Well, this is the r2.0 version of my lathe, only handly driven, but easely portable to CNC.
- Into provided CNC.ZIP you'll find all items needed to build the CNC version.
- Items in STEP and F3D format are provided for both versions.
As usual, buyers can request the link to the whole project at Tinkercad.com.
First alignment video here: https://youtu.be/TfO16oEG1MU
Second video with CNC wotking here: https://youtu.be/YZiykR4ji8k
Third video here: https://youtu.be/6G-Da1S9fOc
Fourth video (cold CNC test) here: https://youtu.be/pcWi-et-hy8
UPDATES
2022-07-05
- For brave hearts only; added a experimental rotating turret, 360° in 22.5° self-locking steps. All necessary items and instructions in ROTATE.ZIP.
2022-07-10
- uploaded 3BUTTONS.ZIP with Arduino UNO sketch to drive the Z stepper manually via 3 buttons.
2022-07-13
- uploaded Z_AXIS_CARRIAGE_BASE.STL, aimed to reinforce carriage robustness
2022-07-16
- uploaded brand new software LCD_GRBL_MEGA_2AXES.ZIP implementing LCD 2004 and SD card (see fourth video above).
Thanks to Carlos Guerrero https://github.com/cguerrero1205/LCD_GRBL
and Bart Venneker https://github.com/bvenneker/Arduino-GCode-Sender
for their wonderful work!
As previous version, it uses an easy to get motor from faulty washing machines; at today they're almost all BLDC (Brush Less Direct Current) equipped, very similar as concept to the stepper motor we're used to.
The motor I use is an Ignis WM (Nideco motor) and needs 195VDC at 310Hz for max power and speed, but it can be driven with a lower frequency (less speed and without almost any loss of its 600W power); I opted for an VFD 220V 0-400Hz 1,5KW and 50Hz seems to be good choice for speed.
Furthermore it features wonderful bearings, engineered for big radial charge, perfectly balanced rotor and, last but not least, a very quit operation.
If you however don't like BLCD motors, you can always a motor of your choice and provide it with adequate suppports and driving method.
This lathe features:
- main carriage knob to intuitive movements, 2.5:1
- reinforced and dust protected tool carriage with C-Beam profile, two sides driven
- continuously variable speed via a cheap VFD BLDC controller
- fixed tools turret with two insertion sides, 0° and 90°
- optional rotating turret 360° in 60° clicking steps
- tailstock carriage sliding with manual action, lockable in place
- can accomodate also every printed 80mm chuck
- max workable length 500 mm (with tailstock, of course...)
- very few printed items
NEW
- LCD2004 and SD card to work from files or manually move the axes (n. 1 Arduino Mega, encoder KY-040 and Arduino MicroSD card adapter)
Exploded views STL included.
I hope you like this too...
INSTRUCTIONS
Motor:
- cut away 10mm from back foots (see red parts in picture above)
- put it exactly at center of profile and place the 4 foots
- move the tailstock close to the chuck and align the chuck center to it
- tight firmly the motor and the four feet screws
- apply the 19-14mm adapter to the motor rotor
- screw in the chuck adapter plate
- with spinning motor ensure that there's absolutely no oscillation
- tight the two 19/14 adapter grubs enough to let a mark on the rotor
- remove the adapter from motor and with a 4.5mm drill bit make a little conical hole 1mm deep to each mark on the rotor, to fit the grub points
- apply again the adapter and tight well the grubs
- check again with spinning motor that there's absolutely no oscillation and eventually correct
CNC
Manual operation:
It's only necessary cut off the power to the controlling board...
Firmware:
brand new based on GRBL 1,1h, implements LCD 2004 and SD card wich lets you work directly from SD or manually move axes.
BOM
Electronics:
manual version
- n. 1 washing machine BLDC motor
- n. 1 button self-locking switch
- n. 1 safety switch
- n. 1 cheap VDF 1.5KW 3 phase controller
- n. 1 SSR relay in 220/380 out 220/380
- n. 1 10KOhm linear 10 turns potentiometer
CNC version
- n. 1 washing machine BLDC motor
- n. 1 button self-locking switch
- n. 1 safety switch
- n. 1 cheap VDF 1.5KW 3 phase controller
- n. 1 SSR relay in 220/380 out 220/380
- n. 1 I2C LCD 2004 display
- n. 1 Arduino Mega 2560 board
- n. 1 Arduino Uno board
- n. 1 Arduino Uno CNC shield
- n. 1 Arduino MicroSD module
- n. 1 KY-040 encoder
- n. 1 ON-OFF switch
- n. 2 Nema23 steppers
- n. 1 12VDC20A power supply
- n. 1 40mm fan 12VDC
- n. 2 hall proximity sensors
- n. 2 8x3mm Neodymium magnets
- n. 1 10KOhm linear 10 turns potentiometer
Mechanics:
- n. 1 K11-80 chuck
- n. 1 14mm base for K11-80
- n. 1 19mm to 14mm adapter for above chuck
- n. 1 Makita 9523 gears set, very cheap
- n. 4 Bevel gears 1.5 Modulus 20 teeth 8mm bore
Body:
- n. 1 C-Beam profile 4080 308mm
- n. 2 profiles 2080 230mm
- n. 1 profiles 2060 230mm
- n. 2 profiles 2060 70mm
- n. 2 profiles 2040 1000mm
- n. 2 profiles 2040 175mm
- n. 2 profiles 2020 807mm
Bearings:
- n. 13 608ZZ bearings
- n. 2 F6900ZZ bearings
- n. 11 M5 spacer 6mm
T8:
- n. 1 T8-2 leadscrew 770mm
- n. 1 T8-2 leadscrew 580mm
- n. 1 T8-2 leadscrew 350mm
- n. 4 T8-2 round nuts
- n. 1 T8-2 T type Opensource anti-backlash nut
Rods and bars:
- n. 1 M10x135mm threaded rod
- n. 2 rod 8x65mm
- n. 2 rod 8x45mm
Wheels:
- n. 1 threaded hex coupler M10x32mm
- n. 28 24mm Delrin wheels
- n. 14 5mm eccentric nuts
MISCELLANEOUS
- n. 1 safety switch
- n. 1 T2 loop belt 810mm
- n. 2 T2 belt timing 60 teeth 44mm OD 8mm bore
- n. 2 no teeth pulleys 5mm bore
- n. 1 5 to 8mm flexible coupler
- n. 1 10mm socket drill chuck
- n. 31 90 degrees profile locks
- n. 8 8mm collar locks
- n. 1 M10 nut
- M5 flat head screws screws
- M5 nyloc nuts
- t-nuts