sMA6 encoder mode to CHECK

after Oksana experienced that it works

cfg/main/ma6_cfg.py

@@ -74,7 +74,7 @@ Mod('om',
     'frappy_psi.phytron.Motor',
     'stick rotation, typically used for omega',
     io='om_io',
-    encoder_mode='NO',
+    encoder_mode='CHECK',
     target_min=-180,
     target_max=360,
 )