----- Original Message -----
Sent: Wednesday, February
08, 2006 5:34 AM
Subject: RE:
[PSUBS-MAILIST] link
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