Hi
Bill,
I recently fitted a
curtis PWM 24v dc speed controller and an NPC robot motor to an old farallon
dpv. The speed control potentiometer is operated by a control knob on a
stainless steel shaft sealed and using 2 ?o? rings. So far
the machine has been used down to a depth > 100m. The only problem so
far is the knob is stiff to operate at depth.
David
Paget
-----Original
Message-----
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Akins
Sent: Tuesday,
7 February 2006 4:03
PM
To:
personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST]
link
Thanks again for thinking of me
Steve. But it wouldn't help it to stay dry even if it was inside my sub. My
sub is a completely wetsub that I use scuba gear
to operate. No dry cockpit in my
boat. It wouldn't be practical for me to install it in a pod outside the sub
when I need it in the cockpit. It's not locating the
electronics
that is the problem. I can and
have found them at many sites. All kinds of circuit boards to operate a DC
variable speed motor. Just none of
them I have found thus far are
already waterproof and pressureproof with an exposed to the water switch knob,
handle or twistgrip. For my
application I don't need a fancy
circuit board. I am using between the voltage spectrum of 12 volts for
half speed and 24 volts for full speed.
Since a household rotary light
dimmer switch is made to handle 115 volts, it will more than handle my max of
24 volts. So you see I don't
need a circuit board. If I wanted
to make the switch myself, it would be simplest and cheapest to just use
the rotary dimmer switch and
encase it in pvc and use a magnet
to actuate it without using a circuit board for the switch at all. The problem
is then installing the dimmer
switch in pvc to water and
pressure proof it and then to make a magnet actuate the shaft to the switch. I
could probably do it by taking the
time and trouble to experiment but
it would just be so much easier to be able to buy one like I need. If I can
find it.
----- Original Message -----
Sent:
Monday, February 06,
2006 6:22
PM
Subject: RE:
[PSUBS-MAILIST] link
considering they
make them for land vehicles, i'm not suprised!
surely
it would be contained within the sub or a custom pod
outside?
-----Original
Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Akins
Sent: 06 February
2006 23:33
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST]
link
Thanks for the links
Steve.
However I didn't see any
waterproof and pressureproof variable speed motor controllers ready made
at the sites.
----- Original
Message -----
Sent:
Saturday, February 04,
2006 6:37
PM
Subject:
[PSUBS-MAILIST] link
just in case
it's useful to anyone...
www.4qd.co.uk
make electric
vehicle speed controllers and have a sister site www.4qdtec.com withlots of good
info.
pay the small
subscription fee its worth it!
steve