Imbus/grbl-imbus
1
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Dual motor support for self-squaring gantry homing.

Browse source 
- New dual motor support feature for gantry CNC machines. An axis motor is  efficiently mirrored to a dedicated set of step and direction pins (D12/D13 or A3/A4) with no detectable loss of performance. Primarily used to independently home both sides of a dual-motor gantry with a pair of limit switches (second shared with Z-axis limit pin). When the limit switches are setup correctly, Grbl will self-square the gantry (and stay square if $1=255 is programmed). Beware use at your own risk! Grbl is not responsible for any damage to any machines.

- Dual axis motors is only supported on the X-axis or Y-axis. And deletes the spindle direction(D13) and optional coolant mist (A4) features to make room for the dual motor step and direction pins.

- Dual axis homing will automatically abort homing if one limit switch triggers and travels more than 5% (default) of the non-dual axis max travel setting. For example, if the X-axis has dual motors and one X-axis triggers during homing, Grbl will abort 5% of the Y-axis max travel and the other X-axis limit fails to trigger. This will help keep any misconfigurations or failed limit switches from damaging the machine, but not completely eliminate this risk. Please take all precautions and test thouroughly before using this.

- Dual axis motors supports two configurations:

- Support for Arduino CNC shield clones. For these, step/dir on pins D12/D13, and spindle enable is moved to A3 (old coolant enable), while coolant enable is moved to A4 (SDA pin). Variable spindle/laser mode option is NOT supported for this shield.

- Support for Protoneer CNC Shield v3.51. Step/dir on pins A3/A4, and  coolant enable is moved to D13 (old spindle direction pin). Variable spindle/laser mode option IS supported for this shield.

- Added Bob's CNC E3 and E4 CNC machine defaults.
This commit is contained in:
Sonny Jeon 2019-07-30 21:51:49 -04:00
parent bb25d2f97e
commit b75e5571ee
13 changed files with 578 additions and 104 deletions
Download patch file Download diff file Expand all files Collapse all files

78
grbl/defaults.h
View file

@ -369,6 +369,84 @@
#define DEFAULT_HOMING_PULLOFF 1.0 // mm
#endif
#ifdef DEFAULTS_BOBSCNC_E3
// Grbl settings for Bob's CNC E3 Machine
// https://www.bobscnc.com/products/e3-cnc-engraving-kit
#define DEFAULT_X_STEPS_PER_MM 80.0
#define DEFAULT_Y_STEPS_PER_MM 80.0
#define DEFAULT_Z_STEPS_PER_MM 2267.717
#define DEFAULT_X_MAX_RATE 10000.0 // mm/min
#define DEFAULT_Y_MAX_RATE 10000.0 // mm/min
#define DEFAULT_Z_MAX_RATE 500.0 // mm/min
#define DEFAULT_X_ACCELERATION (500.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
#define DEFAULT_Y_ACCELERATION (500.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
#define DEFAULT_Z_ACCELERATION (300.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
#define DEFAULT_X_MAX_TRAVEL 450.0 // mm NOTE: Must be a positive value.
#define DEFAULT_Y_MAX_TRAVEL 390.0 // mm NOTE: Must be a positive value.
#define DEFAULT_Z_MAX_TRAVEL 85.0 // mm NOTE: Must be a positive value.
#define DEFAULT_SPINDLE_RPM_MAX 1000.0 // rpm
#define DEFAULT_SPINDLE_RPM_MIN 0.0 // rpm
#define DEFAULT_STEP_PULSE_MICROSECONDS 5
#define DEFAULT_STEPPING_INVERT_MASK 0
#define DEFAULT_DIRECTION_INVERT_MASK 0
#define DEFAULT_STEPPER_IDLE_LOCK_TIME 25 // msec (0-254, 255 keeps steppers enabled)
#define DEFAULT_STATUS_REPORT_MASK 1 // MPos enabled
#define DEFAULT_JUNCTION_DEVIATION 0.01 // mm
#define DEFAULT_ARC_TOLERANCE 0.002 // mm
#define DEFAULT_REPORT_INCHES 1 // true
#define DEFAULT_INVERT_ST_ENABLE 0 // false
#define DEFAULT_INVERT_LIMIT_PINS 1 // true
#define DEFAULT_SOFT_LIMIT_ENABLE 1 // true
#define DEFAULT_HARD_LIMIT_ENABLE 0 // false
#define DEFAULT_INVERT_PROBE_PIN 0 // false
#define DEFAULT_LASER_MODE 0 // false
#define DEFAULT_HOMING_ENABLE 1 // true
#define DEFAULT_HOMING_DIR_MASK 3 // move xy -dir, z dir
#define DEFAULT_HOMING_FEED_RATE 500.0 // mm/min
#define DEFAULT_HOMING_SEEK_RATE 4000.0 // mm/min
#define DEFAULT_HOMING_DEBOUNCE_DELAY 250 // msec (0-65k)
#define DEFAULT_HOMING_PULLOFF 5.0 // mm
#endif
#ifdef DEFAULTS_BOBSCNC_E4
// Grbl settings for Bob's CNC E4 Machine
// https://www.bobscnc.com/products/e4-cnc-router
#define DEFAULT_X_STEPS_PER_MM 80.0
#define DEFAULT_Y_STEPS_PER_MM 80.0
#define DEFAULT_Z_STEPS_PER_MM 2267.717
#define DEFAULT_X_MAX_RATE 10000.0 // mm/min
#define DEFAULT_Y_MAX_RATE 10000.0 // mm/min
#define DEFAULT_Z_MAX_RATE 500.0 // mm/min
#define DEFAULT_X_ACCELERATION (500.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
#define DEFAULT_Y_ACCELERATION (500.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
#define DEFAULT_Z_ACCELERATION (300.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
#define DEFAULT_X_MAX_TRAVEL 610.0 // mm NOTE: Must be a positive value.
#define DEFAULT_Y_MAX_TRAVEL 610.0 // mm NOTE: Must be a positive value.
#define DEFAULT_Z_MAX_TRAVEL 85.0 // mm NOTE: Must be a positive value.
#define DEFAULT_SPINDLE_RPM_MAX 1000.0 // rpm
#define DEFAULT_SPINDLE_RPM_MIN 0.0 // rpm
#define DEFAULT_STEP_PULSE_MICROSECONDS 5
#define DEFAULT_STEPPING_INVERT_MASK 0
#define DEFAULT_DIRECTION_INVERT_MASK 0
#define DEFAULT_STEPPER_IDLE_LOCK_TIME 25 // msec (0-254, 255 keeps steppers enabled)
#define DEFAULT_STATUS_REPORT_MASK 1 // MPos enabled
#define DEFAULT_JUNCTION_DEVIATION 0.01 // mm
#define DEFAULT_ARC_TOLERANCE 0.002 // mm
#define DEFAULT_REPORT_INCHES 1 // true
#define DEFAULT_INVERT_ST_ENABLE 0 // false
#define DEFAULT_INVERT_LIMIT_PINS 1 // true
#define DEFAULT_SOFT_LIMIT_ENABLE 1 // true
#define DEFAULT_HARD_LIMIT_ENABLE 0 // false
#define DEFAULT_INVERT_PROBE_PIN 0 // false
#define DEFAULT_LASER_MODE 0 // false
#define DEFAULT_HOMING_ENABLE 1 // true
#define DEFAULT_HOMING_DIR_MASK 3 // move xy -dir, z dir
#define DEFAULT_HOMING_FEED_RATE 500.0 // mm/min
#define DEFAULT_HOMING_SEEK_RATE 4000.0 // mm/min
#define DEFAULT_HOMING_DEBOUNCE_DELAY 250 // msec (0-65k)
#define DEFAULT_HOMING_PULLOFF 5.0 // mm
#endif
#ifdef DEFAULTS_ZEN_TOOLWORKS_7x7
// Description: Zen Toolworks 7x7 mill with three Shinano SST43D2121 65oz-in NEMA 17 stepper motors.
// Leadscrew is different from some ZTW kits, where most are 1.25mm/rev rather than 8.0mm/rev here.