ffcc3470a3
- Significant improvements in the planner. Removed or reordered repetitive and expensive calculations by order of importance: recalculating unchanged blocks, trig functions [sin(), cos(), tan()], sqrt(), divides, and multiplications. Blocks long enough for nominal speed to be guaranteed to be reached ignored by planner. Done by introducing two uint8_t flags per block. Reduced computational overhead by an order of magnitude. - Arc motion generation completely re-written and optimized. Now runs with acceleration planner. Removed all but one trig function (atan2) from initialization. Streamlined computations. Segment target locations generated by vector transformation and small angle approximation. Arc path correction implemented for accumulated error of approximation and single precision calculation of Arduino. Bug fix in message passing.
54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/*
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motion_control.h - high level interface for issuing motion commands
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Part of Grbl
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Copyright (c) 2009-2011 Simen Svale Skogsrud
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Modifications Copyright (c) 2011 Sungeun (Sonny) Jeon
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Grbl is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Grbl is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Grbl. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef motion_control_h
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#define motion_control_h
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#include <avr/io.h>
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#include "planner.h"
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// NOTE: Although the following functions structurally belongs in this module, there is nothing to do but
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// to forward the request to the planner.
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// Execute linear motion in absolute millimeter coordinates. Feed rate given in millimeters/second
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// unless invert_feed_rate is true. Then the feed_rate means that the motion should be completed in
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// (1 minute)/feed_rate time.
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#define mc_line(x, y, z, feed_rate, invert_feed_rate) plan_buffer_line(x, y, z, feed_rate, invert_feed_rate)
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#define mc_set_current_position(x, y, z) plan_set_current_position(x, y, z)
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#ifdef __AVR_ATmega328P__
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// Execute an arc in offset mode format. position == current xyz, target == target xyz,
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// offset == offset from current xyz, axis_XXX defines circle plane in tool space, axis_linear is
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// the direction of helical travel, radius == circle radius, clockwise_sign == -1 or 1. Used
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// for vector transformation direction.
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void mc_arc(double *position, double *target, double *offset, uint8_t axis_0, uint8_t axis_1,
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uint8_t axis_linear, double feed_rate, uint8_t invert_feed_rate, double radius, int8_t clockwise_sign);
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#endif
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// Dwell for a couple of time units
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void mc_dwell(uint32_t milliseconds);
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// Send the tool home (not implemented)
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void mc_go_home();
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#endif
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