stepper: Support for multiple steppers controlling a single axis

Allow multiple steppers to be defined for a single cartesian axis.
This adds support for dual-z setups.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/config/example-extras.cfg b/config/example-extras.cfg
index 97183b7c..67b725b4 100644
--- a/config/example-extras.cfg
+++ b/config/example-extras.cfg
@@ -27,6 +27,24 @@
 #   activation.
 
 
+# Multi-stepper axes. On a cartesian style printer, the stepper
+# controlling a given axis may have additional config blocks defining
+# steppers that should be stepped in concert with the primary
+# stepper. One may define any number of sections with a numeric suffix
+# starting at 1 (for example, "stepper_z1", "stepper_z2", etc.).
+#[stepper_z1]
+#step_pin: ar36
+#dir_pin: ar34
+#enable_pin: !ar30
+#step_distance: .005
+#   See the example.cfg for the definition of the above parameters.
+#endstop_pin: ^ar19
+#   If an endstop_pin is defined for the additional stepper then the
+#   stepper will home until the endstop is triggered. Otherwise, the
+#   endstop will home until the endstop on the primary stepper for the
+#   axis is triggered.
+
+
 # Heater cooling fans (one may define any number of sections with a
 # "heater_fan" prefix). A "heater fan" is a fan that will be enabled
 # whenever its associated heater is active. In the event of an MCU