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<div class="moz-cite-prefix">Full continuous rotation isn't that
complicated, other than one part which needs be machined with
O-ring grooves, oil channels and a shaft connection (taper, spline
or keyway). Use a small hydraulic motor connected to the end of
the arm, recessed into an outer slip ring. The motor can be
connected traditionally with hoses for supply and return. The
inner slip ring connects to the motor shaft and seals to the outer
slip ring with o-rings. For a wrist with only one function
downstream (jaw open and close), you'll need three O-rings,
creating two oil channels in between. If you need more
functions, just keep adding channels / o-rings. If you secure the
inner slip ring to the motor shaft with a nut, that central cavity
in the inner slip ring can become the cylinder that operates the
jaw - just drop a cap over it to seal it off from the motor shaft,
and install a piston and outer cap. Then plumbing the cylinder is
as simple as drilling a hole through the inner slip ring,
connecting each end of the cylinder cavity to its corresponding
oil channel on the outside.<br>
<br>
Sean<br>
<br>
<br>
On 2014-05-30 20:21, Alan James via Personal_Submersibles wrote:<br>
</div>
<blockquote
cite="mid:1401502905.97063.YahooMailNeo@web120903.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial,
Lucida Grande, sans-serif;font-size:10pt">
<div><span>All,</span></div>
<div style="color: rgb(0, 0, 0); font-size:
13.333333969116211px; font-family: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;
font-style: normal; background-color: transparent;"><span>would
this idea for rotating the gripper have merit. (</span><span
style="background-color: transparent;">See attachment.)</span></div>
<div style="color: rgb(0, 0, 0); font-size:
13.333333969116211px; font-family: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;
font-style: normal; background-color: transparent;"><span>It
is simple & can give 90 degrees + of rotation. (would
you need more?)</span></div>
<div style="color: rgb(0, 0, 0); font-size:
13.333333969116211px; font-family: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;
font-style: normal; background-color: transparent;"><span>The
piston pulls a bolt in a rod down an angled slot in a pipe,
turning the rod & gripper.</span></div>
<div style="color: rgb(0, 0, 0); font-size:
13.333333969116211px; font-family: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;
font-style: normal; background-color: transparent;"><span>Ignore
the gripper on the end, it's just for show & doesn't
have a closing mechanism.</span></div>
<div style="color: rgb(0, 0, 0); font-size:
13.333333969116211px; font-family: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;
font-style: normal; background-color: transparent;"><span>Alan</span></div>
<div><br>
</div>
<div style="font-family: HelveticaNeue, 'Helvetica Neue',
Helvetica, Arial, 'Lucida Grande', sans-serif; font-size:
10pt;">
<div style="font-family: HelveticaNeue, 'Helvetica Neue',
Helvetica, Arial, 'Lucida Grande', sans-serif; font-size:
12pt;">
<div dir="ltr">
<hr size="1"> <font face="Arial" size="2"> <b><span
style="font-weight:bold;">From:</span></b> swaters
via Personal_Submersibles
<a class="moz-txt-link-rfc2396E" href="mailto:personal_submersibles@psubs.org"><personal_submersibles@psubs.org></a><br>
<b><span style="font-weight: bold;">To:</span></b>
<a class="moz-txt-link-abbreviated" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br>
<b><span style="font-weight: bold;">Sent:</span></b>
Friday, May 30, 2014 12:36 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
[PSUBS-MAILIST] Manipulator arm<br>
</font> </div>
<div class="y_msg_container"><br>
<div id="yiv1310599478">
<div>
<div>
<div style="color:rgb(0, 0, 0);">Hank,</div>
<div>That would be great. So on a four function
would you have eight penetrations or four
penetrations? My goal is to make a good and not to
expensive (under $2000) manipulator arm for psub
members.</div>
<div><br>
</div>
<div>My address is:</div>
<div>Scott Waters</div>
<div>3213 Arnold Ave</div>
<div>Bldg 122</div>
<div>Salina, KS 67401</div>
<div><br>
</div>
<div>Thank you,</div>
<div>Scott Waters</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>
<div style="font-size:75%;color:#575757;">Sent from
my U.S. Cellular© Smartphone</div>
</div>
</div>
</div>
<br>
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