/* config.h - compile time configuration Part of Grbl Copyright (c) 2009-2011 Simen Svale Skogsrud Copyright (c) 2011-2012 Sungeun K. Jeon Grbl is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Grbl is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Grbl. If not, see . */ #ifndef config_h #define config_h // IMPORTANT: Any changes here requires a full re-compiling of the source code to propagate them. #define BAUD_RATE 9600 // Define pin-assignments #define STEPPING_DDR DDRD #define STEPPING_PORT PORTD #define X_STEP_BIT 2 // Uno Digital Pin 2 #define Y_STEP_BIT 3 // Uno Digital Pin 3 #define Z_STEP_BIT 4 // Uno Digital Pin 4 #define X_DIRECTION_BIT 5 // Uno Digital Pin 5 #define Y_DIRECTION_BIT 6 // Uno Digital Pin 6 #define Z_DIRECTION_BIT 7 // Uno Digital Pin 7 #define STEPPERS_DISABLE_DDR DDRB #define STEPPERS_DISABLE_PORT PORTB #define STEPPERS_DISABLE_BIT 0 // Uno Digital Pin 8 #define LIMIT_DDR DDRB #define LIMIT_PIN PINB #define LIMIT_PORT PORTB #define X_LIMIT_BIT 1 // Uno Digital Pin 9 #define Y_LIMIT_BIT 2 // Uno Digital Pin 10 #define Z_LIMIT_BIT 3 // Uno Digital Pin 11 #define LIMIT_INT PCIE0 // Pin change interrupt settings #define LIMIT_INT_vect PCINT0_vect #define LIMIT_PCMSK PCMSK0 #define SPINDLE_ENABLE_DDR DDRB #define SPINDLE_ENABLE_PORT PORTB #define SPINDLE_ENABLE_BIT 4 // Uno Digital Pin 12 #define SPINDLE_DIRECTION_DDR DDRB #define SPINDLE_DIRECTION_PORT PORTB #define SPINDLE_DIRECTION_BIT 5 // Uno Digital Pin 13 #define COOLANT_FLOOD_DDR DDRC #define COOLANT_FLOOD_PORT PORTC #define COOLANT_FLOOD_BIT 0 // Uno Analog Pin 0 // #define ENABLE_M7 // Mist coolant disabled by default. Uncomment to enable. #ifdef ENABLE_M7 #define COOLANT_MIST_DDR DDRC #define COOLANT_MIST_PORT PORTC #define COOLANT_MIST_BIT 1 // Uno Analog Pin 1 #endif // Define runtime command special characters. These characters are 'picked-off' directly from the // serial read data stream and are not passed to the grbl line execution parser. Select characters // that do not and must not exist in the streamed g-code program. ASCII control characters may be // used, if they are available per user setup. Also, extended ASCII codes (>127), which are never in // g-code programs, maybe selected for interface programs. // TODO: Solidify these default characters. Temporary for now. #define CMD_STATUS_REPORT '?' #define CMD_FEED_HOLD '!' #define CMD_CYCLE_START '~' #define CMD_RESET 0x18 // ctrl-x // Specifies the number of work coordinate systems grbl will support (G54 - G59). // This parameter must be one or greater, currently supporting up to a value of 6. #define N_COORDINATE_SYSTEM 1 // The temporal resolution of the acceleration management subsystem. Higher number give smoother // acceleration but may impact performance. // NOTE: Increasing this parameter will help any resolution related issues, especially with machines // requiring very high accelerations and/or very fast feedrates. In general, this will reduce the // error between how the planner plans the motions and how the stepper program actually performs them. // However, at some point, the resolution can be high enough, where the errors related to numerical // round-off can be great enough to cause problems and/or it's too fast for the Arduino. The correct // value for this parameter is machine dependent, so it's advised to set this only as high as needed. // Approximate successful values can range from 30L to 100L or more. #define ACCELERATION_TICKS_PER_SECOND 60L // Minimum planner junction speed. Sets the default minimum speed the planner plans for at the end // of the buffer and all stops. This should not be much greater than zero and should only be changed // if unwanted behavior is observed on a user's machine when running at very slow speeds. #define MINIMUM_PLANNER_SPEED 0.0 // (mm/min) // Minimum stepper rate. Sets the absolute minimum stepper rate in the stepper program and never runs // slower than this value, except when sleeping. This parameter overrides the minimum planner speed. // This is primarily used to guarantee that the end of a movement is always reached and not stop to // never reach its target. This parameter should always be greater than zero. #define MINIMUM_STEPS_PER_MINUTE 800 // (steps/min) - Integer value only // Number of arc generation iterations by small angle approximation before exact arc trajectory // correction. This parameter maybe decreased if there are issues with the accuracy of the arc // generations. In general, the default value is more than enough for the intended CNC applications // of grbl, and should be on the order or greater than the size of the buffer to help with the // computational efficiency of generating arcs. #define N_ARC_CORRECTION 25 // Integer (1-255) // Time delay increments performed during a dwell. The default value is set at 50ms, which provides // a maximum time delay of roughly 55 minutes, more than enough for most any application. Increasing // this delay will increase the maximum dwell time linearly, but also reduces the responsiveness of // run-time command executions, like status reports, since these are performed between each dwell // time step. Also, keep in mind that the Arduino delay timer is not very accurate for long delays. #define DWELL_TIME_STEP 50 // Integer (1-255) (milliseconds) // Number of homing cycles performed after when the machine initially jogs to limit switches. // This help in preventing overshoot and should improve repeatability. This value should be one or // greater. #define N_HOMING_CYCLE 2 // Integer (1-128) // --------------------------------------------------------------------------------------- // FOR ADVANCED USERS ONLY: // Toggles XON/XOFF software flow control for serial communications. Not officially supported // due to problems involving the Atmega8U2 USB-to-serial chips on current Arduinos. The firmware // on these chips do not support XON/XOFF flow control characters and the intermediate buffer // in the chips cause latency and overflow problems with standard terminal programs. However, // using specifically-programmed UI's to manage this latency problem has been confirmed to work. // As well as, older FTDI FT232RL-based Arduinos(Duemilanove) are known to work with standard // terminal programs since their firmware correctly manage these XON/XOFF characters. In any // case, please report any successes to grbl administrators! // #define ENABLE_XONXOFF // Default disabled. Uncomment to enable. // Creates a delay between the direction pin setting and corresponding step pulse by creating // another interrupt (Timer2 compare) to manage it. The main Grbl interrupt (Timer1 compare) // sets the direction pins, and does not immediately set the stepper pins, as it would in // normal operation. The Timer2 compare fires next to set the stepper pins after the step // pulse delay time, and Timer2 overflow will complete the step pulse, except now delayed // by the step pulse time plus the step pulse delay. (Thanks langwadt for the idea!) // This is an experimental feature that should only be used if your setup requires a longer // delay between direction and step pin settings (some opto coupler based drivers), as it may // adversely effect Grbl's high-end performance (>10kHz). Please notify Grbl administrators // of your successes or difficulties, as we will monitor this and possibly integrate this as a // standard feature for future releases. However, we suggest to first try our direction delay // hack/solution posted in the Wiki involving inverting the stepper pin mask. // NOTE: Uncomment to enable. The recommended delay should be > 3us and the total step pulse // time, which includes the Grbl settings pulse microseconds, should not exceed 127us. // #define STEP_PULSE_DELAY 5 // Step pulse delay in microseconds. Default disabled. // --------------------------------------------------------------------------------------- // TODO: The following options are set as compile-time options for now, until the next EEPROM // settings version has solidified. This is to prevent having to support dozens of different // incremental settings versions. #define BLOCK_DELETE_ENABLE 0 // Block delete enable/disable flag during g-code parsing // This parameter sets the delay time before disabling the steppers after the final block of movement. // A short delay ensures the steppers come to a complete stop and the residual inertial force in the // CNC axes don't cause the axes to drift off position. This is particularly important when manually // entering g-code into grbl, i.e. locating part zero or simple manual machining. If the axes drift, // grbl has no way to know this has happened, since stepper motors are open-loop control. Depending // on the machine, this parameter may need to be larger or smaller than the default time. // NOTE: If the define commented, the stepper lock will be disabled upon compiling. // -> NOW INSTALLED IN SETTINGS #define STEPPER_IDLE_LOCK_TIME 25 // (milliseconds) - Integer > 0 #endif