Dfift correction attempts

gauge_vid6008.py

@@ -75,6 +75,7 @@ class Gauge:
 
         self._current_step = 0
         self._zeroed = False
+        self._last_dir = None
 
     def zero(self):
         overrun = _OVERRUN_STEPS
@@ -128,9 +129,18 @@ class Gauge:
         self._pin_step.value(0)
         utime.sleep_us(delay_us)
 
-    def steps_toward(self, value, limit=5):
-        """Return the step delta needed to move toward value, clamped to ±limit."""
-        delta = self._val_to_step(value) - self._current_step
+    def steps_toward(self, value, limit=5, deadband=0.5):
+        """Return the step delta needed to move toward value, clamped to ±limit.
+
+        deadband: If error is less than this fraction of one step, return 0 to prevent
+        micro-corrections due to floating-point rounding. Default 0.5 means
+        no movement if error < half a step.
+        """
+        target_step = self._val_to_step(value)
+        delta = target_step - self._current_step
+        deadband_steps = deadband
+        if abs(delta) < deadband_steps:
+            return 0
         return max(-limit, min(limit, delta))
 
     def get(self):