1

Topic: First PLA Print

So I have this spool of yellow PLA and I've been running low on ABS, so I figured I give it a try. My Da Vinci is running the G firmware at this point and has an external SD card but other than belt tightening and lubrication nothing was changed on the actual printing part. Temperatures were controlled via the cartridge chips, using an arduino uno for programming. A star vase sample was printed using ABS at 230C for reference, ABS was then unloaded still at 230C.

For the initial loading I chose a temperature of 200C as this was within the range of both PLA and ABS. Loading was completely  problem free and I ran the extruder about 5 or 6 loading cycles to assure all ABS was gone. After successful loading I lowered the temperature to 185C and the heated bed to 50C, cleaned the printer bed and started the star vase demo. For ideal air flow (and since my spool holder doesn't let me open the top door), one side panel was removed and a small fan was pointed towards the inside of the printer. The print completed without a hitch, the vase looks actually better than the ABS version except that I had a hard time getting the vase of the print bed. I assume UHU stick is not recommended for PLA?

Here are the results, blue is ABS and yellow is PLA.

Post's attachments

2014-08-22 03.14.17.jpg
2014-08-22 03.14.17.jpg 800.78 kb, 1 downloads since 2014-08-22 

2014-08-22 03.14.35.jpg
2014-08-22 03.14.35.jpg 989.79 kb, file has never been downloaded. 

2014-08-22 03.14.40.jpg
2014-08-22 03.14.40.jpg 959.31 kb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.

2

Re: First PLA Print

What brand pla did you use? Every post I have seen about pla, the da vinci would not properly extrude

3 (edited by skywiselh 2014-08-22 23:37:21)

Re: First PLA Print

heidkampn1 wrote:

What brand pla did you use? Every post I have seen about pla, the da vinci would not properly extrude

I think it was makergeeks. com Item# orange-yellow-PLA - the reason why I am not entirely sure is because I actually purchased the $20 surprise pack from them and this is what I got. I've emailed them to confirm, but it looked mighty generic - no brand name on the package or spool. I completed a larger print last night and other than a slight layer shift (likely related to the XYZ software, used it because the demo was so successful and I figured the speed settings are the same) it came out really nice as well. Oh and printed directly onto clean glass, no problem and easy removal.

Honestly, I am really liking the PLA, it seems quite a bit easier to work with so far. And I did read all the horror stories before trying this, but I am still in my Amazon exchange window so I was willing to have Amazon take the risk wink. The key seems to be the active cooling of the build and extruder - from what I have read the extruder will otherwise get so warm that the PLA softens and doesn't feed properly, but all I did was set a fan next to the printer and take the side off.

I also wonder if people don't do the 200C "middle step" when switching from ABS to PLA as I am suspecting at 185 I would not have been able to clear the extruder of the old ABS. Here's the part I printed this morning (spool holder).

Edit: Emailed Josh from Makergeeks and this is the correct part number. And tonight gonna go to 190C as suggested elsewhere for even better quality. We'll see.

Edit2: Didn't try the 190C yet, but removal of the fan blowing into the case results into the clicking. Turned the unit off, put the fan back and resumed PLA printing without a hitch. Also did not have the A/C on, so it seems that environmental temps are important too.

Post's attachments

_MG_0547.JPG 3.09 mb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.

4

Re: First PLA Print

Has anybody else tried this fan trick? I have had an old spool of pla that I cannot get to extrude for quite a while

5 (edited by sedzen 2014-09-03 04:07:06)

Re: First PLA Print

I have been printing with PLA for awhile now. I am using the stock G firmware, Slic3r, and modded 1.1.29.42 ver of XYZware. I started with simple mods using kapton tape to create a better air duct/shroud to basically close off the gaps around the extruder fan forcing more air around the filament barrel. This still required the top to be open and usually required an external fan blowing in to help cool. I have since created a replacement fan mount/shroud for the extruder fan and added heat sinks to the extruder. I can now print in PLA with the door and top closed without any issues.

Here are some pictures of my mods that allow me to print with PLA including my initial tape shroud that has been replaced with the printed fan mount/shroud. I have tested several colors of "Gizmo Dorks" PLA from Amazon and some Shaxon translucent yellow PLA that I picked up at Fry's. Gizmo Dorks filament is affortable and both ABS and PLA print great in my printer. The Shaxon prints ok but the print quality doesn't compare to Gizmo's. I also included a few quick test prints pictures. Both were printed at higher than normal speeds.

I am currently working on mods that replace the stock nozzle/block with a generic heater block with interchangeable nozzles. I have a .2mm nozzle on my printer at the moment. (not pictured or in the video). I will try to post pictures of my latest mods when I have it apart again. My next challenge is to be able to print NinjaFlex!

All of my printable DaVinci parts are on Thingiverse dot com /sedzen/designs
I also have a Youtube video showing my Modded XYZprinting Da Vinci 1.0 printing PLA (search youtube for "sedzen da vinci")

Post's attachments

Ext Fan.jpg
Ext Fan.jpg 1.38 mb, file has never been downloaded. 

Octo.jpg
Octo.jpg 1.21 mb, file has never been downloaded. 

PLA Vase.jpg
PLA Vase.jpg 1.32 mb, file has never been downloaded. 

Tape Duct.jpg
Tape Duct.jpg 1.5 mb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.

6

Re: First PLA Print

I have tried everything I know and my Davinci printer refuses to push PLA.

7 (edited by rudi 2014-09-15 05:52:42)

Re: First PLA Print

jeeplvr wrote:

I have tried everything I know and my Davinci printer refuses to push PLA.

same here ...aplied the mods to the printerhead and so on

tried different speeds ,

simply cannot print pla with the davinci head


my first pla print was ok ...all others not working pla gets stuck in the wire guide