Re: (ET) Attachments

["Robert" <euclid delhitel net>]

I have several additions (I don't think they classify as attachments) to the 
ET that I'm going to implement. One of the things designed is an electronic 
tachometer with re mote sensing. I'm going to update and use it to monitor 
engine rpms. With a little tweaking I will be able to add a mph gauge to my 
ET.
Pieter, I laughed when you said you were going down to the basement, Nancy 
calls the basement the Robsonian!

Rob

-----Original Message----- 
From: elec-trak-request cosmos phy tufts edu
Sent: Wednesday, January 09, 2013 4:33 PM
To: elec-trak cosmos phy tufts edu
Subject: Elec-trak Digest, Vol 11, Issue 16

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Today's Topics:

  1.  A New Elec-Trak Accessory Idea ? (RJ Kanary)
  2. Re:  A New Elec-Trak Accessory Idea ? (Pieter Litchfield)


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Message: 1
Date: Wed, 09 Jan 2013 15:06:08 -0500
From: RJ Kanary <rjkanary consolidated net>
To: et <Elec-trak cosmos phy tufts edu>
Subject: (ET) A New Elec-Trak Accessory Idea ?
Message-ID: <50EDCDB0 5000901 consolidated net>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"

http://www.youtube.com/watch_popup?v=tPg1ZMiC9pA



RJ





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Message: 2
Date: Wed, 9 Jan 2013 16:33:16 -0500
From: "Pieter Litchfield" <pieter_litch yahoo com>
To: "'RJ Kanary'" <rjkanary consolidated net>, "'et'"
<Elec-trak cosmos phy tufts edu>
Subject: Re: (ET) A New Elec-Trak Accessory Idea ?
Message-ID: <010701cdeeb0$f04d6070$d0e82150$@com>
Content-Type: text/plain; charset="us-ascii"

well I gotta admit I have robo-envy!  It looks very cool, but I wonder 
about
how it would handle an 18 inch snowfall.  Sometimes size is an issue and
when pushing deep heavy snow into a bank, it's all about size.  Sometimes I
have to get out the JD350 crawler.....

One thing I found interesting was the use of pneumatics for plow controls.
My ET bucket loader is hydraulic/electric.  It inefficient in the extreme
because the battery driven hydraulic pump is pressurizing a circuit even if
you are not using the controls.  I would assume the robo-plow has a
compressor charging an air pressure reservoir.  Why not just use electric
actuators?   If I were designing an ET bucket loader from scratch, I'd
probably try to use 36 volt very heavy duty electric actuators instead of
the hydraulic/electrics in the original ET bucket loader design.  It might
be slower, but I'm sure it would be kinder to the power supply too.  One
drawback I see is trying to keep actuators on opposite sides of the loader
frame "synched" so that one actuator doesn't  run a little faster that the
other and jam the whole thing up.  I guess that using stepping motors on 
the
actuators and counting revolutions with a little digital controller could
solve that.

Another use for actuators would be to raise a plow.  I have a plow on my 
ATV
which is cable winch raised, similar to the plow on an ET.  You can't do
down pressure on a cable plow - it's all gravity.  I am thinking (for the
ATV anyway) that I will use an actuator that can be easily clamped to the
front rack of the ATV and give my both down and up pressure.  Same thing
could be done to substitute for the winch on the ET.

Off to the basement to check the inventory!

From: RJ Kanary [mailto:rjkanary consolidated net]
Sent: Wednesday, January 09, 2013 3:06 PM
To: et
Subject: (ET) A New Elec-Trak Accessory Idea ?




http://www.youtube.com/watch_popup?v=tPg1ZMiC9pA


RJ




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