Considering we are almost out of kapton tape and pla can be printed straight onto warm glass maybe we should swap out the glass for the one Thor brought in.
As far as cleaning the nozzle I find the best way is to carefully wipe it with paper towel or gently scrape with a small screwdriver while it is hot. If there is something other than plastic clogging the nozzle we may have try somthing more drastic like poking something very small (less than .35mm)though the nozzle. This, however would require removing the hotend because we want to poke through the nozzle in the same direction the plastic flows to avoid getting debris in the melt chamber which will just clog the nozzle again. I'll come to the space this evening and see what I can do. On 2013-10-13 1:40 PM, "Brian Kulyk" <br...@kulyk.ca> wrote: > k sorry > > > Brian Kulyk > 204.887.6988 > > > On Sun, Oct 13, 2013 at 11:20 AM, d-_-b <thor.robin...@gmail.com> wrote: > >> Re-read my numbers. >> >> >> On Sun, Oct 13, 2013 at 11:04 AM, Brian Kulyk <br...@kulyk.ca> wrote: >> >>> If 174.6 is too high, and you are having trouble getting the first layer >>> to stick, then changing it to 174.5 will raise the print head off of the >>> glass by an additional .1mm making it stick even worse, and 174.4 would be >>> worse yet. I think what you want is to move in the other direction, 174.7 >>> will move the print head closer to the glass. With ABS that seemed to be a >>> little too close, but PLA could be different, also now that the print head >>> has crashed, the measurements could be way out. >>> >>> >>> >>> >>> Brian Kulyk >>> 204.887.6988 >>> >>> >>> On Sun, Oct 13, 2013 at 2:43 AM, d-_-b <thor.robin...@gmail.com> wrote: >>> >>>> tl;dr -- Kapton needs judicious replacement, Thor needs help >>>> cleaning the tip. >>>> >>>> The tape does indeed need replacing. There are a couple tracks >>>> through the kapton from the head sliding while pressed down, but they do >>>> not interfere with objects printed at the center of the print bed. As there >>>> appears to be only one or two strips worth of kapton left on the roll they >>>> may be of better use to us to do emergency fixes there until new supplies >>>> arrive. >>>> >>>> I was in tonight and did several test prints. The head was >>>> running quite high above the print bed. Extrusions from it were showing >>>> gaps where the material was waving and warping as it was being layed down. >>>> I have not seen many prints with PLA but I did see some parts printed >>>> successfully by Stef. The prints at the 174.6mm mark did not show the same >>>> defined edges and indeed some of the edges were so soft and uncontrolled >>>> when being laid down that they folded under and over each other or piled up >>>> in clumps to be pushed around by the print head as it passed over. >>>> >>>> I moved the print head Z axis measurement in the G-Code preamble >>>> in increments of .1 from the original 174.??mm to 175.5mm. If the print >>>> was failing I paused the print, moved the Z axis up 30mm, and On each >>>> successive pass, the first layer got closer and closer to being evenly >>>> printed and subsequent layers were more defined. After setting the Z axis >>>> height to 175.5mm, the PLA did not stick to the kapton, and instead swirled >>>> around the hot end. I don't know if this is a result of the Z axis setting >>>> being too high, or if the PLA did not stick to the bed for other reasons. >>>> 175.4mm was still producing a very poor quality result that was much too >>>> thick. >>>> >>>> I stopped the print, moved the head upward on the Z axis by 20mm >>>> or 30mm, then tried to remove as much of the PLA from the head as possible. >>>> I sent a reverse command of 5mm, and released the PLA feed line, pulling >>>> it out of the machine. After doing some further cleaning of the print head >>>> I snipped off melt on the PLA feed line, re-inserted it into the print >>>> head, and let it warm up for a minute or so. >>>> >>>> Attempting to extrude 2mm got nothing, a further 2mm failed to >>>> extrude any material. I do not know if acetone is the right thing to be >>>> using to clean out the PLA so I did not attempt to use it. I am also not >>>> sure how to go about properly cleaning the extruder from the outside >>>> without risking damage to the thermistor or other components. If someone >>>> can point me in the right direction I will clean it up properly. >>>> >>>> >>>> >>>> >>>> >>>> On Fri, Oct 11, 2013 at 11:11 AM, Stefan H.A <stefan...@gmail.com>wrote: >>>> >>>>> I reduced the height by .1mm because I was having issues with prints >>>>> releasing from the bed half way through. I did a number of prints >>>>> successfully after that though. As Brian said the height changed after we >>>>> changed the z axis end stop and the command is g92 not g2. We did that to >>>>> give the operator more time to react if the z endstop fails again. >>>>> >>>>> I tested it and pulling the usb cable is not an effective emergeny >>>>> stop because the arduino seems to get power from both the usb and ac power >>>>> supply. This means to power off the arduino you need to unplug the the usb >>>>> and turn of the ac power. We should fix this. >>>>> >>>>> Does the tape need replacing? We are almost out of kapton tape so I >>>>> think we should order some more. I would do it but deliveries often go >>>>> missing from my mailbox. If anyone is willing to place an order please >>>>> check with me before purchasing as some options are better than others. >>>>> Also I think the printer has earned enough money to buy itself some tape. >>>>> >>>>> I think that's too large of a number, the correct height is now (after >>>>> installing the mechanical switch) something like 174.6. The exact value >>>>> can >>>>> be found by looking at the custom gcode settings in slider. >>>>> >>>>> You should not have to be entering this code manually, did you reuse a >>>>> gcode file, that was created before? Doing so is probably a bad idea. >>>>> On Oct 10, 2013 11:07 PM, "Ric Lim" <riclim...@gmail.com> wrote: >>>>> >>>>>> yeah they did. I did the emergency switch off (i.e. pulling the usb >>>>>> cable) but not before the head touched the bed. It did start from top >>>>>> though so maybe the point at which it prints needs tweaking? Tried g2 >>>>>> z184 (?) also but still the same result. >>>>>> >>>>>> On 10/10/13, Alex Weber <alexw...@gmail.com> wrote: >>>>>> > Has Stef, Brian, or Thor shown you how to use it? There's quite a >>>>>> bit that >>>>>> > goes into operating the printer correctly. >>>>>> > >>>>>> > >>>>>> > On Thu, Oct 10, 2013 at 7:42 PM, Ric Lim <riclim...@gmail.com> >>>>>> wrote: >>>>>> > >>>>>> >> I've tried printing on the 3D printer tonight and the head keeps >>>>>> touching >>>>>> >> the bed so the strips were scratch in the lower left part. >>>>>> >> >>>>>> >> _______________________________________________ >>>>>> >> SkullSpace Discuss Mailing List >>>>>> >> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >>>>>> >> Archive: >>>>>> https://groups.google.com/group/skullspace-discuss-archive/ >>>>>> >> >>>>>> > >>>>>> _______________________________________________ >>>>>> SkullSpace Discuss Mailing List >>>>>> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >>>>>> Archive: https://groups.google.com/group/skullspace-discuss-archive/ >>>>>> >>>>> >>>>> _______________________________________________ >>>>> SkullSpace Discuss Mailing List >>>>> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >>>>> Archive: https://groups.google.com/group/skullspace-discuss-archive/ >>>>> >>>>> _______________________________________________ >>>>> SkullSpace Discuss Mailing List >>>>> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >>>>> Archive: https://groups.google.com/group/skullspace-discuss-archive/ >>>>> >>>> >>>> >>>> >>>> -- >>>> -- >>>> ) thor.robinson; >>>> ) icon/phreshlyspun/ppca/skullspace >>>> >>>> -----BEGIN GEEK CODE BLOCK----- >>>> Version: 3.12 >>>> GMU/O/AT/! d- s+:+ a C++++ UL++++ P L+++@ E---- W@ N! o K? w--- >>>> O- M-- V? PS+++ PEY+ PGP+ t+ 5+ X R tv++ DI++ D++ G+ e* h-- r y+ z+ >>>> ------END GEEK CODE BLOCK------ >>>> >>>> _______________________________________________ >>>> SkullSpace Discuss Mailing List >>>> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >>>> Archive: https://groups.google.com/group/skullspace-discuss-archive/ >>>> >>> >>> >>> _______________________________________________ >>> SkullSpace Discuss Mailing List >>> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >>> Archive: https://groups.google.com/group/skullspace-discuss-archive/ >>> >> >> >> >> -- >> -- >> ) thor.robinson; >> ) icon/phreshlyspun/ppca/skullspace >> >> -----BEGIN GEEK CODE BLOCK----- >> Version: 3.12 >> GMU/O/AT/! d- s+:+ a C++++ UL++++ P L+++@ E---- W@ N! o K? w--- >> O- M-- V? PS+++ PEY+ PGP+ t+ 5+ X R tv++ DI++ D++ G+ e* h-- r y+ z+ >> ------END GEEK CODE BLOCK------ >> >> _______________________________________________ >> SkullSpace Discuss Mailing List >> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >> Archive: https://groups.google.com/group/skullspace-discuss-archive/ >> > > > _______________________________________________ > SkullSpace Discuss Mailing List > Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss > Archive: https://groups.google.com/group/skullspace-discuss-archive/ >
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