It's a nice material to sand down. I'll use a polyurethane spray to seal when I have bonded both parts together with a polyurethane bonding agent (Titebond) and finished all my post print work.
Edited by Guest
It's a nice material to sand down. I'll use a polyurethane spray to seal when I have bonded both parts together with a polyurethane bonding agent (Titebond) and finished all my post print work.
Edited by Guest
Lots of good information in here. I see a fair amount of stringing, do you think this is just the nature of the material or something that can be tuned out?
Lots of good information in here. I see a fair amount of stringing, do you think this is just the nature of the material or something that can be tuned out?
I didn't use any retraction at all and printed both these handle components at 0.17 layer height so I'm sure most will get much better 'precision' results than me... these took about 11 hours each by using an 0.8 nozzle to get them out nice and quick (at 50mms)... I am also very much into my post print work so waiting 30-35 hours each print doesn't make much sense for me and my large prototypes. I reckon these 'quick' prints above are much more of a 'baseline' than anything else with the stringing probably part of my settings although it may also be an aspect of the material.
The top image is an extension to my handles and I printed that at much finer settings (can't remember them now) and the difference is very clear.
Lastly, I only used a 2.8mm wall and 2.0mm Top/Bottom and 20% infill setting and yet the strength is still uncanny... as I said above... this material is literally peerless!
Thanks for your comment by the way.
Edited by GuestAh, no retractions and 0.8 nozzle, that'll do it I need to do some tests myself, I have a spool of the stuff here which I haven't gotten around to using yet. Thanks for saving me some time on testing
Never having worked with PC, I have read this and the other post about the Polymaker PC-MAX with great interest, and decided to start my first tests using your findings about temps, raft, flow% etc. I would like to share my findings with others because my sweet spot has some settings that are a bit "differnet" .
First prints were a big disappointment: blobs, stringing and what more. On the positive side I have to mention that I have not seen any warping, I use the Buildtak in combination with 3DLac, this combo made taking the print of the plate quite easy too.
After quite a bit of testing, I have come up with settings that work for me (quite interesting to notice that most is close to what Polymaker recommends).
In summary:
- like others I found that it is critical to keep speeds low (I like 40mm/s even better than 45mm/s)
- unlike @Artiz I kept flow at 100% - the 135% mentioned caused excessive blobs in my testing
- l found that playing with the different line widths had a huge effect, mostly the line width for top/bottom (with my .4 nozzle 50 gave a very nice and smooth surface (I still have to find out how to best minimize the stitches from shell infill to wall though)
- I found that lowering the line width for infill can quickly lead to under-extrusion
- In my case the best remedy against oozing and stringing was using retraction (6.25mm @ 25 mm/sec); 2mm Z-hopping also helped a lot.
- Surface of walls was much smoother when printing outer walls first, and doing the infill after the walls; this also eliminated signs of the infill on the outside, and the result was identical to the design dimension-wise when insetting the outer wall 0.025mm (half the difference between nozzle size and wall line-width)
- I found that the size of the air-gap between raft and first layer makes a HUGE difference in getting the raft from the print nicely. I found that using 1.5 times layer-height works very well.
I have just published my first PC-MAX print on Youmagine, if you find the little thingie usefull, feel free to print for yourself On the pictures you see the result as it came straight of the bed (so without cleaning up, sanding and finishing).
Edited by GuestUpdate: I have successfully printed 5 low prints without any warping or curling and just using a 10mm inside and outside brim.
Model was appr. 17cms x 12cms square and 7.5mm high having not much more than a 2.5mm walls and 6 appr. 1.5cm2 insets of irregular shape. No fillets of cambers anywhere in the model.
I thought this a good suspect to get warping, especially on the one long end where there was no inset at all and the wall made a a sharp 90 degree turn), but to my surprise it sticked to the bed really good.
Bed: buildtak @ 85C (lightly sprayed with 3DLac) / Nozzle 255C / Speed 35mm/sec / 0.1mm layer height (also first layer and brim!) / Print jerk 15 / Travel jerk 20 (man.... those were long prints considering...!)
Prints came out really nice and very accurate dimension-wise.
After annealing and cooling down I put them in the freezer for 15 minutes, this made getting it of the bed easy (admitted: the low brim took some work to get rid of completely)
Edited by GuestUpdate: I have successfully printed 5 low prints without any warping or curling and just using a 10mm inside and outside brim.
Model was appr. 17cms x 12cms square and 7.5mm high having not much more than a 2.5mm walls and 6 appr. 1.5cm2 insets of irregular shape. No fillets of cambers anywhere in the model.
I thought this a good suspect to get warping, especially on the one long end where there was no inset at all and the wall made a a sharp 90 degree turn), but to my surprise it sticked to the bed really good.
Bed: buildtak @ 85C (lightly sprayed with 3DLac) / Nozzle 255C / Speed 35mm/sec / 0.1mm layer height (also first layer and brim!) / Print jerk 15 / Travel jerk 20 (man.... those were long prints considering...!)
Prints came out really nice and very accurate dimension-wise.
After annealing and cooling down I put them in the freezer for 15 minutes, this made getting it of the bed easy (admitted: the low brim took some work to get rid of completely)
Two excellent posts with loads more detailed info and settings Zwakie... thumbs up!
Update: I have successfully printed 5 low prints without any warping or curling and just using a 10mm inside and outside brim.
Model was appr. 17cms x 12cms square and 7.5mm high having not much more than a 2.5mm walls and 6 appr. 1.5cm2 insets of irregular shape. No fillets of cambers anywhere in the model.
I thought this a good suspect to get warping, especially on the one long end where there was no inset at all and the wall made a a sharp 90 degree turn), but to my surprise it sticked to the bed really good.
Bed: buildtak @ 85C (lightly sprayed with 3DLac) / Nozzle 255C / Speed 35mm/sec / 0.1mm layer height (also first layer and brim!) / Print jerk 15 / Travel jerk 20 (man.... those were long prints considering...!)
Prints came out really nice and very accurate dimension-wise.
After annealing and cooling down I put them in the freezer for 15 minutes, this made getting it of the bed easy (admitted: the low brim took some work to get rid of completely)
Two excellent posts with loads more detailed info and settings Zwakie... thumbs up!
Thanks @Artiz, to learn and share, that's the spirit we all need hu?
I'll be sharing future test experiences as they come along, PolyFlex is next on the list (don't know when I will start with that, will definitely be shortly - for sure it will be fun tinkering with that stuff)
Edited by GuestI was looking for for a filament which was at the same time 'high-temp' and with good mechanical strength.
So I bought a spool of PC-Max!
I haven't seen this post before, so I went with quite standard settings: Cura defaults, 0.2 mm layers, 260°C, bed 80°C, no fan and a brim (on BuildTak as recommended)
I am quite happy with the result, no particular issue, it bridges better than expected and the top layer is very nice.
(Always difficult to get good pictures from black prints...)
The only problem I had was to remove the print from the BuildTak, maybe a raft would make it easier.
I just got a roll of pc max and it seems to print like a charm on my Um2+ with modified all metal hotend. In order to achieve good layer bonding and make maximum use of the materials strength I print at at least 265C under an enclosure. Warping hasn’t been an issue so far as long as you keep the bed temp around 95-100C and make use of a glue stick evenly spread over the build plate (in my case of an UM2 glass). I don’t use a brim. Coming time I’ll experiment with a small fan speed of 5-10 percent as that might improve the prints aesthetics more. For the right settings the Cnc kitchen review of the material is recommended watching.
I went completely away from ABS since I discovered the PC-filaments Ultimaker PC as well as the Polymaker PC-Max. At first I was kind of afraid of PC-filaments because its mostly called so difficult to print.
I print them both with the default settings on my UM2+ (260°C/110°C) but use (other than recommended) just gluestick and a brim as bed-adhesion on the glassplate what works fine. Don't try it directly on glass, I ruined a glassplate in the beginning when the PC cracked out pieces of the glass while cooling down.
For small parts with steep overhangs or bridging I set the cooling fans to 12% (under that my fans don't start reliably).
I have my UM2+ fully enclosed, without that I got some issues with warping and it's important to let the parts cool down slowly.
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Artiz 27
Absolutely no problems with it coming off the glass... although I did make the mistake of allowing it to cool before sticking it in the oven for an hour at 100C... it warped very slightly as it cooled and detached itself from the glass/hot plate but not enough thankfully to affect the print. Easy enough to just remove the glass and the print together but make sure it goes into the oven straight away... as soon as the print is finished. The annealing process just relaxes the print so that any further/future warping is checked. After an hour just turn the oven off but leave it inside to cool slowly (20-30mins) after which the print has virtually detached itself.
You can just wash off the WolfBite residue from the glass too so no scraping or scratching... big bonus.
I am currently printing the other half of my handle and will put up some images when done.
The finished prints seem to have a very slight flexibility which just adds to this material's strength and durability... this stuff can really take the knocks, bashes and drops... ideal for my mechanical/functional purposes that's for sure.
Only negative is the Raft hasn't come off easily so I may need to do quite a bit of sanding down to get the measurements absolutely correct when bonding my 2 parts together.
Edited by GuestLink to post
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