Re: LISA Simpson November 17, 2013 09:21PM |
Registered: 10 years ago Posts: 47 |
Re: LISA Simpson November 18, 2013 10:51AM |
Registered: 10 years ago Posts: 18 |
Re: LISA Simpson November 18, 2013 12:57PM |
Registered: 10 years ago Posts: 47 |
Re: LISA Simpson November 18, 2013 01:45PM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 18, 2013 01:53PM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 18, 2013 02:27PM |
Registered: 12 years ago Posts: 85 |
Re: LISA Simpson November 18, 2013 02:36PM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 18, 2013 03:17PM |
Registered: 12 years ago Posts: 85 |
Re: LISA Simpson November 18, 2013 04:43PM |
Registered: 10 years ago Posts: 219 |
Quote
Quazzer
@maboo - How rigid is your Rostock with strings on just two sides?
Re: LISA Simpson November 19, 2013 04:06AM |
Registered: 10 years ago Posts: 153 |
Re: LISA Simpson November 19, 2013 12:08PM |
Registered: 10 years ago Posts: 145 |
Re: LISA Simpson November 19, 2013 12:13PM |
Registered: 10 years ago Posts: 145 |
Re: LISA Simpson November 19, 2013 12:47PM |
Registered: 10 years ago Posts: 16 |
Quote
Guizmo
I fail to see how the arm bases can rotate. I see that the threaded rod would make them shift Z position, but they also need to free turn on their own Z axis, how do you achieve that?
Re: LISA Simpson November 19, 2013 01:32PM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 19, 2013 04:50PM |
Registered: 10 years ago Posts: 145 |
Quote
pjoyce42
Quote
Guizmo
I fail to see how the arm bases can rotate. I see that the threaded rod would make them shift Z position, but they also need to free turn on their own Z axis, how do you achieve that?
It looks like the arm rotation is achieved by simply having the tracking nuts rotate on the threaded rod. This should be effective, but the Z-shift associated with the XY rotation needs to be accounted for in the kinematics.
Additionally, without the supports, what would prevent the top plate from twisting when all three rods are rotated in the same direction?
Regarding the motor mounts, I would say that the most elegant solution is to make a set of leveling legs that have a motor sized opening in them, or take the pvc piping and extend it to below the base to cover the motors. Having the motors hidden inside the PVC would allow you to hide almost all the wiring, leaving you with only a power cord, and a data cord showing (if you were to hide the controller under the bed). Here is a mockup of what I am talking about in case it isn't clear.
Re: LISA Simpson November 19, 2013 09:49PM |
Registered: 10 years ago Posts: 47 |
Re: LISA Simpson November 20, 2013 10:58AM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 20, 2013 01:03PM |
Registered: 11 years ago Posts: 37 |
Re: LISA Simpson November 20, 2013 02:05PM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 20, 2013 06:22PM |
Registered: 11 years ago Posts: 1,049 |
Re: LISA Simpson November 20, 2013 06:49PM |
Registered: 11 years ago Posts: 979 |
Quote
cozmicray
Neat design.
So how many tons of tension will be necessary to straighten the leadscrews?
Are there thrust bearings or taper bearings at top and bottom?
This requires tension or very straight leadscrews?
Do they tension leadscrews at the factory to straighten them?
I don't understand how the nuts and fixtures on the leadscrew are prevented from rotation?
Does the geometry of the center spider make it manageable?
Re: LISA Simpson November 20, 2013 08:37PM |
Registered: 10 years ago Posts: 219 |
Re: LISA Simpson November 20, 2013 09:14PM |
Registered: 11 years ago Posts: 1,049 |
Re: LISA Simpson November 20, 2013 10:09PM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 21, 2013 12:42PM |
Registered: 11 years ago Posts: 1,049 |
Re: LISA Simpson November 21, 2013 12:58PM |
Registered: 11 years ago Posts: 979 |
Quote
cozmicray
Nick what printer are you using to make all your parts?
What kind of fill density, what polymer will you use on printed thread clamps?
Might this require nylon or polycarb?
Have you thought about heating up a blank thread clamp (No threads) -- then clamping around leadscrew.
You could heat up threaded rod then clamp (even with external clamp right at center)? Is this against the repRap rules?
Re: LISA Simpson November 22, 2013 03:00AM |
Registered: 11 years ago Posts: 979 |
Re: LISA Simpson November 23, 2013 09:33PM |
Registered: 10 years ago Posts: 47 |
Re: LISA Simpson November 24, 2013 02:56AM |
Registered: 10 years ago Posts: 1,381 |
Re: LISA Simpson November 24, 2013 03:13PM |
Registered: 10 years ago Posts: 41 |