Another Adhesion vs warping issue
So after 20+ near perfect prints. I was happy with my setup and moved my printer to its new home in a closet/bookshelf in my office. Seemed it would be a perfect spot, no A/C vent in room, door can be closed to control environment. Immediately started having issues with prints popping off the build plate. ALL PLA AT THIS POINT. Adjusted temps, was running 210/55, bumped to 215/60, no difference. added a Brim with some minor success on smaller pieces. Z height seems to be OK. I repeated a full XYZ calibration which did seem to improve my prints. but I tried 7 or 8 times to print http://www.thingiverse.com/thing:1366605 every-time it kicks the balls off the heatbed after the 3rd or 4th layer. not sure if the nozzle is hitting them or if they are popping off.
Then I gave up and printed this http://www.thingiverse.com/thing:1269699 it printed perfect except the front left corner pulled away. still a functional print but not pretty. see the picture attached. (tried rotating it several times, it always shows turned sorry) not the best angle but shows the front left corner and part of right puled up off the bed.[attachment=0]20161230_053542[1201].jpg[/attachment]
same filament with all prints, Hatchbox burgundy PLA. guess I could switch filament
Considered that a brim might work for the 2nd one but didn't help the 1st object because the balls are independent. no room for a brim for them. maybe a raft? but haven't needed a brim or anything on previous prints. concerned with bed adhesion. so I'd really like to just slve the issue. I'm religious about IPA between all prints
Considered trying to print and use this
http://www.thingiverse.com/thing:1776031
but I'm not convinced it' a leveling issue since it happens in different spots.
I've printed large new spool holders and several other object with zero adhesion issues with the Prusa Greeen PLA and the Hatchbox Black PLA.
I'm using Slicr prusa edition with the zhop profile, printing currently on both of these with 0.35 first layer and 0.2 or 0.15 layers after that. cooling is off for first 3 layers and print speed at 60% for first layer.
if I assume it's this one filament being weird, what tips do you have to troubleshoot? better to increase temps? go even slower? trying to learn so any
ideas to improve adhesion in a very new and previously trouble free print bed would be appreciated?
thanks
Shawn
Re: Another Adhesion vs warping issue
early in the print just a few layers in. all was good. no warping or curling
[attachment=0]Attach35774_20161229_200255[1214].jpg[/attachment][attachment=1]Attach35768_20161229_195328[1215].jpg[/attachment]
Re: Another Adhesion vs warping issue
Print the prusa logo (1st layer only) and then take a photo to post on this forum.
Did you redo the live Z adjust?
Also take a photo of the new MK2 resting place.
Does the new home move at all? Is it near a window that gets direct sun?
Also, what is the air temp of your office?
Every time you swap filaments, it is good to do a live Z adjust, even if that filament is made by the same vendor.
Are you raising the Z axis to about 70 before preheating to make sure the pinda does not get warm?
If you move the printer back to the previous location, does it still have the same issues after doing running the re-calibrate and live z-adjust?
Which slicer are you using, which printing profile?
Also noticed that object is some what small and the thingiverse notes mentioned using a raft. Before using a raft I would give the glue stick a try since glue wipes away pretty easy vs. cleanup of raft material.
After printing the logo, print the object you are having problems with but only the 1st layer and post the photo to this thread.
Re: Another Adhesion vs warping issue
I can do all that when I get home. I did a full XYZ and a full live Z after the move.
honestly the V2 calibration is voodoo to me I cannot see a noticeable difference in the filament bead height regardless. maybe a need a better color to tst with. I have black, burgundy and green at this point, white on order.
I have not moved it back to the previous location yet because it was essentially in the center of the room and isn't a viable location long term.
the current location is a wooden file cabinet only 2 drawers tall very heavy/sturdy. not in direct sun actually a closet and ~74F but does get warmer when printer on for a while.
I have never raised the z axis during preheat. I simply preheat at the location it reset from the previous print.
Re: Another Adhesion vs warping issue
With regard the the V2 calibration:
-First slow down the print speed to 60% by rotating the knob once the print starts.
-Let one horizontal go, then adjust up make note of the z offset. Next horizontal line, adjust the other direction and record the value.
-Once the print is complete, use your finger to see which of the line is sticking better. If they stick about the same, run it again increasing the offset values in both directions. Start with small values and be careful not let the nozzle get to close to the bed to avoid scratching the surface.
Re: Another Adhesion vs warping issue
slowing down the speed made all the difference in the world.
thank you
lastly I also printed this http://www.thingiverse.com/thing:1776031 and it revealed that the front of the bed was down ~ 18um which was contributing to the issues.
this print also helped me fine tune some extrusion issues I was having in that it revealed all sorts of little issues that I was able to fix one by one. I still cannot print the original object it still figures out a way to kick the small balls off the bed, they appear to be curling up as they cool and that curve is allowing them to catch on either the nozzle or the housing and they get bounced off the bed. not the end of the world honestly just don't like being able to print something that should work but I understand spheres especially small ones are challenging. regardless.
thanks for the help
Shawn