Tinkering the Ivan Miranda Big Printer to a smaller version (Completed) by 3D_PP

Last crawled date: 3 years ago

The original design of this printer lays in the hands of Ivan Miranda.
More info about this printer design can be found here https://ivanmiranda.com/?p=1645
No doubt to say, we love this design due it's simplicity in configuration and build. Thumbs up for Ivan.
As this is a very BIG printer, 300 x 600 x 300 mm, we at 3D Prototype Printing decided to adjust a bit of the dimensions, 300 x 300 x 500 mm, as that suits us more.
Using the B.O.M. posted by Ivan, we simply redone the numbers of the posted lengths towards the rods, the 20 x 20 x 1.5 mm square aluminum extrusions and the M8 Lead screw to get what we needed.
Either we made a mistake in the mats, or the print area is not 300 x 600 mm posted.
We came out (after the build) on 195 x 295 mm with a height of 450 mm,
20 mm should be added in the y direction, 105 mm + the size of the carriage should be added to the x direction (about 185 mm). and 50 mm into the z direction
Note: If you going to make use of the new type "Bed holder" then the Z direction only needs to be corrected with 20 mm.
As we wanted to have this printer in prototype state, we opted for cheaper materials.
For example, the smooth rods have been replaced with chromed stainless steel pipes of 12mm, the x bridging has been replaced with an aluminum 8mm rod. The bed is made out of wood, yes, no metal as we don't use a heated bed. Still, we most likely stay with the wooden bed, or a printed version for it with use of extra insulation materials.
After cutting all materials to length and printing all the posted parts from his Fusion 360 link https://myhub.autodesk360.com/ue29ae852/g/shares/SH7f1edQT22b515c761eda136a61687c5365 we started to build the printer.
On his website he wrote about using this Fusion 360 to update all his parts. We came to the conclusion that this was not fully true. During his build he made adjustments to the printer that did not show up in this build. But that didn't matter as some of his adjustments are on his webpage (link above).
We noticed, after printing the Y-Carriage, the holes for the LM12UU were like 1 mm to large, strange as he used his screwdriver to hammer them in, ours just made use of the gravity, Tinkering was needed to get this printer going like we wanted it to go, after all we had almost all the parts available.
One thing that we were missing was a holder for the filament stepper, already posted here https://www.thingiverse.com/thing:2630201.
Ivan his design of the bed is of a massive weight, 2 times 6 mm aluminum plate, 3 cork layers, a 300 x 600 mm mirror, 2 heat beds of 300 x 300 mm and 2 solid state relays mounted to the bottom of the print bed. (HEAVY)
We wanted to go light so that is why we used the wood. Problem we got with that is, it is shaking all over the place do not enough weight, though we stick on the wood for now and see if we can come to a solution. (already redesigned a few parts for it)
First of all this:
Parts that you can print straight of the original build.
This list shows the parts we used without any adjustments, off course you can print all the originals from Ivan his design as we did also to start with.
Overall list of original parts, used by 3DPP:
T2020 20x needed
E2020 20x needed
Bracket front (2 parts for power supply)
Bracket back (2 parts for power supply)
LCD Screen (4 parts including the reset knob)
Arduino Ramps Controler (2 parts)
End Stop Support (Limit Switch) (2 parts) (Probably will be updated for Dual Z- Limit Switch Support)
X-Axis parts (Although those parts are called Y-, from my point of view, the position / placing of the LCD makes those X- related)
Y-Guide Bracket Motor (2 parts, part for X-axis motion of the Y-axis, holds the dual axis NEMA 17, locking the X-axis)
Y-Guide Bracket (1 part, holds the 608 bearing to guide the rod coming from Y-Guide Bracket Motor, locking the X-axis (use Y-Guide Bracket Upper))
Y-Guide Bracket Upper (1 part (3x needed) to clamp the 12 mm X-Axis rods in place)
Bracket Tensioner (1 part, Part to lock the 12 mm X-Axis (use Y-Guide Bracket Upper) and the GT2 Belt Tensioner)
Bracket Tensioner mirror (1 part, Part to lock the 12 mm X-Axis (use Y-Guide Bracket Upper) and the GT2 Belt Tensioner)
Belt Tensioner (3x needed)
Y-Axis parts
Bridge Motor Side (1 part, the top part of the bridge that holds the NEMA in place)
All other parts of the Y-Axis are modified.
Still you can print all the originals, all up to you.
Z-Axis parts
The Z-Axis consist out of 4 parts, the motor holder (2x needed), the clamp for the motor holder (2x needed), the bed holder (2x needed) and the clamp for the guide rail on the bottom (4x needed).
Point of attention:
If you donwload the files from Fusion 360, the motor holder and the clamp for the motor holder missing the hole to lock the guide rail in place.
Only part we used:
Clamp Guide Rail Bottom (4x needed)
All other parts of the Z-Axis are modified.
Still you can print all the originals, all up to you.
We will frequently update this page (until done) with all the updates.
So for all that are making this printer or planning to make this printer, those updates might be useful to you.
Note: All settings posted are the settings we used, feel free if you want to change them to make it more stirdy.
The updates:

Reducing the M8 Lead screw wobbling: added a holder to the bottom with an extra 608 bearing (3 Parts to print, 0.2 layer, 40% infill, no rafts, no supports)
z-axis 12mm centering guide bottom bearing (print laying on the side)
z-axis 12mm centering guide bottom
z-axis 608zz locker (any 608 will do)


Avoiding running out of the M8 nut from the Bed Plate Holder on long Z-Axis travel (minor update if you use the original Bed Plate Holder)
Nut Lock Plate (2x needed) 0.2 layer, 100% infill, no rafts, no supports)


Guide rod holder for Z-Axis to replace the Limit Switch Holder (preparing for dual Z limit Switch)
axis holder 12mm 35 mm inside frame (1x needed) 0.2 layer, 20% infill, no rafts, no supports)
Axis holder 12mm 35mm outside frame with cable tray (1x needed) 0.2 layer, 20% infill, no rafts, no supports)
Limit Switch holder to fit on 35 mm axis holder (2x needed if you go for dual Z Limit Switch) 0.2 layer, 100% infill, no rafts, no supports)


Replacement for the Bed Holders, those will replace the ones that are shown in post 2. Switching from 1 guided rod to 2 guided rods on the Z-Axis.
Bed holder (2x needed 0.2 layer, 30% infill, no rafts, no supports)
M8 Nut holder (2x needed 0.2 layer, 100% infill, no rafts, no supports)


Spool Holder, we need a spool holder. Despite there are a zillion on TV, i could not find one made for the 20 x 20 mm square tube, also needs to be able to hold a 300 mm spool.
20 x 20 clamp for spool holder (2x needed) 0.2 layer, 20% infill, no rafts, no supports)
Spool Holder (1x needed) 0.2 layer, 30% infill, no rafts, no supports)


X-Motor carriage: Changed to have a better alignment when locking the rods in place and a clamp mechanism to have the belt more secure and easier mounting. The LM12UU has a very snug fit.
X-carriage Bridge Motor side (1x needed) 0.2 layer, 30% infill, no rafts, no supports)
Cable holder V2 right hand side (1x needed per X-carriage 0.2 layer, 100% infill, no rafts, no supports)
Cable holder V2 left hand side (1x needed per X-carriage 0.2 layer, 100% infill, no rafts, no supports)


X-carriage Bridge Pulley side. Changed to have a better alignment when locking the rods in place and a clamp mechanism to have the belt more secure and easier mounting. The LM12UU has a very snug fit.
X-carriage Bridge Pulley side (1x needed) 0.2 layer, 30% infill, no rafts, no supports)
Cable holder V2 right hand side (1x needed per X-carriage 0.2 layer, 100% infill, no rafts, no supports)
Cable holder V2 left hand side (1x needed per X-carriage 0.2 layer, 100% infill, no rafts, no supports)


Y-Carriage. Changed to carry 30 mm fan mounting spots (extruder + part cooling). The LM12UU has a very snug fit. Designed to fit a Heatsink of 31 / 32 mm in max height (Total height of all the cooling ribs). The part cooling fan positioned at the bottom need to be slide in from the side, only 2 screws needed to keep it in place.
Y-Carriage (1x needed) 0.2 layer, 40% infill, no rafts, supports needed, see photo's)
Y-Carriage Belt clamp (2x needed 0.2 layer, 100% infill, no rafts, no supports)
E3D Clamp (1x needed 0.2 layer, 100% infill, no rafts, no supports)

NOTE
For the Y-Carriage, print it at 30 mm/s.
The last photo shows the carriage after a 5 and a half hour print on 205 C. Yes, it is just PLA.
Raw, non calibrated printer Benchy test as result after all the updates. Printed at 0.2 layer @ 60 mm/s.
Done
In case we come up with more updates, we will off-course post them.
3DPP wish all the people that are building or planning on building this printer "Happy Printing"