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1
3D Models / PI tray
« Last post by jinx on October 14, 2017, 07:19:30 AM »
       

 A pi tray mk1... after hacking up my desk ran out of a safe place for my PI so made a tray that bolted/glued where ever I liked.
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this model rather wasteful on supports but its the easiest way for a two colour look.
 best result print at .3 layer height and gave it a 24% infill..
                                                             have fun.
  wanna make your own tray, use this pi3 as a template https://www.thingiverse.com/thing:2035004 its a nice quick loading model into sketckup.
   
2
Stationary / 24byj48 based delta robot - fail
« Last post by mogul on October 08, 2017, 02:24:55 AM »
I made this small delta robot.
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It is fast as should be


But after the first few movements it is obvious that the cheap 24byj48 motors have way too much play. At some positions where center of gravity is right (bad), the end effector's position is floating more than 10mm in a random direction.

Not sure if it really make sense to continue down this path.
3
Everything else / Re: My scope focuser upgrade
« Last post by jscottb on October 07, 2017, 07:57:43 PM »
Well, my plans have changed... The "person" I won the 6" scope from was a twerp and wanted 140$US more for shipping after waiting four full days with no communication  >:(

I found  a dealer with new 130mm Orion optics in a bad shipped scope. Says the optics are unharmed and are under warrantee for 60days. This is what I wanted to do kind of anyway, but new good optics where more costly than the other scope. It will come with other parts as well.

I plan to print a mirror cell (if needed) a box and a focuser/secondary mount and truss the two together with aluminum L beams or square tubing.

Here is a first draft of the focuser and spider asm. It will probably change after I get the optics in. I am thinking about splitting the part in half with the focuser mount on one side and the non-focuser side on the other. Have screw joint to put them together. Unsure for now.

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4
Everything else / Re: My scope focuser upgrade
« Last post by jscottb on October 06, 2017, 07:47:22 AM »
Thanks Jinx.

Usually you have some sort of tensioner on the knob assembly and roller. That;s what I am sorting out now.
 
5
Everything else / Re: My scope focuser upgrade
« Last post by jinx on October 06, 2017, 05:00:15 AM »
fine looking start Js, you using a roller for adjustment rather than a rack and pinion? just wondering where you lock it in place.
6
Everything else / Re: My scope focuser upgrade
« Last post by jscottb on October 05, 2017, 10:37:05 PM »
I have mad it a bit more organic.

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Looking next into tensioning points for the shafts and may use two bearings for more points of contact, but will try with one first. 
7
Everything else / My scope focuser upgrade
« Last post by jscottb on October 05, 2017, 06:53:55 PM »
I know a few here like visual astronomy as well as bots and 3d printing so here is my latest scope project.

It's the beginnings of a simple 2"/1.25" crayford style focuser. I also wanted a very low profile focuser that I could add or take rack length away at night during use. This is very useful with many larger mm ep's, 20mm and above.

It will be in four parts; The tube mount, the base, 2" focus rack and 1.25" ep adapter.

There will be one bearing on the base and one roller on the knob assembly with rubber o-rings to move the rack up and down and keep presser on it. I may opt to use some teflon in the tube and rack for smoother movement. I may just smooth sand the tube and rack and test the movement first.  Still a lot of holes and work to add :)

Here are a few images and a test print of the base.

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8
3D Printers / Re: 3Dimsen
« Last post by viswesh on September 26, 2017, 01:17:04 PM »
nice machine sir.
9
3D Printers / Re: 3Dimsen
« Last post by Bajdi on September 26, 2017, 05:42:36 AM »
Nice machine :) Deity is right, best design/print a nice fan duct to direct the fan on to the part. I also always wrap my heater block with kapton tape. Helps keep the temperature more stable.
10
3D Printers / Re: 3Dimsen
« Last post by Deity on September 25, 2017, 07:49:30 AM »
HELLO 3Dimsen!

Hi to you too moglusa!

I see you managed to find a way to include your signature ice cream sticks on 3Dimsen :p

Also, you might want to get a duct for the (print) cooling fan because as it is now it seems that the airflow will go right the extruder heating element

All in all \o/
Pages: [1] 2 3 ... 10

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* Recent Topics

PI tray by jinx
[October 14, 2017, 07:19:30 AM]


24byj48 based delta robot - fail by mogul
[October 08, 2017, 02:24:55 AM]


My scope focuser upgrade by jscottb
[October 07, 2017, 07:57:43 PM]


3Dimsen by viswesh
[September 26, 2017, 01:17:04 PM]


Antique (fun) stuff by MEgg
[September 23, 2017, 09:26:34 AM]


win a smoothie board by jinx
[September 21, 2017, 02:21:45 AM]


Parallax CR Servo with Built-In Encoder by erco
[September 19, 2017, 10:50:01 PM]


Re-writing robotics by MEgg
[September 17, 2017, 06:01:03 AM]


Saturn pics anyone by ossipee
[September 16, 2017, 05:46:24 PM]


Kitronik :MOVE mini buggy kit by craighissett
[September 14, 2017, 08:12:20 PM]


Third 3D printer recommentation by Deity
[September 14, 2017, 06:43:00 AM]


Android Adware by Impala
[September 13, 2017, 03:24:01 PM]


Plantoid Robot's on Kickstarter. by ossipee
[September 09, 2017, 04:29:54 PM]


rewound PLA filament by jinx
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corexy test by jinx
[September 02, 2017, 05:30:46 AM]

* Recent Posts

PI tray by jinx
[October 14, 2017, 07:19:30 AM]


24byj48 based delta robot - fail by mogul
[October 08, 2017, 02:24:55 AM]


Re: My scope focuser upgrade by jscottb
[October 07, 2017, 07:57:43 PM]


Re: My scope focuser upgrade by jscottb
[October 06, 2017, 07:47:22 AM]


Re: My scope focuser upgrade by jinx
[October 06, 2017, 05:00:15 AM]


Re: My scope focuser upgrade by jscottb
[October 05, 2017, 10:37:05 PM]


My scope focuser upgrade by jscottb
[October 05, 2017, 06:53:55 PM]


Re: 3Dimsen by viswesh
[September 26, 2017, 01:17:04 PM]


Re: 3Dimsen by Bajdi
[September 26, 2017, 05:42:36 AM]


Re: 3Dimsen by Deity
[September 25, 2017, 07:49:30 AM]


Antique (fun) stuff by MEgg
[September 23, 2017, 09:26:34 AM]


3Dimsen by mogul
[September 23, 2017, 08:59:05 AM]


win a smoothie board by jinx
[September 21, 2017, 02:21:45 AM]


Parallax CR Servo with Built-In Encoder by erco
[September 19, 2017, 10:50:01 PM]


Re: Re-writing robotics by MEgg
[September 17, 2017, 06:01:03 AM]