76ab1b6a42
- G38.2 straight probe now supported. Rough draft. May be tweaked more as testing ramps up. - G38.2 requires at least one axis word. Multiple axis words work too. When commanded, the probe cycle will move at the last ‘F’ feed rate specified in a straight line. - During a probe cycle: If the probe pin goes low (normal high), Grbl will record that immediate position and engage a feed hold. Meaning that the CNC machine will move a little past the probe switch point, so keep federates low to stop sooner. Once stopped, Grbl will issue a move to go back to the recorded probe trigger point. - During a probe cycle: If the probe switch does not engage by the time the machine has traveled to its target coordinates, Grbl will issue an ALARM and the user will be forced to reset Grbl. (Currently G38.3 probe without error isn’t supported, but would be easy to implement later.) - After a successful probe, Grbl will send a feedback message containing the recorded probe coordinates in the machine coordinate system. This is as the g-code standard on probe parameters specifies. - The recorded probe parameters are retained in Grbl memory and can be viewed with the ‘$#’ print parameters command. Upon a power-cycle, not a soft-reset, Grbl will re-zero these values. - Moved ‘$#’ command to require IDLE or ALARM mode, because it accesses EEPROM to fetch the coordinate system offsets. - Updated the Grbl version to v0.9d. - The probe cycle is subject to change upon testing or user-feedback.
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
|
|
probe.c - code pertaining to probing methods
|
|
Part of Grbl
|
|
|
|
Copyright (c) 2014 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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "system.h"
|
|
#include "probe.h"
|
|
|
|
|
|
// Probe pin initialization routine.
|
|
void probe_init()
|
|
{
|
|
PROBE_DDR &= ~(PROBE_MASK); // Configure as input pins
|
|
PROBE_PORT |= PROBE_MASK; // Enable internal pull-up resistors. Normal high operation.
|
|
}
|
|
|
|
|
|
// Monitors probe pin state and records the system position when detected. Called by the
|
|
// stepper ISR per ISR tick.
|
|
// NOTE: This function must be extremely efficient as to not bog down the stepper ISR.
|
|
void probe_state_monitor()
|
|
{
|
|
if (sys.probe_state == PROBE_ACTIVE) {
|
|
if (!(PROBE_PIN & PROBE_MASK)) {
|
|
sys.probe_state = PROBE_OFF;
|
|
memcpy(sys.probe_position, sys.position, sizeof(float)*N_AXIS);
|
|
sys.execute |= EXEC_FEED_HOLD;
|
|
}
|
|
}
|
|
}
|