SoliForum - 3D Printing Community — Digital Sundial

Re: Digital Sundial

2016-02-29T10:59:37Z

It looks like a 1k resistor and NPN transistor are all that are needed to populate my second fan plug:

https://github.com/luc-github/Repetier- … /issues/64

Re: Digital Sundial

2016-02-29T09:42:32Z

It's actually best to have the extruder fan on all the time, particularly with pla.
12v should be ok, the E3D uses a 12v fan.

Re: Digital Sundial

2016-02-29T09:29:43Z

I ran the same print with fan off and although the overhangs look like crap the adhesion was better.

So my plan now is to move the extruder fan to the layer fan holder and reload the FW with layer fan control.

I'll put my externally powered fan on the extruder. Is it ok that that fan is always on? Is 12v worth of fan power going to be too much or is that OK for the hot end?

Re: Digital Sundial

2016-02-29T04:46:37Z

What works really well for me with ABS is to print the first layer with the bed at 105C and the fan off. I then drop the bed to 90C and turn on the fan for the rest of the print (don't wait for the bed to reach 90C - just keep printing). The hair spray seems to hold better at 90 to prevent warping (in fact my biggest problem is glass breakage as large completed parts cool).

Re: Digital Sundial

2016-02-29T04:41:03Z

That is correct you don't always want the layer fan on with ABS.

With ABS you want to let your slicer control when its on and the speed. you may need to fin tune it by changing the cooling settings.

Re: Digital Sundial

2016-02-29T01:56:11Z

The half to the right of the colon is the difficult one.

I installed my layer fan yesterday and am pleased with the results on overhangs. But my warping is worse than ever.

I'll check my bed level but I don't think that's it since the first layer went on great.

I feel like the fan is making the upper layers constrict andpulling up the bottom.

IMO, at least with ABS, layer fan can't always be on.

Re: Digital Sundial

2016-02-28T08:37:52Z

I printed one half of it yesterday with ABS with no infill.
It came out ok apart from a little bit of warping at one end (my fault, bed not levelled properlly) and it does work.

Re: Digital Sundial

2016-02-28T04:39:06Z

I did 15 infill

Re: Digital Sundial

2016-02-28T04:22:35Z

grey 3d solutech pla,
temp 205

The slicer wouldn't slice the one piece one corectly.

Re: Digital Sundial

2016-02-28T02:47:13Z

What filament, heat, and infill did you use?

Just out of curiosity... why didn't you print it all as one piece?

Re: Digital Sundial

2016-02-28T01:30:20Z

They work from what I can tell (tRied it out by hand at noon) I'm still printing the parts that let you put it on the jar

Re: Digital Sundial

2016-02-27T21:24:51Z

Yes it does look amazing. How do the numbers work?

Re: Digital Sundial

2016-02-27T17:50:20Z

here is a picture of it.
it came out pretty good I didn't have to do any clean up

Re: Digital Sundial

2016-02-27T16:09:00Z

Well I have the sundial portion printed now. I had to print it in two halves what I kept downloading the full it wouldn't slice right.
Letting the epoxy set for the two halves and will go try it out. the print looks really good though.

Re: Digital Sundial

2016-02-26T18:00:53Z

No, but a S3D raft might help with the holes getting filled in on the bottom.

My first problem was too high of extrusion for the base layer. I had it at 200% and it filled in the holes on the heated plate, so I had to carve them back out with a scalpel.

My second problem was I set the layer size at 0.3.

I cut out just the "20" digit and tried again with 120% extrusion on first layer, and 0.1 layer height. A little better, but you will see when you print it. The intricacy of the "20" digit is insane!