Re: Unboxing, build reports, reviews... Link collection
Hi Ron,
I checked the x-axis idler part .stl CAD where you mentioned you had the head of the screw pull thru. The inner surface of the counterbore does have a thin section where the head of the screw comes to a rest. Did that thin plastic section get pulled thru and break?
I examined the part in question, there is a lip for the screw head to seat on, however it only 1mm thick. I can see why tightening the screw would damage the lip. I would recommend after inserting the nylon nut, tightening up the screw so that 1.2-1.4 mm of the screw head is still protruding above the surface of the part. The nylon nut will keep it from loosing up and thghtening it further serves no purpose other than damaging the part.
I agree Ron videos are a nice addition and highlights the issues we need to beware of when building. I can see already I am going to have to recruit a little help with extruder part 6 build. I'm right handed but building the printer with my left hand, since I recently fractured my right shoulder and have it in a sling. Build part 2 took me almost 3 hours to complete, But struggling with the black parts in the extruder build is definitely going to take two hands. Ron even commented a few time that he wished he had a third hand.
Re: Unboxing, build reports, reviews... Link collection
Thanks for the comments 🙂
I need to print another part.. its on my "do it soon" list 🙂 I just hate that I don't have any Prusa Orange ABS to use.. only some Grey 🙁
Ron
The printer parts are made out of petg.
Really good to know.. for some reason I thought they were ABS. Thanks!
Re: Unboxing, build reports, reviews... Link collection
Really good to know.. for some reason I thought they were ABS. Thanks!
Josef answered here https://shop.prusa3d.com/forum/original-prusa-i3-mk3-f30/what-tpye-of-filament-mk3-parts-are-made-from-t6846.html#p48547
"Right now PETG mostly, excluding the extruder fan shroud." In a later post in that thread he states that the shroud is ABS.
Re: Unboxing, build reports, reviews... Link collection
Quick check in, took right about 8 hrs on the nose to complete the build. The final steps video on calibration is missing on the instructions, but I muddled through with the handbook, not quite as clear as I had hoped. But WOW!!! I am blown away! My previous printer was a Monoprice Maker Select v2 (Wanhao i3 clone). Right off the bat, first layer was gorgeous! And amazingly quite! 😯
Only stumbles I encountered were the printed spool holder was to tight, and snapped trying to install. Even after whittling a bit with an eXacto knife. Fitting all the cabling in the box was a challenge. And I had to swap out some screws when mounting the bed, for some reason a couple had heads to big to fit flush. Luckily there were extra in the spare bag that fit. I notes these in the instruction comments.
Re: Unboxing, build reports, reviews... Link collection
New build.
Re: Unboxing, build reports, reviews... Link collection
I received my printer yesterday 12/12/2017 and completed the physical build in approximately 4 hours. I thought I would share a couple of notes for things that worked well and things that did not:
1) Squaring the frame. I tested for the frame to be square and level using an 18" square marble tile that I know to be flat. I spent more than half an hour attempting to ensure the frame sat square and even. No matter what I did, each time I torqued the frame screws the frame would gain some amount of wobble and would not sit squarely on all 4 feet unless specific combinations of screws were left loose. My assumption is that the ends of the aluminum extrusion are not quite at 90 degree angles as the best I was able to achieve was approximately 0.1mm of lift at one corner. This is probably not enough to matter, but still I think there ought to be ways to increase the reliability of building a perfectly square frame.
2) Linear bearings. Since I have not built a motion platform using these bearings before, I really don't know what "slide easily" and "quiet" means in the context of the build guide. My (probably naive) expectation was that the rails would slide on the smooth rod with zero noise and almost no resistance in much the same way that rotary bearing glides move (think air-hockey level noise and friction) -- that is to say that without a belt to retain it, a tiny tap would send the build place from end to end. This is not at all what I have. Sliding the bearings on the rail feels a little bit 'choppy' and makes a bit of noise. I am assuming that the tiny amount of uneven loading is negligible for these motors, but it would be nice to confirm if my machine's behavior is expected.
3) Included tools. It was a nice surprise to see the included toolkit included more than just a couple of token chinese-made hex keys. Still, 90% of the build involved tightening 2.5mm hex bolts. The only thing that absolutely required a screwdriver was hooking up the PSU and heated bed to the RAMBO board. I would strongly suggest that adding a 2.5mm ball-end driver with a suitable plastic handle would be an enormous benefit. I credit having such a tool with the reason my build was completed so much faster than others. IMO this is would be a much better tool to include, even if you have to ditch the screwdrivers or pliers.
Re: Unboxing, build reports, reviews... Link collection
Assembly tips
I've watched some Live Build Videos that they have trouble screwing the YZ frame without getting skewed.
You could place some heavy items (books) on the stand when screwing it together.
Then the weight would help to get the YZ frame flat.
Bear MK3 with Bondtech extruder
Re: Unboxing, build reports, reviews... Link collection
I found 2 more videos which I believe have not been posted yet:
MAKE's take on the series built unit they received from PRUSA:
and one about the spring steel sheet with adhesive PEI film as delivered with the first units:
Re: Unboxing, build reports, reviews... Link collection
I've watched some Live Build Videos that they have trouble screwing the YZ frame without getting skewed.
You could place some heavy items (books) on the stand when screwing it together.
Then the weight would help to get the YZ frame flat.
I speculate that the apparent difficulty may be arising from some lack of squareness of the cuts on the ends of the extrusions. I plan to check each before assembly. If I find variation I will use the "most-square" ends to attach to the frame, leaving the "least-square "ends for mounting of the end plates.
Re: Unboxing, build reports, reviews... Link collection
Assembly tips
I've watched some Live Build Videos that they have trouble screwing the YZ frame without getting skewed.
You could place some heavy items (books) on the stand when screwing it together.
Then the weight would help to get the YZ frame flat.
I spent a lot of time trying to assemble my frame as accurately as possible.
I even made a wood jig to make sure the extrusion were level and sitting flat.
The X/Y Calibration finished with the "X/Y are perpendicular! Congratulations!!" message,
but sill ended up with 0.10° skew.
Re: Unboxing, build reports, reviews... Link collection
Assembly tips
I've watched some Live Build Videos that they have trouble screwing the YZ frame without getting skewed.
You could place some heavy items (books) on the stand when screwing it together.
Then the weight would help to get the YZ frame flat.
I spent a lot of time trying to assemble my frame as accurately as possible.
I even made a wood jig to make sure the extrusion were level and sitting flat.
The X/Y Calibration finished with the "X/Y are perpendicular! Congratulations!!" message,
but sill ended up with 0.10° skew.
It is literally 1/10th of a 1° 🙂 It is a level where it doesn't matter to tweak. If you loose and retighten the lm8uus from the Y carriage it will come out different. If you loosen and tighten the heatbed from the Y carriage, it will come out different. It is fine 🙂
Re: Unboxing, build reports, reviews... Link collection
It is literally 1/10th of a 1° 🙂 It is a level where it doesn't matter to tweak. If you loose and retighten the lm8uus from the Y carriage it will come out different. If you loosen and tighten the heatbed from the Y carriage, it will come out different. It is fine 🙂
Don't have my printer yet so don't know if it does this somewhere but when the company I work for provides customer facing information like this, we use keywords to group the numbers like Poor, Good, Excellent. Helps prevent a lot of support concerns ie. Measured Skew: Excellent (0.10°)
Re: Unboxing, build reports, reviews... Link collection
From the "3D PRINTING HANDBOOK" 💡
Up to 0.25° = Severe skew compensating for offset of 1.1 mm on 250 mm length
Up to 0.12° = Slight skew compensating for offset of 0.5 mm on 250 mm length
Under 0.12° = No need to compensate, X/Y axes are perpendicular. Congratulations!
Bear MK3 with Bondtech extruder
Re: Unboxing, build reports, reviews... Link collection
Another video, no comments or review, jus a black MK3 printing a benchy.
Still unbelievable how quiet the MK3 is!
Re: Unboxing, build reports, reviews... Link collection
I am starting to get really upset about the shipping of these. I ordered mine on the last day of September. Still nothing and I just had to talk to them in support about a delay now because I will be leaving for the rest of the year on holiday. How is it people that paid after me are getting these to show off in here and I havent even got a ship notice as of today?
i do plan to do a nice build review and some videos, but now its just starting to look pointless since i wont even have it before the end of the year!
Re: Unboxing, build reports, reviews... Link collection
I am starting to get really upset about the shipping of these. I ordered mine on the last day of September. Still nothing and I just had to talk to them in support about a delay now because I will be leaving for the rest of the year on holiday. How is it people that paid after me are getting these to show off in here and I havent even got a ship notice as of today?
i do plan to do a nice build review and some videos, but now its just starting to look pointless since i wont even have it before the end of the year!
From the spreadsheet it seems they've just started shipping for people who ordered on the 27th. When you say "people that paid after me", exactly who are you talking about?
Re: Unboxing, build reports, reviews... Link collection
Re: Unboxing, build reports, reviews... Link collection
3d maker noobs live build from last night (4.5hrs)
with input from Josef Prusa himself
Re: Unboxing, build reports, reviews... Link collection
For anyone interested,
I'm doing a late night live stream unbox and build right now.
I should have learned my lesson with the mk2, but I didn't... Don't build late at night.