This is an interesting point. It would be very nice to be alerted =
audibly when an event is actually being received (occurring) in one of =
our data logging/analysis programs. I assume it's not that easy to do =
because of the varying noise and event levels. Ed.=20
With the drum recorder I am preserving a bit of history and the drum =
is what impresses visitors. It is also my warning signal as it sits in =
our living room and you can hear the pen skritching on the paper when =
the quake comes in. To me, nothing beats the WOW-factor of watching a =
world-class quake come in on a drum recorder.
George
At 07:36 AM 10/28/2009, you wrote:
For a lot less trouble why not simply get
A wide screen LED TV and a LAPTOP ?
I bet they may even be less expensive
than those drum recorders ?
Capillary action sounds like the
trees use to pick up water from their roots
???
I think the pumping is really caused by
the outflow (EVAPORATION OR ? MOVING PAPER)
pulling up on the reservoir
as the ink goes to the paper.
The capillary action only keeps
the ink in the tube and little more.
INTERESTING, never thought of this before.
You guys need to study plant roots & Leaves
to understand your own equipment.
----- Original Message ----- From: "Jan Froom" =
To:
Sent: Tuesday, October 27, 2009 1:52 PM
Subject: Re: TELEDYNE-GEOTECH HELICORDER Ink Pen
You want capillary attraction to pull the ink out of the ink =
reservoir, so you have to have the top of the ink in the reservoir below =
the pen level, otherwise the ink will siphon causing a very wide inky =
trace. =20
I use a simple plastic one oz bottle which I've placed two brass =
tubes in the lid, one going to the bottom of the
bottle and one just though the top for a air vent. The one going =
to the bottom of the bottle is then connected to the pen using
neoprene tubing. To get the whole thing going... I put my finger =
over the air vent tube, squeeze the bottle until ink comes out
the pen, then remove my finger from the air vent, and release the =
squeeze on the bottle.
The pen opening must be _*EXACTLY*_ tangent to the face of the =
drum... I installed the pen... and then put a very fine sand
paper on the drum surface and sanded the pen to get that tangent =
fit.
Getting the pen to pull ink was the hardest part of my =
installation and
I probably spent more time getting the pen to work... than =
anything else. Having George Bush & Steve Hammond available for =
suggestions and support was the only way I got mine going.
Another interesting point is the force at which the pen makes =
contact with the paper...
our pens have a counter weight on a screw at the back end of the =
pen which can be adjusted to adjust the contact force.
Too light and pen will skip on a large rapid swings... too heavy =
and you've decreased your sensitivity.
I'm curious as to how many other "drummers" are out there?
Jan in Gilroy
Stephen Hammond wrote:
Hi, the ink will flow if the reservoir fluid level is above the =
pen. The trick is to keep it from flowing too much. I used a wire clamp =
on the tubing to cut the flow down. Professional models used low =
pressure pumps and an fin valve. If I can suggest, search online for =
"chart pen ink" and you will find the Recorder Charts Pens Company in =
Newhall CA. 800-758-0740. While they do not list your unit they have a =
large selection of professional pens, ink and paper. It might be worth a =
trip to the website or even a call to see what they can offer in the way =
of a solution.
Steve
=20
*From:* psn-l-request@.............. [ =
mailto:psn-l-request@............... *On Behalf Of *James Allen
*Sent:* Saturday, October 24, 2009 9:46 PM
*To:* psn-l@..............
*Subject:* Re: TELEDYNE-GEOTECH HELICORDER
=20
Steve Hammond
Is there need for a special reservoir to insert the capillary =
tubing into or will the ink start flowing by the action of the pen on =
the chart paper?
Thanks
James Allen
----- Original Message -----
*From:* Stephen Hammond < mailto:shammon1@.............>
*To:* psn-l@.............. < mailto:psn-l@..............>
*Sent:* Saturday, October 24, 2009 8:41 PM
*Subject:* RE: TELEDYNE-GEOTECH HELICORDER
=20
There is a typo. Not needs try needle... Steve
=20
*From:* psn-l-request@..............
< mailto:psn-l-request@..............>
[ mailto:psn-l-request@............... *On Behalf Of =
*Stephen Hammond
*Sent:* Saturday, October 24, 2009 8:38 PM
*To:* psn-l@.............. < mailto:psn-l@..............>
*Subject:* RE: TELEDYNE-GEOTECH HELICORDER
=20
For some time some PSN members were using hypodermic needs =
to
build ink pens. You simply grind the point off and have a
precession tip that can then be connected to the reservoir =
using
a capillary feed tube. We learned the process from Howard =
who used
this design back in the first Bay area seismic station way =
before
our time in the 40's. I ran two drum recorders back around =
1990
and Jan Froom currently has a display station at Bonfante =
Gardens
in Gilroy CA that has a permanent display he put together =
for
them also using this design.
Regards, Steve Hammond PSN Aptos, CA
=20
=20
__________________________________________________________
Public Seismic Network Mailing List (PSN-L)
To leave this list email PSN-L-REQUEST@.............. with the body =
of the message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more information.
George Bush
Sea Ranch, CA, USA
38.73775N, 123.48882W=20
-------------------------------------------------------------------------=
-----
No virus found in this incoming message.
Checked by AVG - www.avg.com=20
Version: 8.5.423 / Virus Database: 270.14.40/2471 - Release Date: =
10/31/09 07:53:00
This is an interesting point. It would =
be very nice=20
to be alerted audibly when an event is actually being received =
(occurring)=20
in one of our data logging/analysis programs. I assume it's not =
that easy=20
to do because of the varying noise and event levels. =20
Ed.
With the drum recorder I am =
preserving a bit of=20
history and the drum is what impresses visitors. It is also my warning =
signal=20
as it sits in our living room and you can hear the pen skritching on =
the paper=20
when the quake comes in. To me, nothing beats the WOW-factor of =
watching a=20
world-class quake come in on a drum =
recorder.
George
At=20
07:36 AM 10/28/2009, you wrote:
For a lot less =
trouble why not=20
simply get
A wide screen LED TV and a LAPTOP ?
I bet they =
may even=20
be less expensive
than those drum recorders ?
Capillary =
action=20
sounds like the
trees use to pick up water from their =
roots
???
I=20
think the pumping is really caused by
the outflow (EVAPORATION OR =
?=20
MOVING PAPER)
pulling up on the reservoir
as the ink goes to =
the=20
paper.
The capillary action only keeps
the ink in the tube and =
little=20
more.
INTERESTING, never thought of this =
before.
You guys=20
need to study plant roots & Leaves
to understand your own=20
equipment.
----- Original Message ----- From: "Jan Froom" =
<JDarwin@.............>
To: =
<psn-l@..............>
Sent:=20
Tuesday, October 27, 2009 1:52 PM
Subject: Re: TELEDYNE-GEOTECH=20
HELICORDER Ink Pen
You want capillary =
attraction=20
to pull the ink out of the ink reservoir, so you have to have the =
top of=20
the ink in the reservoir below the pen level, otherwise the ink =
will=20
siphon causing a very wide inky trace.
I use a simple =
plastic=20
one oz bottle which I've placed two brass tubes in the lid, one =
going to=20
the bottom of the
bottle and one just though the top for a air =
vent.=20
The one going to the bottom of the bottle is then connected to the =
pen=20
using
neoprene tubing. To get the whole thing going... I put my =
finger=20
over the air vent tube, squeeze the bottle until ink comes =
out
the pen,=20
then remove my finger from the air vent, and release the squeeze =
on the=20
bottle.
The pen opening must be _*EXACTLY*_ tangent to the face =
of the=20
drum... I installed the pen... and then put a very fine =
sand
paper on=20
the drum surface and sanded the pen to get that tangent =
fit.
Getting=20
the pen to pull ink was the hardest part of my installation =
and
I=20
probably spent more time getting the pen to work... than anything =
else.=20
Having George Bush & Steve Hammond available for suggestions =
and=20
support was the only way I got mine going.
Another interesting =
point is=20
the force at which the pen makes contact with the paper...
our =
pens=20
have a counter weight on a screw at the back end of the pen which =
can be=20
adjusted to adjust the contact force.
Too light and pen will =
skip on a=20
large rapid swings... too heavy and you've decreased your=20
sensitivity.
I'm curious as to how many other "drummers" are =
out=20
there?
Jan in Gilroy
Stephen Hammond wrote:
Hi, the ink =
will flow if=20
the reservoir fluid level is above the pen. The trick is to keep =
it from=20
flowing too much. I used a wire clamp on the tubing to cut the =
flow=20
down. Professional models used low pressure pumps and an fin =
valve. If I=20
can suggest, search online for "chart pen ink" and you will find =
the=20
Recorder Charts Pens Company in Newhall CA. 800-758-0740. While =
they do=20
not list your unit they have a large selection of professional =
pens, ink=20
and paper. It might be worth a trip to the website or even a =
call to see=20
what they can offer in the way of a=20
solution.
Steve
*From:*=20
psn-l-request@.............. [ =
mailto:psn-l-request@..............] *On Behalf Of *James=20
Allen
*Sent:* Saturday, October 24, 2009 9:46 PM
*To:*=20
psn-l@..............
*Subject:* Re: TELEDYNE-GEOTECH=20
HELICORDER
Steve Hammond
Is there =
need for a=20
special reservoir to insert the capillary tubing into or will =
the ink=20
start flowing by the action of the pen on the chart=20
paper?
Thanks
James =
Allen
-----=20
Original Message -----
*From:* Stephen =
Hammond=20
<=20
mailto:shammon1@.............>
=
*To:*=20
psn-l@.............. <=20
mailto:psn-l@..............>
=
*Sent:*=20
Saturday, October 24, 2009 8:41 PM
=
*Subject:*=20
RE: TELEDYNE-GEOTECH HELICORDER
=20
There is a typo. Not needs try =
needle...=20
Steve
=
*From:*=20
psn-l-request@..............
< =
=
mailto:psn-l-request@..............>
[ =
mailto:psn-l-request@..............] *On Behalf Of *Stephen=20
Hammond
*Sent:* Saturday, October 24, 2009 =
8:38=20
PM
*To:* psn-l@.............. <=20
mailto:psn-l@..............>
=
*Subject:* RE:=20
TELEDYNE-GEOTECH HELICORDER
=20
For some time some PSN members were =
using=20
hypodermic needs to
build ink pens. You =
simply=20
grind the point off and have a
precession =
tip=20
that can then be connected to the reservoir=20
using
a capillary feed tube. We learned =
the=20
process from Howard who used
this design =
back in=20
the first Bay area seismic station way =
before
our=20
time in the 40's. I ran two drum recorders back around=20
1990
and Jan Froom currently has a display =
station=20
at Bonfante Gardens
in Gilroy CA =
that has a=20
permanent display he put together for
them =
also=20
using this design.
Regards, Steve =
Hammond PSN=20
Aptos, CA
=20
=20
=
___________________________________________=
_______________
Public=20
Seismic Network Mailing List (PSN-L)
To leave this list email =
PSN-L-REQUEST@.............. with the body of the message (first =
line only):=20
unsubscribe
See http://www.seismicnet.com/maillist.html for =
more=20
information.
George Bush
Sea Ranch, CA, USA
38.73775N, =
123.48882W=20
No virus found in this incoming message.
Checked by AVG =
-=20
www.avg.com
Version: 8.5.423 / Virus Database: 270.14.40/2471 - =
Release=20
Date: 10/31/09 07:53:00