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Thanks Stewart,
I had a look at hydraulics, but it took up too much
space & was a bit costly.
The electric window motor I have, I won on auction
for $1-. I have a position
sensor made up, its the only thing on my projects
page.
Also I have 20 functions on the PS2, so may as well
keep all the operations on that.
Regards Alan
----- Original Message -----
Sent: Sunday, March 27, 2011 2:32
AM
Subject: RE: [PSUBS-MAILIST] Fixed motors
versus rotating
That
reduction is a ?worm drive? gearbox?. Combine that with an encoder of some
kind for position sensing? and you have a complete system there? you could use
servo or stepper motors etc.. or even just a brushed motor with limit
switch?s? with depth comes pressure problems which is why people turn to
hydraulics! J
you could always rig a 12/24dc hydraulic pump to rams/hydraulic
motors/gears/worm drive to give you the movement you need at
depth?.
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Alan
James
Sent: Saturday, 26 March 2011 1:53 PM
To:
personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Fixed
motors versus rotating
That's
not a bad idea Jim,
Looking
at the size of the motors in my linear actuators, I would
only
need
something that size to get the same speed of rotation.
I'm
controlling everything off a Play station 2 controller, & the input output
converter board has
pulse
width modulation for the x & y axis on both joysticks. This means I
already have speed
....
I just ran a car window motor off my system & works brilliantly &
already has the reduction gearing.
Might
be on to a winner thanks.
-----
Original Message -----
Sent:
Saturday, March 26, 2011 3:19 PM
Subject:
Re: [PSUBS-MAILIST] Fixed motors versus rotating
If
you're trying to avoid having a rotating shaft penetrate the hull, one
solution you might consider is using a small motor sealed with a worm
gear to rotate the thruster motor. That can give you as
many degrees of rotation as you want. It's very compact, has plenty of
torque, and operates smoothly.
Sorry
mistake, should have said
"intended
to have them rotating through 180 degrees to give me both forward
& vertical
movement."
-----
Original Message -----
Sent:
Saturday, March 26, 2011 1:32 PM
Subject:
[PSUBS-MAILIST] Fixed motors versus rotating
I
have 2 motors that are going to be mounted port & starboard, &
had intended to
have
them rotating through 180 degrees to give me both forward & lateral
movement.
I
have two linear actuators (electric rams) that I was going to use to
achieve this; however a direct linkage from the
actuator
piston
to a disk or lever on the motor rotating shaft won't give me 180
degrees. I would have to use some sort of
gearing,
This
all is seeming a bit hard & I'm tempted to buy 2 more
motors & dedicate them to the lateral
movement.
So
I would have 4 fixed motors.
I
don't want to rotate them using "through
hulls"
Any
words of wisdom on either how to set the motors up to rotate 180
degrees or on the pros & cons of fixed or
rotating
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