FoldaRap Build Manual
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- 1,5 mm hexagonal wrench (for the pulleys grub screw)
- 2 mm hexagonal wrench (for M3 counterksunk bolts and pneumatic fittings "MA-12-03-M5")
- 2,5 mm hexagonal wrench (for normal M3 cap-head bolts and the rounded M4 bolts used for the frame)
- a flat screwdriver (for the psu's screw terminals)
- s small screwdriver (to set the drivers current)
You may need also :
- a 5,5mm flat spanner or a small pliers (for m3 nuts)
- something to cut wires, and strip them (knife, automatic striper, etc.)
- a lighter for the heat-shrink sleeves
- soldering iron (to eventually solder the endstops)
- small files (round, flat) to eventually ream the printed parts
- a glue gun (gluing the endstop on the printed part is easier/quicker than using bolts)
- a multimeter (to set the drivers current)
The build manual for the FoldaRap 1 is here.
- Read the whole manual once or twice before starting, to get an overview of the build
- Basically we have a main frame and several sub-assemblies, some can be done in parallel : gather your friends and establish a record for minimum building time ! (Actual best record : 4 hours)
- Work on a cutting mat if you have one, it will protect your table plus they often show a millimetre grid that will be useful to check the bolts length (with some experience you will recognize them just by looking or holding one).
- Place you mouse over a picture in a list if you wonder what part it is
- In case of doubt, don't hesitate to have a look at the 3d model in Sketchup (before/during the build), even if about a next version of the machine it will show you the folded/unfolded state of the machine and you can play around with it :)
Ok let's start It should take approximately 12 hours to put everything together. From step 1 to 4 : 2-4 hours
Know the parts
Firstly, have a look at all the part and learn what everything is.
How to insert a T-nut
A part of the wiring depend of the combination of electronic board and power supply, for other version : FoldaRap_power-supplies
Z-Left / Z-Right
Different kind of power supply have been used in FoldaRap builds, if you don't recognize yours look at this page : FoldaRap power-supplies
Anyway, the principle is always 1) bolt the power supply on the plate, 2) then the plate on the base of the frame
there should be no play between the nuts and the printed part, too much play will cause Z backlash, but the rod should turn easily, if the nuts are too tightened it constraint the movement of the rod (the open space allow the rod to eventually wobble without transferring it to the part, as you can see on this video )
Top-frame (need update)
Great ! You are almost done !
Have a pause, you need to be relaxed for the next step, or you can also just head to the end :)
- see also the emaker huxley hotend
- thermistor wires : +/- 75cm
- fan : prolongated to match +/- 75cm
- printed plate
- 2* m3x8
- 2* m3x25
Now lets plug everything to the board !
Look at the Minitronics_10 page, it is well documented and the wiring should be quite easy with the male/female connectors.
Setting the drivers current
- The drivers seems to use the same voltage reference as for a pololu (so we need to tune them between 0.4 - 0.5 V )
Depending of the motor and it's use :
- 1A Nema 14 (like LDO) : 0.4v for the axis and a little more (0.45v) for the extruder
- 1.25A Nema 14 (HY0006) : 0.5v for the axis
- 0.8A Nema 14 (HY0007) : 0.32v for the extruder, it may need a little more
- cut wires
- solder wires
- in place
glued on the side
- thermistor (blue 75cm)
- heater (red 75cm)
- fan : on a 12v pin (must be always on)
- printed-part cooling fan: if the hotend's fan is alway on, this one is controlled by the electronic board via the "cooling fan" screw terminal (turned on by sending Mcode "M106 Sxxx" (xxx being between 0 and 255), turned off by "M107" but Slic3r automate this)
- Cooling the Minitronics_10's PCB is mandatory according to RichRap in RepRap Magazine 2:
The PCB is used as a heatsink and must be cooled from the underside with a 40mm fan or bigger, this is important to do with such a compact board.
Finish by this one, as it is moving, the wires need to be above all the other wires.
- heater element (the two thicker wires)
- spiral wrapping band : for the wires that came out of the base.
Tighten the belt by closing the loops with zip-ties, then trim everything (video of belt tensioning )
Tape (5-10 min)
- Kapton (polyimide) or blue tape (= outside masking tape, uv resistant usually with acrylic adhesive, PLA stick well to acrylic)
Making the bed parallel and zeroing
The Z-zero is made when making the bed parallel to the nozzle.
- Start by roughly makin it parallel
- then move the nozzle to the lowest point
- and adjust the 3 screws to move it regarding that height (by turning them until the homing move stop lowering the bed)
- repeat on each corners so the zero is exactly when the nozzle stop touching the bed (true for the four corners+center)
- I like to start with the Y direction with the two bolts, then with the remaining one
"Bad" (the bolts need to be tightened)
- Once the plan is set from left to right you can check front/end
- after that it's supposed to be parallel but may need few more tweaks that will be revealed by observing the first layer of a print
- Skeinforge : you will only have to add a little offset (altitude), to have the desired height for the first layer, usually the same as your layer height.
- Slic3r : leave z-offset at 0, it will add one layer height automatically (you still may have to adjust it slightly to fine tune the Z-zero, depending on where your endstop have been glued).
Another advantage of that : by moving to the center of the bed from the zero height, the nozzle is also wiped by the side of the bed from any purged plastic ;-)
Go go go first print !!!
This article will probably help you along your first print :)
Also have a look at the User Manual