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Prevent Z misaligment on tool change (#16518)

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Giuliano Zaro 2020-01-10 23:12:21 +01:00 committed by Scott Lahteine
parent d02a867424
commit 0391e5bcc7
1 changed files with 15 additions and 6 deletions
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17
Marlin/src/module/tool_change.cpp
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@ -929,11 +929,20 @@ void tool_change(const uint8_t new_tool, bool no_move/*=false*/) {
#elif ENABLED(SWITCHING_NOZZLE) && !SWITCHING_NOZZLE_TWO_SERVOS // Switching Nozzle (single servo)
// Raise by a configured distance to avoid workpiece, except with
// SWITCHING_NOZZLE_TWO_SERVOS, as both nozzles will lift instead.
current_position.z += _MAX(-diff.z, 0.0) + toolchange_settings.z_raise;
if (!no_move) {
#if HAS_SOFTWARE_ENDSTOPS
NOMORE(current_position.z, soft_endstop.max.z);
const float maxz = _MIN(soft_endstop.max.z, Z_MAX_POS);
#else
constexpr float maxz = Z_MAX_POS;
#endif
if (!no_move) fast_line_to_current(Z_AXIS);
// Check if Z has space to compensate at least z_offset, and if not, just abort now
const float newz = current_position.z + _MAX(-diff.z, 0.0);
if (newz > maxz) return;
current_position.z = _MIN(newz + toolchange_settings.z_raise, maxz);
fast_line_to_current(Z_AXIS);
}
move_nozzle_servo(new_tool);
#endif
@ -942,7 +951,7 @@ void tool_change(const uint8_t new_tool, bool no_move/*=false*/) {
#endif
// The newly-selected extruder XYZ is actually at...
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("Offset Tool XY by { ", diff.x, ", ", diff.y, ", ", diff.z, " }");
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("Offset Tool XYZ by { ", diff.x, ", ", diff.y, ", ", diff.z, " }");
current_position += diff;
// Tell the planner the new "current position"