CAD CAM EDM DRO - Yahoo Group Archive

Re: A "simple" Hexapod project

on 2003-06-14 16:24:38 UTC
Those actuators sound good Dan, not sure what the envelope of
movement would be for 8" travel but it sounds like it would make a
mill proper. I however can't even afford those bargain prices let
alone the 6 servo drives.

I have been sketching and thinking more about what Carl said about
the loads on the actuators and perhaps I am making things difficult
for myself. I could use his actuator concept with say 10mm(rather
than 6) threaded rod for stiffness and work well within the possible
stroke of each actuator. That would cut the basic actuator
production time down a heck of a lot. Cut tube, add threaded Nylon
insert, make delrin support for end of the lead screw and that's
about it. Of course I ignore the stepper mounting and gimble
production but who's counting. Making the nut long and also the
screw support long will also help at longer extensions and higher
force.

Can anyone suggest a good source (genrally or specifically) of
steel/ali tubing with a fairly good internal bore? Perhaps 20mm ID.

Thinking more about set up and calibration, I suppose the first thing
would be to mount the table at 0,0 and flat on the bed without
spindle. Then each leg can be attached by jogging each motor (rather
than axis) in turn. Assuming gimble bearings and pins are precise
this will leave the legs at the correct starting lengths,
tension/compression is irrelevant as it should be neutral? Beyond
that point I start to get scared.

Carl, what is the best way to get started? Is it difficult to decide
basic dimensions once the envelope of movement is decided?

More reading to do

Graham

Discussion Thread

Graham Stabler 2003-06-13 07:47:41 UTC A "simple" Hexapod project ccq@x... 2003-06-13 09:06:26 UTC Re: [CAD_CAM_EDM_DRO] A "simple" Hexapod project Dan Mauch 2003-06-13 10:06:53 UTC RE: [CAD_CAM_EDM_DRO] A "simple" Hexapod project andyolney 2003-06-13 10:49:39 UTC Re: A "simple" Hexapod project Tom Benedict 2003-06-13 11:01:52 UTC Re: [CAD_CAM_EDM_DRO] A "simple" Hexapod project Greg Jackson 2003-06-13 11:23:27 UTC RE: [CAD_CAM_EDM_DRO] A "simple" Hexapod project rainnea 2003-06-13 13:47:57 UTC Re: A "simple" Hexapod project Paul 2003-06-13 13:54:33 UTC Re: [CAD_CAM_EDM_DRO] A "simple" Hexapod project Carl Mikkelsen 2003-06-13 15:05:54 UTC Re: [CAD_CAM_EDM_DRO] A "simple" Hexapod project Tom Benedict 2003-06-13 15:22:23 UTC Re: [CAD_CAM_EDM_DRO] A "simple" Hexapod project Graham Stabler 2003-06-14 00:51:38 UTC Re: A "simple" Hexapod project Stephan Kotzé 2003-06-14 01:12:17 UTC RE: A "simple" Hexapod project rainnea 2003-06-14 01:33:12 UTC Re: A "simple" Hexapod project Dan Mauch 2003-06-14 09:01:48 UTC RE: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project Dan Mauch 2003-06-14 09:33:53 UTC RE: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project Graham Stabler 2003-06-14 16:24:38 UTC Re: A "simple" Hexapod project Carl Mikkelsen 2003-06-15 10:02:46 UTC Re: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project - calibration Carl Mikkelsen 2003-06-15 10:54:46 UTC Re: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project - envelope Graham Stabler 2003-06-15 15:34:02 UTC Re: A "simple" Hexapod project - envelope Carl Mikkelsen 2003-06-15 20:07:42 UTC Re: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project - fear factor Carl Mikkelsen 2003-06-15 20:07:42 UTC Re: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project - fear factor Graham Stabler 2003-06-16 01:47:13 UTC Re: A "simple" Hexapod project - fear factor stephank97 2003-06-16 02:27:56 UTC Re: A "simple" Hexapod project - envelope Dan Mauch 2003-06-16 07:30:53 UTC RE: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project - envelope carl fair 2003-06-16 08:10:16 UTC please help with Bobcad to Cncpro Paul 2003-06-16 08:10:54 UTC Re: [CAD_CAM_EDM_DRO] Re: A "simple" Hexapod project - envelope vrsculptor 2003-06-16 13:53:41 UTC Re: A "simple" Hexapod project - Free toolpaths Graham Stabler 2003-06-17 11:48:33 UTC Re: A "simple" Hexapod project - Just made a tool path