CNC_V10 "Long Tall Sally" 3 motors T8-2

Here I go, again...
This is a little bit improved V9 version, but it implied several remixes and changes, so I had to publish it as new project.

It's my latest version of Ooznest OX CNC Machine (https://www.thingiverse.com/thing:1684109), well designed, very strong and well documented (I advice to go there and here and read all carefully).

You can configurate it as per your need: motor type, blower, vacuum, laser and so on.

UPDATES:
2022-10-02
Added an LCD2004, an SD reader, so you don't need anymore PC and USB cable.
Added Laser support and a blower too, having read this is the best solution to avoid black baffles on wood; not too much effective, but...
This upgrade uses an Arduino Uno to communicate with Arduino Mega.
It took a few of time to realize a simple and versatile software; I gogled around but I found only few codes, working and not working, but no one satisfied my needs.
So, a function there, a function here, I realized my own code, simple and effective.
As you can see, after job ended it resets and asks again for SD; this way you don't need tu shut down and restart.
There's anyway a little limit: on SD card must reside just one file and no directories; no one is perfect, sorry!
For laser I designed a blower too, having read this is the best solution to avoid black baffles on wood; not too much effective, but...
Al necessary items are pre-fixed with "LCD_".
Arduino code and modified library GRBL are into CODESENDER.ZIP.
Engraving video at https://dai.ly/kKOsLwtnSf1pRaySUpY

Remixes:
- X axis moved on up to avoid collisions, dust and so on
- Z operative range now is 90mm
- improved Y axis carriage
- Arduino Mega + RAMPS are now used, due to lack on spare pins on Uno + CNC shield
- added spindle motor variable speed
- added CW-CCW capability (optional, see below) to perform automatic tool changing
- a lightweight Z carriage allowing a 90mm Z height; who is interested to can find it here

Several options are available:
- Cyclone dust collector, see uploaded CYCLONE.ZIP
- a little blower, see uploaded BLOWER.ZIP
- a very simple modular ATC
- an 8-10" tablet support, see here
- support for Makita mill Chinese clone, see MAKITA_SUPPORT.ZIP
- support for cross-hair laser pointer

Included .STEP of all items, see STEP.ZIP.

Instructions
Y Axis
(see picture above)
- at exactly the center of 2060x454mm cut away an 25x20mm (HxV) portion of material
- at exactly the center of 2060x437mm drill an 10mm hole

Feet
Glue circular shape 10mm thick rubber pads into feet bottom.

INSTRUCTIONS LCD+SD
When you've to access Uno or Mega to flash firmware, you must put the switch PC/SD in PC position; this way the RX/TX lines are interrupted. This is necessary because USB and RX/TX are not to be used at same time.
Apply same above when using CNC from PC via USB.
Laser:
When using a Laser, make connections like in second schematic picture.
PWM is from D6 pin in RAMPS; it was necessary because of 5V TTL needed by laser.
In defaults.h/DEFAULTS_RAMPS_BOARD set
#define DEFAULT_LASER_MODE 1 // true

CNC:
In defaults.h/DEFAULTS_RAMPS_BOARD set
#define DEFAULT_LASER_MODE 0 // false

Software
I'd advise to use Gnea GRBL for compatibility with almost all CAM software around Read it carefully
- decompress GRBL-MEGA_5X_1L.ZIP somewhere and copy the resulting grbl_Mega directory into your Arduino IDE libraries directory
- run Arduino IDE and set board tyo Arduino Mega
- load \libraries\grbl_Uno\examples\grblUpload
- flash to board

To manage my CNC I use the friendly UniversalGcodeSender (UGS) .
I uploaded my own GRBL version, ready to be used; you can modify everything there

The optional 5mW cross-hair laser pointer may be dangerous for your eyes.
Take all precautions to avoid hazards

BOM
2020:
- n. 2 x 200mm

2040:
- n. 1 x 437mm
- n. 2 x 500mm
- n. 1 x 710mm

2060:
- n. 1 x 437mm
- n. 1 x 454mm
- n. 2 x 500mm

2080:
- n. 2 x 750mm

wheels
- n. 22 Delrin wheels 24mm
- n. 30 spacers M5x6mm
- n. 10 eccentric spacers M5
- washers M5x1mm

lead screws
- n. 1 T8 lead screw 710mm
- n. 1 T8 lead screw 465mm
- n. 1 T8 lead screw 220mm
- n. 3 T8 lead screw nuts
- n. 1 608ZZ bearing
- n. 1 688RS bearing
- n. 2 625-2RS bearing
- n. 2 608ZZ bearing
- n. 2 8mm lock collar
- n. 3 Openbuilds anti-backlash nuts

other
- n. 1 Arduino Mega + RAMPS 1.4
- n. 1 Dual H-Brifge 40A
- n. 1 power supply 12/24VDC 30A
- n. 3 Nema23
- n. 1 spindle motor OD 52mm, 200W or more, 12-24VDC
- n. 1 Chuck ER11 8mm
- n. 1 spindle collets set 13 pcs
- n. 1 Neato fan (refurbished) Aliexpress, optional (see BCB1012UH.PDF included)
- n. 1 5VDC DPDT relay module for reversing CW-CCW (optional)
- n. 5 40mm fans bearing
- n. 1 radial blower 50mm (optional)
- n. 2 Transmission Chains 20 x 15mm or bigger
- n. 1 wood workplane 706x430x20mm
- n. 3 spacers M5x35mm
- n. 6 spacers M5x23mm
- n. 1 coupler 6.35mm->8mm
- n. 2 flexible coupler 6.35mm->8mm
- n. 3 Hall effect sensors for endstops (optional)
- n. 3 8x3mm round Neodimium magnets, if used Hall sensors
- screws flat head 3mm, 4mm, 5mm, nuts, as needed
- lithium grease
- silicone oil or sewing machine oil
- Optional Laser pointer

Credits
Ooznest (https://www.thingiverse.com/thing:1684109), of course...
NitroXpress (https://www.thingiverse.com/thing:973505/files) for its nema23 cooler cover
mgx (https://www.thingiverse.com/thing:124551) for its Scad customizable cyclone separator

Layer 0.20mm
Infill 35/50%

I'd suggest to print X and Y plates with:
. nozzle 1.00mm (8hrs vs 20hrs)
. layer heigth 0.8000 mm
. infill 35%
. infill type Full Honeycomb
. top solid layers 5
. bottom solid layers 5
. outline/perimeters shells 5
. speed: 1500 mm/min (25 mm/sec)
. bed 60°
. extruder 240°

all other items:
. nozzle 0.4mm
. layer heigth 0.3000 mm
. infill 50%
. infill type Full Honeycomb
. top solid layers 10
. bottom solid layers 10
. outline/perimeters shells 10
. speed: I work at 3500 mm/min (58 mm/sec), it's up to you to decide...
. bed 60°
. extruder 205°

This way the items will be enough strong and you'll save much filament.