> On Aug 4, 2023, at 1:16 PM, Gordon Henderson via cctalk
> <[email protected]> wrote:
>
> On Fri, 4 Aug 2023, Paul Koning via cctalk wrote:
>
>>> On Aug 4, 2023, at 9:05 AM, Gordon Henderson via cctalk
>>> <[email protected]> wrote:
>>>
>>>
>>> I have a HiPlot plotter - it's DMP-29, but I'm fairly sure it takes the
>>> same pens as the DMP-2 which I also have but in a million pieces - but
>>> right now without pens.
>>>
>>> I have been promised some but it may be many weeks...
>>>
>>> I'm wondering if anyone has any old (or NOS?) pens for them? What I'm after
>>> is the dimensions with a view to 3D printing new pens - or at least pen
>>> holders so I can fit modern pens into. (There is no height restriction on
>>> the pen bodys)
>>>
>>> Can anyone help?
>>
>> Some searching turned up this:
>>
>> https://www.buz-line.com/p-1766-hi-plotter-pens-k-style-for-dpp-houston-instrument-similar-plotters.aspx
>>
>> Expensive...
>
> And it's not quite the right profile.
>
>> It's hard to be sure, but I wonder if a standard Rotring (a.k.a.,
>> Radiograph) technical pen will work. Those were commonly used in plotters,
>> for example I remember using a Calcomp plotter with one of those. And those
>> are obviously refillable, and available in any number of sizes. Not to
>> mention great drawing tools to have around -- I wonder where mine is.
>
> They have a stepped profile which seems different from other plotters of the
> era (HP, etc.) so no different from inkjet cartridges now, I guess.
Some more searching turned up an old reference to adapters for various plotters
for Koh-I-Noor "Rapidoplot" plotter pens, which I believe are the same as
Rapidograph minus the body for holding the pen in the hand. And another
https://www.farnell.com/datasheets/99601.pdf
<https://www.farnell.com/datasheets/99601.pdf> shows adapters for Mars
technical pens, that's another brand I remember for the same kind of pens. It
mentions part number 75PL03H10 and a search for that turns up a Rakuten website
(in French) offering it.
paul
