[Bed Temperatures]

Thanks for the info, gr5.

I want to go to 140-150degC because I am trying to print with POM.

If I use a bed temperature of 105-110deg C, using adhesion sheets,

the POM warps and lifts of the bed at the edges.

The POM prints OK at a nozzle temp. of 225degC.

I already have an enclosure.

i.e. I don't need to alter the firmware (I think), but I need the supplemental heater .

So, its not really a problem with printing POM, but the problem

is insufficient heat to the bed.

 

[Bed Temperatures]

I want to know if anyone has a modification for the Ultimaker 2+ that enables one to reach a bed temperature of 150degC

[Machinable wax]

I have obtained some Moldlay (from FormFutura) and given it a try.

170C nozzle, heated bed=35C, blue tape, layer height=0.2mm,

fan=0%, infill=100% nozzle=0.4mm

It printed beautifully with no hint of lifting from the bed, and no warping.

There was no problem with the supports.

This is the way to go...vastly superior to Machinable Wax!

[Machinable wax]

The machinable wax can be obtained from www.machinablewax.com

It is listed as 3mm (and 1.75mm).

I ordered it not knowing whether it would feed through the bowden tube.

I am happy to report that it did not cause feeding problems (I have an Extended 2+

machine).

I ordered it with the lost wax process in mind.

The biggest problem (with the wax) is making stick to the bed.

Also its very hard to print with support members (because the support members fuse with the part)- I talking about support members that bridge to the outside surface (not support members inside holes).

 

That machinable wax, is that available in 2.85mm filament? Or do you use some feeder/melting pot you designed by yourself on top of the printer head?

If filament, how wel does it transport through the bowden tube and feeder? Thus without breaking, and without grinding?

Such wax might also be very usefull for artists who want to make bronze sculptures in the traditional way by moulding and casting. Instead of making a clay original, they could print it in wax. Or for casting small automotive parts in iron or aluminum, such as model airplane engine parts.

 

[Machinable wax]

I've obtained Blue Tape from FormFutura.

I've run the same component with bed temp-100degC and 100% infill

printing on Blue Tape, and it worked...no lifting off the bed!

I've also run the same component at 30% infill using hair spray and did not experience lifting off the bed.

So a summary

nozzle temp =145 degC via gcode=M302

bed temp=100 degC

print speed =20mm/s

no fans until layer 75 then fans=30%

infill=100%

brim

blue tape

[Machinable wax]

Thanks Labern!

Lowering the temp. to 145 degC did help as far as the holes, and surface texture are concerned.

But I still had to print at a bed temp. of 100 degC, fans off, to make the part stick to the bed.

 

If you enter M302 ( allow cold extrudes command ) into the start of your g code then it will allow you to print at temps lower then 170deg.

 

[Machinable wax]

For the last week I have been experimenting with Machinable Wax.

The Machinable Wax website suggests the details for 3D printing..

nozzle temp=140-150 degC

bed temp=65-75 degC

fans=on

print speed=20-70mm/s

These are the finding using a 0.4 nozzle, and layer height=0.2mm

The first thing I found was the nozzle temp. had to be increased to 175-180 degC

as nothing would come out of the nozzle at temps. below 170 degC.

The second I found was to turn the fans off, otherwise the print would lift from the bed.

The biggest problem I found was keeping the 3D print on the bed.

I tried hair spray, and the so-called Mod Podge (Elmers glue cut with water)

at bed temps between 30 to 100 degC.

I achieved to most success with a bed temp of 100 degC and hair spray (or Dimafix)

with a print speed of 20mm/s.

It was necessary, for the part in question, to turn on the fans to 20%, after 75 layers had been printed.

(this was to prevent the layers sagging above the holes).

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[Nylon Printing Troubleshooting(warping+burning)]

you are using far too high a bed temperature

Taulman recommends a bed temp. of only 45degC for Alloy 910

[Printing with Nylon: Conclusions]

I experienced no problems printing with Taulman's 910 Alloy

nozzle=0.4mm

temp.=247degC

heated bed temp.=45degC

fan=0

flow=100%

infill=100%

glue stick applied

layer height=0.2mm

brim applied

speed=50mm/s

The prints are really flat.

regards

Bill