[PSUBS-MAILIST] electric manipulator

[Rick Patton via Personal_Submersibles]

Sounds good. Take lots of pictures!
Rick

On Sun, Nov 12, 2017 at 1:36 PM hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Rick,
> My vertical lathe is sitting on a solid foundation now, I had to excavate
> 4 feet down and pour a concrete column up from virgin ground to support the
> Lathe.  I had to extend the front of the shop also, I don't know what I was
> thinking ;-)  I have not gone further with the UT of the welds.  I am
> focusing my efforts on Gamma and my renovation project.  No need to pay for
> a manipulator, I will be happy to let you copy it  if it works out.
> Hank
>
> On Sunday, November 12, 2017, 4:02:15 PM MST, Rick Patton via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hank
> Simple is good. looking forward to following this as I might be paying you
> to build me one if it works out well. Did you ever locate any one to UT
> your welds yet and did you get your floor fixed from the weight of that
> giant milling machine?
> Rick
>
>
> On Sun, Nov 12, 2017 at 10:49 AM hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Rick, you can use sea water in an aluminum or composite  cylinder  if you
> use a water pump for generating the pressure.  There are water pressure
> manipulators out there.  I am building a full electric manipulator to
> reduce weight and I think it will be much simpler than a hydraulic
> manipulator.
> Hank
>
> On Sunday, November 12, 2017, 11:34:23 AM MST, Rick Patton via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hank,
> I was told that I could use the power tilt rams for an outboard motor on a
> manipulator and replace the oil with salt water but have not pursued it
> further as that project is still a ways away.
> Rick
>
> On Sun, Nov 12, 2017 at 1:36 AM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi All,
> The electric manipulator project is on hold because I am not happy with
> the home built actuators.  I made two, one is linear and the other is
> rotary.  They work just fine but are under powered.  I thought I could
> compensate for the low power by spring loading the members.  This helps a
> lot, but in testing I find it inadequate.  I bought a trim tab  actuator
> that is fully submersible that I can experiment with.  I hope to simply
> remove one o-ring from the shaft and air compensate it.  One nice feature
> is the screw system requires no limit switches.  The actuator is cheaper to
> buy than build from scratch.  Luckily the new actuator is the same size as
> what I built, so they will fit the manipulator.
> Hank
>
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