96 lines
4.1 KiB
C
96 lines
4.1 KiB
C
#ifndef _MACHINE_H
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#define _MACHINE_H
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/*
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move buffer size, in number of moves
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note that each move takes a fair chunk of ram (69 bytes as of this writing) so don't make the buffer too big - a bigger serial readbuffer may help more than increasing this unless your gcodes are more than 70 characters long on average.
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however, a larger movebuffer will probably help with lots of short consecutive moves, as each move takes a bunch of math (hence time) to set up
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*/
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#define MOVEBUFFER_SIZE 8
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/*
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axis calculations, adjust as necessary
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*/
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// XY can have lots of precision and still move speedily, so microstepping is helpful
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#define X_STEPS_PER_REV 3200.0
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#define Y_STEPS_PER_REV X_STEPS_PER_REV
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// we need far more speed than precision on Z due to the threaded rod drive, maybe just half stepping
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#define Z_STEPS_PER_REV 400.0
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#define X_COG_CIRCUMFERENCE (4.77 * 16.0)
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#define Y_COG_CIRCUMFERENCE X_COG_CIRCUMFERENCE
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// also try:
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// #define XY_COG_RADIUS 9.5
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// #define XY_COG_CIRCUMFERENCE (XY_COG_RADIUS * PI * 2)
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// this is the ratio between number of teeth on the Z motor gear, and teeth on the Z leadscrew base gear.
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#define Z_GEAR_RATIO 1.0
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// we need more torque and smoothness at very low speeds on E, maximum microstepping
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#define E_STEPS_PER_REV 3200.0
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#define EXTRUDER_SHAFT_RADIUS 5.0
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#define EXTRUDER_INLET_DIAMETER 3.0
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#define EXTRUDER_NOZZLE_DIAMETER 0.8
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// these feedrates are used during homing and G0 rapid moves
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#define FEEDRATE_FAST_XY 6000
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#define FEEDRATE_SLOW_XY 300
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#define FEEDRATE_FAST_Z 6000
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#define FEEDRATE_SLOW_Z 300
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#define FEEDRATE_FAST_E 1200
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// this is how many steps to suck back the filament by when we stop
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#define E_STARTSTOP_STEPS 20
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// extruder settings
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#define TEMP_HYSTERESIS 20
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#define TEMP_RESIDENCY_TIME 60
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/*
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calculated values - you shouldn't need to touch these
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however feel free to put in your own values if they can be more precise than the calculated approximations, remembering that they must end up being integers- floating point by preprocessor only thanks!
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*/
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#define STEPS_PER_MM_X ((uint32_t) ((X_STEPS_PER_REV / X_COG_CIRCUMFERENCE) + 0.5))
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#define STEPS_PER_MM_Y ((uint32_t) ((Y_STEPS_PER_REV / Y_COG_CIRCUMFERENCE) + 0.5))
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#define STEPS_PER_MM_Z ((uint32_t) ((Z_STEPS_PER_REV * Z_GEAR_RATIO) + 0.5))
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// http://blog.arcol.hu/?p=157 may help with this next one
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// I haven't tuned this at all- it's just a placeholder until I read the above carefully enough
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// does this refer to filament or extrudate? extrudate depends on XY distance vs E distance.. hm lets go with filament
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// #define STEPS_PER_MM_E ((uint32_t) ((E_STEPS_PER_REV / (EXTRUDER_SHAFT_RADIUS * PI * EXTRUDER_INLET_DIAMETER / EXTRUDER_NOZZLE_DIAMETER)) + 0.5))
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#define STEPS_PER_MM_E ((uint32_t) ((E_STEPS_PER_REV * EXTRUDER_NOZZLE_DIAMETER / (EXTRUDER_SHAFT_RADIUS * PI * EXTRUDER_INLET_DIAMETER)) + 0.5))
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// same as above with 25.4 scale factor
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#define STEPS_PER_IN_X ((uint32_t) ((25.4 * X_STEPS_PER_REV / X_COG_CIRCUMFERENCE) + 0.5))
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#define STEPS_PER_IN_Y ((uint32_t) ((25.4 * Y_STEPS_PER_REV / Y_COG_CIRCUMFERENCE) + 0.5))
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#define STEPS_PER_IN_Z ((uint32_t) ((25.4 * Z_STEPS_PER_REV * Z_GEAR_RATIO) + 0.5))
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#define STEPS_PER_IN_E ((uint32_t) ((25.4 * E_STEPS_PER_REV * EXTRUDER_NOZZLE_DIAMETER / (EXTRUDER_SHAFT_RADIUS * PI * EXTRUDER_INLET_DIAMETER)) + 0.5))
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// inverse, used in distance calculation during DDA setup
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#define UM_PER_STEP_X ((uint32_t) ((1000.0 / STEPS_PER_MM_X) + 0.5))
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#define UM_PER_STEP_Y ((uint32_t) ((1000.0 / STEPS_PER_MM_Y) + 0.5))
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#define UM_PER_STEP_Z ((uint32_t) ((1000.0 / STEPS_PER_MM_Z) + 0.5))
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#define UM_PER_STEP_E ((uint32_t) ((1000.0 / STEPS_PER_MM_E) + 0.5))
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// should be the same for all machines! ;)
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#define PI 3.1415926535
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/*
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firmware build options
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*/
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// this option makes the step interrupt interruptible.
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// this should help immensely with dropped serial characters, but may also make debugging infuriating due to the complexities arising from nested interrupts
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#define STEP_INTERRUPT_INTERRUPTIBLE 1
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// Xon/Xoff flow control. Should be redundant
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// #define XONXOFF
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#endif /* _MACHINE_H */
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