debug in motutils : use steps_per_unit sign

id11/motutils.py

@@ -71,7 +71,7 @@ def mot_findref(axis):
         ref_pos = axis.home_found_dial()
     elif refcfg["search"] == "HOME":
         dial_pos = axis.dial
-        if dial_pos - refcfg["dial"] > 0:
+        if (dial_pos - refcfg["dial"])> 0 and (axis.steps_per_unit > 0):
             home_dir = -1
         else:
             home_dir = 1