[Phone cases modeling]

I'm trying to make a phone case for my iphone 6 recently

The dimension is not hard to find as apple have released a guide for doing that,

but how many spaces between the cases and the phone you would leave? 0.3mm? 0.5mm?

and what is your frame thickness? 1mm? 1.5mm? or 0.5mm?

What materials would you suggest? ABS? Nylon? or even others?

Thanks!!

[Poor printing quality with lots of stringing :( How can I fix this??]

Rather than spending hours trying to print this case time and time again, simply print two 20mm cubes around 80mm away from each other, and see what happens. If you get stringing between the two, then first start by dialling down the temperature. For this sort of thing it makes sense to watch the printer while it is printing. It might give you some clues.

"Travel speed" <> "print speed". Travel speeds are the non-printing moves, when the hot end stops extruding and moves to another position to start printing again. You can push the UM2 up to 290mm/sec without serious issues.

Also, increase your retraction to 45mm/sec. Speed here makes a difference.

When printing 0.1mm layer heights, you need a lot less temperature than at 0.2, because you are extruding half the volume of plastic compared to 0.2. From what I see here and elsewhere, many people print at 0.2 and give temp values assuming that fact.

 

Thanks for your suggestion! I will try to print cubes first!

[Poor printing quality with lots of stringing :( How can I fix this??]

What material are you using? What machine? What travel speed are you using? What nozzle temperature?

PLA with Ultimaker 2+

Is the travel speed equal to printing speed?

The nozzle temperature is 210

[Poor printing quality with lots of stringing :( How can I fix this??]

Try activating combing, setting travel speed to 250mm/s and retract speed to 45 mm/s. The latter is set on the machine unless you changed the gcode flavor in legacy Cura to RepRap.

How to activate combing? I will have a try today! Thanks!

[Poor printing quality with lots of stringing :( How can I fix this??]

Retraction speed: 35mm/s

Retraction length: 4.5mm

Buildplate temp: 70

Layer height: 0.1

Shell thickness: 0.8

Nozzle size: 0.4

Printing speed: 50mm/s

Actually I have tried to slow down the printing speed to try to fix the problem, but it didnt do any improvement :(

Do you guys have any suggestion? Thanks

[First print "Y". Is this normal?]

Im using ultimaker 2+ to print this model by using ABS

The surface seems to rough, I wonder if this is normal or not

The setting is using the original one in the printer for the ABS material