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Author Topic: So ... 3d Printers....  (Read 28465 times)

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PL1

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Re: So ... 3d Printers....
« Reply #720 on: April 15, 2018, 12:45:50 am »
So did you screw right into the holes or did you have to tap them first?  I'm only asking because I've had mixed success in regards to screwing into pla without it splitting.... seems to depend upon the model greatly.
No need to drill/tap this model because the screw hole sizes are exactly the right size . . . at least for my printer and slicer settings.   ;)

- The machine screw holes (outer columns) just barely brush against the threads.

- The PCB screw holes (inner columns, top) even survived a test using a #6 sheet metal screw instead of a #4 -- the hole stretched, but did not crack.

- The PCB bottom screw hole (center through-hole, bottom) is slightly larger than the PCB screw holes to prevent the cracking that PBJ noticed in one of the v0.02 prints.

If you print the part and have problems with cracking:
- Change the related screw hole size variable(s) in lines 37-39 of the SCAD file
- Preview
- Render
- Output a custom STL

The consideration that some part designers overlook is that instead of removing a circular hole (green), the software removes an inscribed polygon.(blue)



The number of sides of that blue polygon is controlled by the variable "$fn=" -- the number of fragments used to render a full circle. (Line 41 of the SCAD file)

To produce a hole like the blue hexagon in the picture above, use "$fn=6".

For an octagon, use "$fn=8".

For a 180-sided polygon, use "$fn=180" -- I know it's overkill, but this is a small part so the render time is still reasonable.


Scott
« Last Edit: April 15, 2018, 12:52:21 am by PL1 »

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Re: So ... 3d Printers....
« Reply #721 on: April 15, 2018, 01:19:29 am »
Yeah I've ran into the polygon issue already with my 3d printing adventures.  I made a sort of hub to hold  a detachable star wars yoke for my racing rig and upon the first print I was disappointed to find I had wasted two hours printing a blocky mess that the neck of the yoke wouldn't plug into... cranked the poly count for the cylinder up to 180 and it was fine. 

HaRuMaN

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Re: So ... 3d Printers....
« Reply #722 on: April 15, 2018, 01:27:27 am »
Nice!

Locke141

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Re: So ... 3d Printers....
« Reply #723 on: April 15, 2018, 07:56:22 am »
I love this thread.

Just got a 3D printer at work, a mono price select V1. Its not for personal use but as Im going to be buying the ABS & PLA and I need to train the technology teacher on how to use it, I dont see whay I cant get some test prints from here.

PL1

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Re: So ... 3d Printers....
« Reply #724 on: May 16, 2018, 10:51:20 pm »
Here's a weird one.   :dizzy:

PBJ asked me to print this Bally drop target from thingiverse.

I loaded the STL into Cura and turned it on it's side to reduce the odds of layer separation breaking the spring loop.  (supports and raft enabled)



When I tried to print it . . . fail.   :banghead:
(I stopped it at around 75% and removed the raft and supports)



The loop part of the model was "negated" (solid center, no loop  :dizzy:) and a slot ran down the middle and cut into the semi-circle under the target.

Re-loaded the model into Cura and normal view looks OK, but layer view shows the "negated" loop and slot down the middle in place of the center ridge.



Can anyone duplicate this?

Is this a problem with the model or is it caused by the old version (IIIP-i3?) of Cura that came with my Monoprice Maker Select V2 printer? (Wanhao Duplicator i3 clone)


Scott

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Re: So ... 3d Printers....
« Reply #725 on: May 17, 2018, 03:23:26 am »
I am at work now but when I get home I will load this up in Simplfy3d and see if I get the same results.

Titchgamer

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Re: So ... 3d Printers....
« Reply #726 on: May 17, 2018, 05:26:29 am »
Here's a weird one.   :dizzy:

PBJ asked me to print this Bally drop target from thingiverse.

I loaded the STL into Cura and turned it on it's side to reduce the odds of layer separation breaking the spring loop.  (supports and raft enabled)



When I tried to print it . . . fail.   :banghead:
(I stopped it at around 75% and removed the raft and supports)



The loop part of the model was "negated" (solid center, no loop  :dizzy:) and a slot ran down the middle and cut into the semi-circle under the target.

Re-loaded the model into Cura and normal view looks OK, but layer view shows the "negated" loop and slot down the middle in place of the center ridge.



Can anyone duplicate this?

Is this a problem with the model or is it caused by the old version (IIIP-i3?) of Cura that came with my Monoprice Maker Select V2 printer? (Wanhao Duplicator i3 clone)


Scott

Its probably the model, Ive had this issue before where it was caused by un sealed edges.

If you load it into a editor you may be able to repair it.

05SRT4

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Re: So ... 3d Printers....
« Reply #727 on: May 17, 2018, 11:33:45 am »
Yeah the model has the same issue and a few other discrepancies when I load it in Simplfy3d.

05SRT4

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Re: So ... 3d Printers....
« Reply #728 on: May 17, 2018, 01:00:02 pm »
Try this one, I just traced everything from the original in fusion360. It fixed all the weird issues I saw but the circle was still filled in. I change some settings to get the hole to show up. Enabled single outline extrusion.

pbj

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Re: So ... 3d Printers....
« Reply #729 on: May 17, 2018, 02:08:53 pm »
Can you add some support to either side of the center ring?  That area was reinforced on the original parts.


PL1

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Re: So ... 3d Printers....
« Reply #730 on: May 17, 2018, 02:11:04 pm »
Try this one, I just traced everything from the original in fusion360. It fixed all the weird issues I saw but the circle was still filled in. I change some settings to get the hole to show up. Enabled single outline extrusion.
Thanks.   ;D

Normal and layer views are both good -- looks like a winner!   :applaud:   :notworthy:   :applaud:


Scott

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Re: So ... 3d Printers....
« Reply #731 on: May 17, 2018, 04:48:52 pm »
Can you add some support to either side of the center ring?  That area was reinforced on the original parts.



Done, now that I got it shaped out I can add whatever so get your requests in now.

pbj

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Re: So ... 3d Printers....
« Reply #732 on: May 17, 2018, 05:00:23 pm »
Yes... yes... good.... goooooood.

 :cheers:

PL1

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Re: So ... 3d Printers....
« Reply #733 on: May 17, 2018, 05:28:22 pm »
Just finished testing the Version 1 print.

By printing the model on it's side, the spring loop is strong enough to suspend and gently bounce a 5 lb. dumbbell with no problem.   ;D

Version 2 looks even stronger.   :applaud:

I'll print one on it's back and another on it's side to see how they compare.


Scott

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Re: So ... 3d Printers....
« Reply #734 on: May 18, 2018, 01:08:05 am »
The Version 2 flat and side prints came out great.

The spring loop on both is strong enough to suspend and gently bounce a 5 lb. dumbbell with no problem.   ;D
-----------
I probably should have asked this earlier, but which pinball machine are you repairing?

There are several versions of the Bally drop target.

The model we've been working with is a flat-top (a.k.a. tombstone) version with no spacer nub at the bottom.

The picture you posted is the ramp-top (a.k.a. hood or ledge) version with a spacer nub at the bottom.

Fathom, Black Pyramid, and Spectrum are the three pins I've found that use the green drop targets you mentioned in a PM -- all three use the ramp-top version.   :dunno


Scott

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Re: So ... 3d Printers....
« Reply #735 on: May 18, 2018, 09:39:42 am »
Spectrum.   :timebomb:

Titchgamer

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Re: So ... 3d Printers....
« Reply #736 on: May 19, 2018, 09:18:42 am »
Well I finished my design for the TMC speed loader/winder and I have also altered it to fit my T15.

Also printed some extended mag releases for my TPXs.

Paintball prints seem to be the order of business atm lol

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Re: So ... 3d Printers....
« Reply #737 on: May 19, 2018, 12:14:45 pm »
Well I finished my design for the TMC speed loader/winder and I have also altered it to fit my T15.

Also printed some extended mag releases for my TPXs.

Paintball prints seem to be the order of business atm lol

You use tinkercad?

Titchgamer

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Re: So ... 3d Printers....
« Reply #738 on: May 19, 2018, 12:53:17 pm »
Well I finished my design for the TMC speed loader/winder and I have also altered it to fit my T15.

Also printed some extended mag releases for my TPXs.

Paintball prints seem to be the order of business atm lol

You use tinkercad?


Ashamed to say ive been using sketchup lol

HaRuMaN

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Re: So ... 3d Printers....
« Reply #739 on: May 19, 2018, 02:47:11 pm »
Well I finished my design for the TMC speed loader/winder and I have also altered it to fit my T15.

Also printed some extended mag releases for my TPXs.

Paintball prints seem to be the order of business atm lol

You use tinkercad?


Ashamed to say ive been using sketchup lol

I like sketchup wayyyyyy better than tinkercad

Titchgamer

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Re: So ... 3d Printers....
« Reply #740 on: May 19, 2018, 03:12:04 pm »
Well I finished my design for the TMC speed loader/winder and I have also altered it to fit my T15.

Also printed some extended mag releases for my TPXs.

Paintball prints seem to be the order of business atm lol

You use tinkercad?


Ashamed to say ive been using sketchup lol

I like sketchup wayyyyyy better than tinkercad

So do I but its nowhere near as versatile.

Vigo

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Re: So ... 3d Printers....
« Reply #741 on: May 19, 2018, 08:33:00 pm »
Freecad, yo. Freecad.  8)

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Re: So ... 3d Printers....
« Reply #742 on: May 19, 2018, 11:08:19 pm »
Fusion360 is getting easier for me.

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Re: So ... 3d Printers....
« Reply #743 on: June 25, 2018, 07:39:08 pm »
Just wanted to say thanks for all the contributors to this thread.  I learned a lot plowing through these 19 pages.  I picked up an A8 and am having fun with it.  Still getting through some test pieces and upgrades.   :cheers:

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Re: So ... 3d Printers....
« Reply #744 on: June 25, 2018, 07:41:06 pm »
Just wanted to say thanks for all the contributors to this thread.  I learned a lot plowing through these 19 pages.  I picked up an A8 and am having fun with it.  Still getting through some test pieces and upgrades.   :cheers:

Same here! This thread was a great resource/kickstarter.
***Build what you dig, bro. Build what you dig.***

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Re: So ... 3d Printers....
« Reply #745 on: June 25, 2018, 08:17:47 pm »
I've been obsessed with trying to get the tweaks right with the settings.  Printing lots of tiny stuff.  There's a lot to absorb!  I feel like I should try to set up octoprint before I try anything large. 

And your experiences were especially helpful!

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Re: So ... 3d Printers....
« Reply #746 on: June 26, 2018, 05:02:00 am »
Octoprint is super easy to setup and use. Let me know if you have any questions about it.

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Re: So ... 3d Printers....
« Reply #747 on: June 26, 2018, 04:37:16 pm »
OK, thanks bud.  I have an old PI first gen collecting dust.  Allegedly it will work, so hopefully it's not too laggy.

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Re: So ... 3d Printers....
« Reply #748 on: June 26, 2018, 06:45:03 pm »
Yeah, basic OctoPrint is dead simple to get going and SOOO worth it.  I love having it.

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Re: So ... 3d Printers....
« Reply #749 on: June 26, 2018, 06:57:23 pm »
Yup octoprint FTW!

JudgeRob

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Re: So ... 3d Printers....
« Reply #750 on: June 27, 2018, 11:43:43 pm »
Anybody have tips for success printing something thinner than 1mm?  Like maybe down to .6mm?  ---steaming pile of meadow muffin--- starts to get weird down there...

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Re: So ... 3d Printers....
« Reply #751 on: June 28, 2018, 02:46:09 am »
Anybody have tips for success printing something thinner than 1mm?  Like maybe down to .6mm?  ---steaming pile of meadow muffin--- starts to get weird down there...

What issues are you seeing?

I've been printing custom badge holders which most have very thin text or art work. It took me several passes to figure out the best settings. Fortunately, I use Simplfy3d as my slicer, it has some great options for Thin Walls.

You can try keeping your Nozzle at .40 but change the extrude diameter to .30. Keep in mind that if you cant setup multiple processes per layers then the entire model will print with that setting.

Titchgamer

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Re: So ... 3d Printers....
« Reply #752 on: June 28, 2018, 03:00:49 am »
Thin and slow first few layers work well for me with no fan cooling.

I print at 0.2 20mm/s no fan for first 3 layers.

JudgeRob

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Re: So ... 3d Printers....
« Reply #753 on: June 28, 2018, 11:08:28 pm »
The prints are flimsy which is sort of expected at that thinness, but holes in the print and like the nozzle smears it around kind of.  I'll upload some pics. 

I'll try shutting off the fan.  Didn't think to try that...

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Re: So ... 3d Printers....
« Reply #754 on: June 30, 2018, 01:08:36 am »
Here's what I'm getting.  The one on the right is closer to 1mm.  Less than that and I get the other results.  (Those are supposed to be Galaga ships)


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Re: So ... 3d Printers....
« Reply #755 on: June 30, 2018, 01:48:39 am »
Here's what I'm getting.  The one on the right is closer to 1mm.  Less than that and I get the other results.  (Those are supposed to be Galaga ships)




My best guess would be a combination of your nozzle being to far away from the bed and/or your under extruding.

When its putting down the first layer it should be squished right down so the top is flat.

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Re: So ... 3d Printers....
« Reply #756 on: June 30, 2018, 01:51:31 am »
OK cool, thanks, I'll try some changes.

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Re: So ... 3d Printers....
« Reply #757 on: June 30, 2018, 02:42:14 pm »
Can you go to 0.5mm on your printer?

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Re: So ... 3d Printers....
« Reply #758 on: June 30, 2018, 03:34:47 pm »
I'm no expert, but just looks like a bad first layer to me.  First thing to check would be the level of the bed.
Looks like the nozzle is too high or the filament isn't melted enough.

I don't have the same printer, but have a .4mm nozzle and my first layer is .3mm.
Check the first layer settings in the advanced tab of Cura.
There is also a setting for initial line width there.  (mine is set to 100%).

You can see the lines on mine, but gaps are rare.
I sometimes print thin .5mm breakaway tabs to hold smaller prints down and they always come out solid.

EDIT: print speed is set to 40 and bottom layer speed (under advanced) is set to 20.
I think I usually print stuff faster than this, but those are the settings currently in there.

« Last Edit: June 30, 2018, 03:53:57 pm by BadMouth »

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Re: So ... 3d Printers....
« Reply #759 on: July 23, 2018, 06:29:03 pm »
Finally got around to these projects.

Sent from my Life One X2 using Tapatalk


  
 

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