contains adjustment procedures for the punch mechanism.
> Additional information can be obtained from the _Roytron Maintenance
> Manual_, which is supplied with each unit."
I was fooled by the foot note on page 5-16 of 
DEC-00-PC0A-D_PC04_Manual.pdf, saying:
"Reprinted with permission of Royal Typewriter Company ..."


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