CoreXY is a way of driving the X Y axis with timing belt drive. Seeby cozmicray - Developers
Looks good and hefty. It may be much simpler to run two motors on the Z-axis, one on each side. Also look into CoreXY drive for X, Y axis --- that may provide higher speedsby cozmicray - Developers
After attempting a Wally arm print twice 1 curled on ends 2 got poped off bed There has got to be a better way? A scrap chunk of wood Forsner bit just the size of 608 bearing Drill / Mill disk sander 9 minutes Wood Wally Arm Ligher than printed (unfinished-- it popped off bed)by cozmicray - Polar Machines, SCARA, Robot Arms
A purple Elmers Glue stick you can get them for $0.77 no fuss no mess just rub it on the glass PLA sticks fast!by cozmicray - General
Whole big Ordbot forum on Buildlog site!by cozmicray - Extruded Aluminum Frames
It would be nice to know what kit you have? Who supplied it? What extruder are you building? Have you tried looking at Mendalmax site: Mendalmax 1.5 instructions? # Extruder There are these stores out there ---- hardware stores they have sections with nuts, bolts, washers and hardware? Even metric hardware?by cozmicray - General
Doing a search on google or in the RepRap site can show you a lot??? search "3D printer control board" Sanguinololu is a Sanguino (arduino) work alike with Polulu drivers A RAMPS 1.4 on a adruino Mega it also uses Polulu drivers RepRap Arduino Mega Pololu Shield (RAMPS) Azteeg X3 3DP Reprap Controller w/ ATMEGA2560 RUMBA (Reprap Universal Mega Board with Allegro driver) RAMBO contby cozmicray - General
Build a Ordbot Hadron! You can find Hadron kits on eBay See Also look at: 3ders printer comparisonby cozmicray - General
Yes hole in washer just as big as acorn but not a big as hex. "As for the washer you mean put the washer over the nut as done in one of the picture, and then wire that."by cozmicray - Let's design something! (I've got an idea ...)
Rumba Where can I see more info on extruders is there a website / store?by cozmicray - Extruded Aluminum Frames
Using Marlin firmware on an arduino/RAMPS it is very easy for 3rd year university student to use the adrduino IDE and understand how to select the right parameters to do about anything they need Basic Marlin handles 2 extruders so third may be a problem. I would bet thier profs know nothing about 3Dprinting Mechanical linkages and thier use should be crux of project not building a kit This iby cozmicray - Developers
So a university 3rd year mech eng project is just to build a kit that squirts some exotic food Those British schools --- day care centers? Whats next bridge buiding with spagetti?by cozmicray - Developers
See Makibox Ramenby cozmicray - Let's design something! (I've got an idea ...)
What kind of design project is a knock off of a rep rap? 3rd year in elementry school? See the development of the Morgan, Simpson, Wally printers, SCARA arm printers? System Engineer your Printer Stakeholders, Needs, Conop, Requirements, Validation, Design, Review, Development, I&T, Verification, Delivery or you could just do it like Obamacare roll out here in the USA and have a big Tuby cozmicray - Developers
Kitchen roll? flaky biscuit, Cresent roll, pizzia dough? What kind of bed? I have a hard PC bed 200mm x 200mm 12v that heats up very fast on a RAMPS Silacone pad underneath. Sometimes I use a piece of 1/2" styrofoam on top to keep heat inby cozmicray - General
Using an encoder on motor not much help. What should be used is a linear measurement scale on each axis to give feedback to exactly where the print head is located. Precise DRO linear scales are not that expensive. and have a standard known interface.by cozmicray - General
How about using a aluminum or copper washer with holes drilled in it. The washer could provide a good way to attach heater and get heat into the acorn nut.by cozmicray - Let's design something! (I've got an idea ...)
I was wondering why you tied X axis to the cross beam instead of just moving the trolly along the Y-axis for X travel. What does tieing X-axis to frame do? X-Y travel force the trolly around -- a indirect forcing around of X-Y trolly. was this to eliminate any motors on a moving axis? Your wheels are side loaded, tearing tires off bearings, instead of normal radial loading with vertical wheelsby cozmicray - Extruded Aluminum Frames
I would think you would have TWO motors on z axis one on either side --- can't see ONE with a huge cantalever? So the extruder will hang off trolly --- taking up 4-6" of Z height? or a flange on the trolly taking up X or Y travel I wonder why the designers at Gigabot didn't design like yours oh --- they are only mechanical engineers and want to sell a $5000 machine. Please read about overby cozmicray - Extruded Aluminum Frames
How are the axes driven, belt, leadscrew? How are belts led thru system? Where are motors mounted? With trolley in center the XY axes may be over constrained and require large torque to move or forever binding How is extruder mounted? See Gigabot for design ideasby cozmicray - Extruded Aluminum Frames
Do you just hold them like a dentist and drill the little holes? I still don't see how one would drill 4 holes in the nozzle at right angles to axis and NOT drill thru the nozzle exit, when threaded attachment a no brainer?by cozmicray - Let's design something! (I've got an idea ...)
@Owens ABS or PLA Who is your supplier? What Slic3r settings? Tnxby cozmicray - Polar Machines, SCARA, Robot Arms
I got to the Github Help? How do I download the whole thing? or a whole folder? what are .ipt, .step, .sat and other files (and what will open them) Tnxby cozmicray - Polar Machines, SCARA, Robot Arms
That video is drilling center hole! That is pretty amazing video but I don't think a common acorn nut provides a smooth chamber for filament flow? Jasper is drilling 4 holes at a right angle to the center axis. and some how not piercing the center channel to attach nozzle to extruder.by cozmicray - Let's design something! (I've got an idea ...)
The A1 uses double stack stepper motors to drive screws I would guess for more torque. Have you considered this? It may be to drive the screw and the linear rail?by cozmicray - Extruded Aluminum Frames
The primary component -- the leadscrew and nut Perhaps you should build up a leadscew / nut / slider and see how it works I don't exactly know what screw/nut you intend to use Will it give you right speed / accuracy The only experience I have is watching the Trinitylabs A1 work with SIMO and 10 start screw?by cozmicray - Extruded Aluminum Frames
So? There are UV resin printers (stereolithy) out there use DLP projectors Form 1 B9Creatorby cozmicray - General
Is there an S-maker machine or kit to be had? Is it open source? Where can one get one?by cozmicray - Polar Machines, SCARA, Robot Arms
Wow FIRM Mark II Part 2 I didn't know you were teaching post grads at MIT robotics lab I thought you were a high school computer science teacher? I jest --- some amazing students -- how many fathers and uncles really do the student work? Forget about the tiltawirl , quadgodzilla, and zippity dodah and other projects for now This is what KILLED trinitylabs A1 development. Anything I can do tby cozmicray - Polar Machines, SCARA, Robot Arms