<![CDATA[SoliForum - 3D Printing Community — Simpler, cheaper delta]]> https://www.soliforum.com/topic/4853/simpler-cheaper-delta/ Fri, 24 Jan 2014 21:24:04 +0000 PunBB <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/47639/#p47639 I got an extra Printrboard clone I plan to use for this myself. At the moment, I have an estimated build cost of $250 for this design. I will post a project when I get further done.

]]> Fri, 24 Jan 2014 21:24:04 +0000 https://www.soliforum.com/post/47639/#p47639 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/47615/#p47615 thats a very precise answer! thanks that could be a neat build indeed. panucatt devices finally said they would exchange my board for a new one so ill have an extra board... gonna need to put it to use somehow smile

]]> Fri, 24 Jan 2014 15:11:00 +0000 https://www.soliforum.com/post/47615/#p47615 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/47161/#p47161 Well, from the original thread if you look on page 4 there is a description of the build volume. Nicholas shows a 200mm diameter circle that can fit into the odd shaped build area. This is up for debate in my mind. The arms should not ever reach complete vertical or horizontal angles. On a standard Rostock/delta, the arms are the only vectors that move, and hence the shoulder and end-effector offsets do not come into play with the X-Y area. But on this LISA design, the end-effector and shoulder offsets move and stay in line with the arms, thus increasing the reach. Until one is built, I would rather say the minimum diameter is 180mm.

As for Z, I plan to get 600mm hardnened shafts (24") that once you remove the 200mm for the arm, 20mm for the shoulder, roughly 15mm for the end effector and another 25mm  for getting an endstop switch and about 25mm for endplate mounting, that leaves 315mm possible height. Depending on your hot-end and heatbed will take away from this.

Edit: I have a different shoulder dimension than the original LISA. So I whipped up the numbers with the original column spacing. That is the first picture. In the second picture, I maximized the column spacing to get the 200mm diameter with what I am working on. That is picture 2. The weird shape in the middle is the actual build area. If the arm is fully upright/vertical, the hotend would be at 80mm radius from the column. If the arm is fully extended/horizontal, the hotend would be 280mm radius from the column. Cross section each column and you get that weird shape.

]]> Sun, 19 Jan 2014 13:32:28 +0000 https://www.soliforum.com/post/47161/#p47161 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/47152/#p47152 neato ive been thinking alot about deltas lately, whats the build volume on that ?

]]> Sun, 19 Jan 2014 05:24:59 +0000 https://www.soliforum.com/post/47152/#p47152 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/47121/#p47121 I have been planning a mod of this. I like the majority of it being printed parts and inexpensive bearings. The original thread on reprap they are using expensive threaded rods though. I have redrawn this to use his hub, but changed the shoulders to use bronze sleeve bearings and thrust bearings. The parts can be purchased from McMaster Carr for $21 a column (24" shaft and bearings). Considering the rods they are using cost $65 a column, this is a considerable savings. I plan to drive this using fishing line. I have 2 goals: Cheap and easy to assemble. When I get further finished the base, motor mounts, and line pulleys, I will post more details in the projects section.

]]> Sat, 18 Jan 2014 17:58:04 +0000 https://www.soliforum.com/post/47121/#p47121 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/46569/#p46569 3dcad wrote:
2n2r5 wrote:

Yep, that's what I was looking to do.

can you post some pictures of what you have made? That would be great.


This project is still very high on my list of things I want to do. I have been swamped lately thought with that activity that pays the bills. I really hope to get some time for this later this month.

]]> Mon, 13 Jan 2014 01:15:23 +0000 https://www.soliforum.com/post/46569/#p46569 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/46556/#p46556 2n2r5 wrote:

Yep, that's what I was looking to do.

can you post some pictures of what you have made? That would be great.

]]> Mon, 13 Jan 2014 00:28:17 +0000 https://www.soliforum.com/post/46556/#p46556 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44344/#p44344 This looks awesome!  What version of Marlin or other firmware would you use for this?  Would you design your own printed parts or is there a link with STLs somewhere to the components in this video?  I reviewed the link on the reprap forum and noted that some kinematic calculation mods may be required if the print area is altered.  Being new to 3D printing and electronics in general I get the feeling that I may be out of my depth with this project, but would like to be able to tackle it some day (apologies for any stupid questions that may have been asked already).

]]> Sat, 14 Dec 2013 18:52:30 +0000 https://www.soliforum.com/post/44344/#p44344 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44256/#p44256 I thought there was a problem with repeat-ability with the threadless ball screw (as in 3 of them would have 3 different rates from the same STL).

What about the possibility that instead of using horixontal force with the bearing design, you print something more like the gravity screw toy so that the bearings ride down the screw like a spiral ramp so that the force is downward instead?

I will hve to draw something up to show what I mean.

EDIT: Done

]]> Fri, 13 Dec 2013 21:44:31 +0000 https://www.soliforum.com/post/44256/#p44256 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44249/#p44249 IanJohnson wrote:

Imagine using threadless ballscrews with that.  Replace $50 of threaded rod with printed parts and 625 bearings.  You still have to spend for electronics, steppers, and hotend, but beyond that it's nickles and dimes.


thats what i posted on the reprap pg tongue

]]> Fri, 13 Dec 2013 20:37:39 +0000 https://www.soliforum.com/post/44249/#p44249 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44247/#p44247 Yep, that's what I was looking to do.

]]> Fri, 13 Dec 2013 20:23:34 +0000 https://www.soliforum.com/post/44247/#p44247 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44244/#p44244 Would you try the double carriage?  According to comments at Thingiverse having two back to back solves the problem of assymmetric steps/mm.

]]> Fri, 13 Dec 2013 19:56:33 +0000 https://www.soliforum.com/post/44244/#p44244 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44240/#p44240 I'm already thinking about how to redesign the threadless to work with this. I will plan on making a trip to the hardware store to pick up anything I might be missing. I think I have most of what I need. Might just need a little more all thread.

]]> Fri, 13 Dec 2013 19:39:25 +0000 https://www.soliforum.com/post/44240/#p44240 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44231/#p44231 Imagine using threadless ballscrews with that.  Replace $50 of threaded rod with printed parts and 625 bearings.  You still have to spend for electronics, steppers, and hotend, but beyond that it's nickles and dimes.

]]> Fri, 13 Dec 2013 18:19:48 +0000 https://www.soliforum.com/post/44231/#p44231 <![CDATA[Re: Simpler, cheaper delta]]> https://www.soliforum.com/post/44158/#p44158 Here's the development thread - http://forums.reprap.org/read.php?178,267835

]]> Fri, 13 Dec 2013 00:45:45 +0000 https://www.soliforum.com/post/44158/#p44158