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Topic: Davinci 1.0-PLA and Cooling

Successfully printed a 10mmx15mmx5mm block w/ Buxmont PLA.

However, when added another block on top, 15mmH x 10mmL and 5mm W  it all melted.

Mounted a 50mm fan, on front of extruder stepper w/ thin blower chute, going under belt and right near nozzle,
directed at part and the print went ok,
but the opposite side of block print had melted edges.

The cooling affects only 3 sides of the printed block. The unexposed side still gets alittle mushed.

Cant figure this out. Makerbot uses a turbo fan but its directed at one side.

Slicr3 temp settings are 190/70, 185/70. Speeds 30.

Any successful PLA prints w/ Davinci 1?

DaV1.0  10/13
Repetier FW 0.92, Solidify3D

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Re: Davinci 1.0-PLA and Cooling

I'm not sure what those temperature settings mean but I know from the specs that PLA plastic:
1.  Needs a nozzle temperature of 190C.
2. Needs a Printer Bed temperature between 60C and 65C.

I hope this helps.

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Re: Davinci 1.0-PLA and Cooling

when i tried to use PLA, the head still heated up to 220º and then it slowly cooled down... so you have to wait for a few minutes before the extruder can cool down.

maybe try pausing for 5-9 minutes and see if the extruder will cool down to 190 and then resume the print.

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Re: Davinci 1.0-PLA and Cooling

nexoneo wrote:

when i tried to use PLA, the head still heated up to 220º and then it slowly cooled down... so you have to wait for a few minutes before the extruder can cool down.

maybe try pausing for 5-9 minutes and see if the extruder will cool down to 190 and then resume the print.

Are you using a cartridge resetting tool? The chip in the cartridge decides the initial print temperature. Your G-code will over ride it but you have to wait for it cool cool down if the chip is making it hotter. Your best bet is to use the resetting tool and set the cartridge for the temp you need from the start then the g-code will have little to change.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

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Re: Davinci 1.0-PLA and Cooling

Im using the basic resetter from wctek. Resets filament length only.
Temps from sclicr3.

DaV1.0  10/13
Repetier FW 0.92, Solidify3D

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Re: Davinci 1.0-PLA and Cooling

knucklbustr wrote:

Im using the basic resetter from wctek. Resets filament length only.
Temps from sclicr3.

That would be the issue. The stock cartridge is programmed on the chip to set the extruder to 220. So that takes place before the G-code starts. Once the G-code loads then your temp will be set but you will have to wait for it to cool. The only way around this is to get a resetter tool that allows you to program temps as well. There are some out there of course at a higher cost.

Your other option would be to wait for XYZ to release PLA cartridges so you will have one that will set proper temps and then you can just reset counts as you do now.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

7 (edited by knucklbustr 2014-11-02 02:40:14)

Re: Davinci 1.0-PLA and Cooling

carl_m1968 wrote:

That would be the issue. The stock cartridge is programmed on the chip to set the extruder to 220. So that takes place before the G-code starts. Once the G-code loads then your temp will be set but you will have to wait for it to cool. The only way around this is to get a resetter tool that allows you to program temps as well. There are some out there of course at a higher cost.

Your other option would be to wait for XYZ to release PLA cartridges so you will have one that will set proper temps and then you can just reset counts as you do now.

The print is an L shape block.  The lower part-no problems. Its the small 10mmx5mm chimney top piece that has the prob.
XYZWare( using modded XYZWare) shows temps at Sclicr settings only a few seconds into beginning of print. Its low enough for PLA to print.
Ive had no stuck filament. Attched are 2 sml thin heat sinks on top, both sides of extruder.

The fan and duct worked, but only on 3 sides. The leeward side, Y+ cant get cooled because the air cant hit it.
Yet Ive seen videos w/ similar fan setups printing PLA.
More expensive printers are using 2 fans. So it seems to be prob cooling the extruded PLA. Maybe the fan isnt powerful enough.
I wonder If a delay in G-code can be inserted before print ? Like G4  P10 for 10 secs.

DaV1.0  10/13
Repetier FW 0.92, Solidify3D

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Re: Davinci 1.0-PLA and Cooling

knucklbustr can you share the design of that fan duct? I'm currently using thingiverse[dot]com/thing:447903 but it seems to blow too far from the nozzle and all over the bed. I'd like something that gets closer to the extruded filament, although with so little clearance it has to be difficult...