Non Cyclone - DLP idea

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Kobus du Toit

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Mar 30, 2014, 4:14:45 AM3/30/14
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I like asking you guys rather than on the DLP forums

So I have this wiper blade going across the build platform.  What I have learnt so far is the build platform needs to be under the fluid before I start and then I just need to do some filling up.  I am thinking of getting a fluid pump to empty the overflows into the main container before every print.  I will probably need to use one of the controllers for this at some point

Now the problem I have with the blade is it is the age old FDM machine leveling problem.  The blade needs to be exactly level with the build platform, but I don't want the user to do anything.  I was thinking there needs to be a spring on each side pulling the blade down, ofcourse there will be a stopper so that the blade doesn't fall out.

Before the print starts the build platform moves down to Z0 and then up to Z78.  As the build plate moves up it will push up against the blade.  The blade will move up and it will then be level with the build platform.  When the print starts something needs to lock the blade into place automatically.  What can I use for this kind of lock?  I can only think of an electromagnet.  Currently I only have a Sanguinololu, but I will probably move to a board with more capabilities so that I can handle everything I want to do.  I want to use the extruder controller for something else.  X, Y, Z are all in use already.  I need to get one fan onto the controller and one on the casing.  So probably already don't have any open slots


Martin Zabojnik

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Mar 30, 2014, 4:42:30 AM3/30/14
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Hi
Make some foto .
Maybe use micro servo ?

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Kobus du Toit

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Mar 30, 2014, 5:44:09 AM3/30/14
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How would you use the micro servo?  Do you have photos somewhere that people have done some kind of clamp with a servo?


Build plate at Z78 and wiper against build plate.  Overflows can also be seen.

Current wiper bracket.  I will redesign this so that springs pull the blade down and then the build plate will push it back up.  Just need a lock for it

Printed this so far

I need to develop something to allow me to center the Z ballscrew perfectly, have an idea for that. That should solve the waves you can see on the tower

Sorry camera can't take closer photos.  60 micron Z, 80 micron X/Y.  Build time 1 hour.  Makerbot 2X build time 3 hours at same layer height.  I am not even at full power yet :)  I believe it will come down to 15 minutes when I am done with everything

Samuel Kranz

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Mar 30, 2014, 6:28:29 AM3/30/14
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wow  nice, Im impressed

Kobus du Toit

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Mar 30, 2014, 6:39:02 AM3/30/14
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Thank you :)


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Martin Zabojnik

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Mar 30, 2014, 7:18:34 AM3/30/14
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Wow !!! Nice job !

Dne 30.3.2014 11:44 "Kobus du Toit" <kobus...@gmail.com> napsal(a):
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Iceflow

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Mar 30, 2014, 2:54:10 PM3/30/14
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Why do you need the wiper? the dlps i already see dont use any wipe, the resin remains in the tray from print to print, maybe i dont get the whole thing... :P


Kobus du Toit

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Mar 30, 2014, 3:49:13 PM3/30/14
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Because I move 6mm down after a print to flood the build area and then up to the correct layer height. That causes a bulge of fluid on top of the print. The wiper removes the bulge so that you have a flat surface to print on or each layer will have rounded corners and the last layer might make your item look like an egg

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Carlos García

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Mar 30, 2014, 5:56:26 PM3/30/14
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Thanks for the explanation, the issue is clear now :)
I attach my suggestion, it uses a servo-motor. Maybe a micro-servo could have enough force as well as Martin said.

Hopefully the drawing is clear enough :P
Let me know what you think!


scraper.png
scraper.svg

Kobus du Toit

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Mar 30, 2014, 7:02:24 PM3/30/14
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Interesting idea.  What I can actually do is bend the side of the wiper so that it is parallel with the stepper/servo.  Then I have a flat area on each side.  I can have the threaded rod attach to the motor as in your picture and the rod then goes through the flat areas.  I can then place a nut on the rod and a clamp around the nut.  I then use the principle of the RepRap or Cyclone of turning the rod and the clamp will move.

I will see if I can do the design today

Something you guys will hopefully find funny.  I have been working on this since December.  I measured the projectors to be 220 x 265, but they are actually 265 x 220.  Imagine the issues :)


Carlos García

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Mar 30, 2014, 7:33:15 PM3/30/14
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That idea is much better! More simple and probably a better lock :P


Kobus du Toit

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Mar 30, 2014, 7:39:23 PM3/30/14
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The Cyclone is popping up everywhere :)

ais...@gmail.com

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Mar 24, 2015, 11:44:06 AM3/24/15
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Kobus, looks like you have solved all the problems you have, dont you?

http://3dprint.com/53286/gizmo-3d-printers-fastest/

Nice to see the video, its fantastic indeed!! ;)

Good luck with the machines and the campaign!! dont forget to send me a test unit ;) hehehehe

Carlos García

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Mar 24, 2015, 12:54:48 PM3/24/15
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Wao, saw it this morning, didn't realise it was your printer!
It is very cool indeed, congratulations Kobus and good luck!!! :D

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Daniel "yOPERO" Garrido

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Mar 24, 2015, 4:08:09 PM3/24/15
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Kudos to you Kobus!! the R&D is awesome and the Gizmetor software looks is going to be as good as the hardware.

On Tuesday, 24 March 2015 16:54:48 UTC, Carlos Garcia Saura wrote:
Wao, saw it this morning, didn't realise it was your printer!
It is very cool indeed, congratulations Kobus and good luck!!! :D
On Tue, Mar 24, 2015 at 3:44 PM, <ais...@gmail.com> wrote:
Kobus, looks like you have solved all the problems you have, dont you?

http://3dprint.com/53286/gizmo-3d-printers-fastest/

Nice to see the video, its fantastic indeed!! ;)

Good luck with the machines and the campaign!! dont forget to send me a test unit ;) hehehehe

El domingo, 30 de marzo de 2014, 10:14:45 (UTC+2), Kobus du Toit escribió:
I like asking you guys rather than on the DLP forums

So I have this wiper blade going across the build platform.  What I have learnt so far is the build platform needs to be under the fluid before I start and then I just need to do some filling up.  I am thinking of getting a fluid pump to empty the overflows into the main container before every print.  I will probably need to use one of the controllers for this at some point

Now the problem I have with the blade is it is the age old FDM machine leveling problem.  The blade needs to be exactly level with the build platform, but I don't want the user to do anything.  I was thinking there needs to be a spring on each side pulling the blade down, ofcourse there will be a stopper so that the blade doesn't fall out.

Before the print starts the build platform moves down to Z0 and then up to Z78.  As the build plate moves up it will push up against the blade.  The blade will move up and it will then be level with the build platform.  When the print starts something needs to lock the blade into place automatically.  What can I use for this kind of lock?  I can only think of an electromagnet.  Currently I only have a Sanguinololu, but I will probably move to a board with more capabilities so that I can handle everything I want to do.  I want to use the extruder controller for something else.  X, Y, Z are all in use already.  I need to get one fan onto the controller and one on the casing.  So probably already don't have any open slots


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Kobus du Toit

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Mar 24, 2015, 4:45:39 PM3/24/15
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Thank you guys for all your help.  If I didn't find Cyclone on the web I wouldn't have moved to this next step in my search for building something to create my laser skirmish guns.  I am still planning on building something in Gizmetor (control app) so that I can print PCB's and my dream is still to print a CNC machine :)

Kobus du Toit

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Mar 24, 2015, 4:53:23 PM3/24/15
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Many of my issues where to do with the design of the build plate arm.  It was almost a spring so it messed up alot of things.  The new design is better I think.  The next design will be even better that the beta machines will have, because the build plate arm will be able to move a little bit and then you can bolt it together so that way you can make sure the build plate is perfectly level with the platform

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