53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
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/*
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solenoid_pen.h
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Part of Grbl_ESP32
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copyright (c) 2018 - Bart Dring This file was modified for use on the ESP32
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CPU. Do not use this with Grbl for atMega328P
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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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Usage notes:
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This is designed to use a solenoid to lift a pen.
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When the current Z location is below zero the pen is down
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If the Z goes to zero or above the pen goes up.
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There are two power levels, the initial pull up strength, then the hold strength
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Note: There is a still a virtual Z axis that has a finite speed.
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If your gcode is commanding long travels in Z, there will be delays
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between solenoid states as the Z "travels" to the location that will
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change the state.
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*/
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#define SOLENOID_PWM_FREQ 5000
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#define SOLENOID_PWM_RES_BITS 8
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#define SOLENOID_TURNON_DELAY (SOLENOID_TIMER_INT_FREQ/2)
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#define SOLENOID_PULSE_LEN_UP 255
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#define SOLENOID_HOLD_DELAY (SOLENOID_TIMER_INT_FREQ/2) // in task counts...after this delay power will change to hold level
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#define SOLENOID_PULSE_LEN_HOLD 80 // solenoid hold level ... typically a lower value to prevent overheating
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#define SOLENOID_TIMER_INT_FREQ 50
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#ifndef solenoid_h
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#define solenoid_h
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void solenoid_init();
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void solenoid_disable();
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void solenoidSyncTask(void *pvParameters);
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void calc_solenoid(float penZ);
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#endif
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