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When using the motor x-end from the box_frame parts on a single plate build, it places the motor too close to the frame, so that it'll hit the RAMPS pcb (or atleast the protruding reset button). Moving it out by 5mm will clear the pcb.

PS. This will not affect everyone that's building this, but only when you're pigheaded like me and decide to mount the x-ends behind the z rods as done in the original (single plate) design. But even when you're not, it's awfully close to RAMPS.

Several of the holes in Prusa3ALU-FREZOVANY-v4.dxf are 3mm, when they should be 2.5 if they are to be tapped for M3

From complete-printer.scad: (correct)
http://i.imgur.com/uO5GQ6A.png

From output folder: (incorrect)
http://i.imgur.com/SSK80aW.png

Solution: mirror x-end across x axis.

A new README file should be created that explains the nature of the files contained within each subdirectory.

• There is need to completely abandon wood screw, they simply dont hold the load well.
• The Z motors are not held well enough.
• Side mounting thingies suck, wood screws tend to break the material.

So I finally got to the point of putting my belt on the Y axis and things aren't looking so good. When I tension the belt the Y motor mount is bending, which is causing the motor shaft to not be perpendicular to the belt causing the belt to wonder on the pulley.

I know it's not that the bracket isn't tight on the rods because, before printing the part, I went in and nudged the M8 radius and did test prints until hole was snug on my rods. Also, the nuts were tight on each side of it.

Is it that the mount is too thin? I'm pretty sure I have seen a version in the past that had a arm with a third mounting hole. Would adding that back help, or would it just give the motor more leverage on the bracket. Would making it thinker help? I know others have been having the same issue because I see that crappiverse has alternate brackets labeled as stronger and shims to go between the motor and the rods.

Hi, just watch the files, and on my way to figure out how the extruder get attached to the x-carriage, I see that the holes don't fit, is there an update somewhere? or did I miss something ?

I've been using the Prusa3alu-frezovany-v4.dxf file for several printers now, and there are some issues with the file:
Y-axis mounts are too high - HPB screws hit it and you can't use the LM8UU printed holders because they also contact??
The arduino holes don't line up.
I think the y-bed should have 4 bearings (personal issue)
Wasted material around y-bed, could cut out motor mounts etc.

I think the Prusa3_SC10UU-v1.dxf frame is much better design and solves many of these issues. But it isn't compatible with standard LM8UU bearings? Is there a more up to date frame file floating around? How should I go about editing a .dxf or is the .dxf file generated from some other file?

In tje readme say:
All models are in the box_frame folder, "including models for aluminium single plate". For some common configs we prepared models, see box_frame/sample_stls.

Please, if now models from single_plate are maintained in https://github.com/josefprusa/Prusa3-vanilla, remove the "including models for aluminium single plate" as it is a bit confussing.

thanks

We need complete BOM. There is sparse thingdoc info, Nathan said something about his BOM library for complete-printer.scad

With the recent commits done by @alexrj, the commit history for individual files has been wiped out. This means that it's now impossible to see who made those changes prior to his commits using the blame function and it has to be done manually by looking through the history.

I'm not sure if anyone really cares about this, but it is something worth noting. The way to fix it would be to rollback the commits and redo commit 10b5774 using the 'git mv' command instead of doing the operation with the native OS commands.

With the configuration: http://pastebin.com/EWTHf36X, the output of box_frame x-end has one of the idler_bearings coincident with the x_end_idler and x_end_motor. I just shoved things around to make it work for myself.

commit: 7da2900

I have a question: why were the teeth closed in the belt holders (y-belt-holder and x-carriage)? The original Prusa3 design had open teeth, but now it's almost impossible to fit the belt... can you enlighten me about this design choice? :)

Firstly, I don't like that the x-ends have been mirrored, as I've laid out the cables already :/ But I'm sure there are people who like it, so please make this a configuration option.

For the mirrored version, as it currently stands, you don't mirror the x-idler. The nut trap is now visible from the front of the machine, so please mirror all three parts to return the nut trap to the rear where it belongs.

I can fix this in my local copy, but it will affect others, so please keep it in mind for the next time you're doing a commit. It's an easy fix.

title says it all

The commit made by Joaz increased the width of the x-carriage and also increased the width of the extruder mounting holes to 30mm on center (increased from 24mm on center). This commit breaks the compact-extruder and dual-extruder. Solution: revert to previous version of the x-carriage or adjust the compact-extruder and dual-extruder for new hole spacing.

The lower left Arduino mounting hole needs to move down by 1.27mm in the frame.dxf file from jo-final.

Hi, just want to ask, I have printed the prusa3 master branch, and begin to print the jo-final branch, did the threaded rods on the jo-final are planned to be M4 ?

In the i2 and i3 "configuration.scad" I have never seen an option for GT2 belts (like these: http://techpaladin.com/store/#ecwid:category=1941327&mode=product&product=9001827 ).

Is there any reason?
Could it be added?

The commit made by Joaz increased the width of the x-carriage and also increased the width of the extruder mounting holes to 30mm on center (increased from 24mm on center). This commit breaks the compact-extruder and dual-extruder. Solution: revert to previous version of the x-carriage or adjust the compact-extruder and dual-extruder for new hole spacing.

Manual txt says 12 mm
configuration.scad say 16mm

Which one is correct?

No matter what I put for configuration.scad I keep getting this error message when I try to make the y-belt-holder.stl file:

Object isn't a valid 2-manifold! Modify your design.

For successful release, it's absolutely necessary to have all the files exclusively for lm8uus.

• Lot of ppl prints bad parts, with which iguses are not as smooth as they should be.
• We need to prevent part confusion from the beginning. No SAE crap etc.
• Reinvestigate possibility of printable PLA lm8uus

Which idler should be used for this extruder in the single plate version? I see an idler in the double extruder but not the single extruder and they don't appear to be compatible.

You can see an example at: https://www.bigbluesaw.com/index.php?option=com_estimator&file=X4K7-D4G6-Prusa3ALU-FREZOVANY-v4.dxf&step=diagnostic

"The quoting system detected 15 non-closed contours. Open contour lines are shown in GREEN with the endpoints highlighted as circles. A green open contour line indicates that the segments of the contour do not connect to each other."

Only two of them go through but not in the proper location of the nut traps. Two others thru-holes are missing.

It looks like there's no room to put the M8 nut on the hobbed bolt when using Wade and x-carriage from the current master branch. The hobbed bolt actually rubs on the top of the x-carriage.

I only changed i_am_box = 0 and use_fillets = 0.

How is this supposed to work? Am I missing anything?

We need template for cutting the main plate, and box build instructions for those who do not want single plate.

As the new frame for 10mm threaded rods (single_plate) does not contain holes for the foot (nor a foot piece either) I reckon frame-mount.scad is no longer needed.

Is that correct?

We need instructions for building, preferably in form of single page with pictures. Every step should have picture/photo of all needed parts and photo of assemled part.

Instructions should be in simple english. Easy to translate, no text in images.

Printer definitely needs new extruder drive mechanism.

• Gregstruder based, but less smooth carvy stuff (its pain to work with and looks gay :-))
• Smaller footprint
• ! Possiblity to mount two without big issues side by side
• ?! Compatibility with drive screws we have now

X-Carriage

• Needs to be updated to lm8uu (I think I know how, will draw later in comments)
• Needs to firmly support the extruders, what we have know is springy :-((( [nozzle and carriage are parallel, while joined only on one side, makes C shape and acts as spring]

Im trying to make parts for the single plate, and I noticed the following scad files dont match the images on the wiki page for building.

x-end-motor
x-end-idler
x-carriage

where do i get the correct files?

Hi. I am starting with 3d printing and I was unable to tighten y axis belt. So I did use: http://www.thingiverse.com/thing:462219 (I think this or something similar could be used by Prusa3).

The same is for x axis belt (printing this one: http://www.thingiverse.com/thing:247992 right now).

It is my understanding that frame slots for threaded rods need to be updated to 10.2mm as currently they are 8.2mm wide.

In y-axis-bracket.scad the module yrodbracket calls the bolt_track module at line 52 to build the void for the y brackets. These voids are for the long threaded rods of the Y axis, so shouldn't inner_radius be set to y_threaded_rod_long_r instead of threaded_rod_diameter / 2?

gregs-wade-v3.scad uses m3_nut_diameter, but I think it should use m3_nut_diameter_bigger throughout.

I have access to a waterjet cutter and laser cutter, but there's no files for the plate here.

before xmas there was a jo final then it disappeared, theres too much clutter and slight mistakes, 1. Holes on frame ideal world they should be tapped to 3mm holes so the holes need to be 2.2mm ok you can put buts behind so no biggy there 2 the dxf file for the 6mm aluminium has broken path. 3 what are the 2 holes under the y carriage on frame for is it for a alignment tool. 4 parts for single aluminum plate make a decision and have standard set and have varients in a tree instead of the main. 5 hotend this relates too another problem the photo shows a hotend im looking for to buy but cant find it so maybe update pictures.
6.in the picture shows bearing holders on the y carriage and someone had to make his own as it only just clears frame when cable tied. Maybe more detail build instructions

I'm more apt to think that it's a physics/geometry problem if an M8 rod won't fit into an 8mm hole rather than a problem in the machine that is making the part. ; )

My Harbor Freight special Pittsburgh calipers measure my VBX hardened chrome rods to me 7.99mm in diameter. The metric tap and clearance chart says to drill a 8.40mm hole to close fit M8.

Line 18, 19, and 20 of conf_bushing.scad
//z smooth rod. See note above. You can adjust it in inc/conf_bushing.scad, but the problem is likely to be in machine.
translate([-12, 7, 0]) cube_fillet([24, 13, 4.5], vertical=[3, 3, 0, 0]);
translate([0, 18, 0]) cylinder(h=2.5, r=(bushing_z[0] + 5 * single_wall_width));

busing_z[0] comes from configuration.scad. I have mine set to conf_b_lm8uu, which comes from conf_bushing.scad and is preset to [4, 7.7, 45, 0, "lm8luu bearing (double length)"]. There for busing_z[0] = 4 right?

In box_frame/doc/manual.txt, the last step says to skip to z-axis assembly below, there's a header that says ===Assemble the Z axis(P1)===, and then... nothing! Not sure most people are comfortable just wingin' it for the z-axis assembly 😜

I have realized one of the holes for fixing the compact-extruder to x-carriage is intersected by a corner and not complete. It might work but I do not think it is the intended design. I have tested with different values for hotend_groovemount_depth with similar results.

While the previous compact-extruder for PG35L motor had enough room for a MK7 (or similar) drive gear, this new one does not.

I am using something similar to this motor and drive gear: http://trinitylabs.com/products/50-1-all-metal-gearhead-stepper-147oz-in and the drive gear does not fit. Maybe I should use another one, but just in case I am opening this issue.

Could someone create a calibration.scad like i2 had?

Its nice not only for tweaking params but also saves plastic if your machine is out-a-wack and you start printing useless parts. I would try to do it but I dont understand openscad anymore then exporting stls..

Because the bed's a little lower on single plate builds, the x-axis will descend a little further down than the box build. Depending on the size of the couplings used and the way the extruder/hotend are attached, the nuttraps will hit the couplings before z=0 is reached.

When they're mirrored upside down before printing and then mounted upside down as the original singleplate parts did the nuttraps are at the top of the x-ends, clearing the couplings.

We need to find out how to make the connection between the base plate and bottom Y axis threaded rods more sturdy. Well, its good enough, but the bottom threaded rods do bend. That needs to be improved. Of course @kliment 's boxy version doesnt have that, but It isnt visually appealing, which is important these days.

I can think of something like making one of the threaded rods on Y axis longer to left side, add a bar-clamp on that which would hold threaded rod connected somewhere at the top of base plate.

The new T shaped, 3 hole holder doesn't fit the y plate from the dxf, which uses two mounting holes that are 41mm apart.

With the current x-carriage and the included extruder, hobbed bolts do not fit. The x-carriage is directly in the bolt's path, making this build impossible (see attached images).

Hi!
The idler won't fit into the x-end if you are using a 608 bearing. The x-end need to be higher.

The Readme.md refers to the build documentation for the standard box (w/o a note) which is somewhat confusing.
Additionally I couldn't find anything about this big box version, seems to be the only point in the web ;) How about a part list / rod lengths?

Hello,
Any news about Z axis mounting instructions?