diff --git a/site_ansto/instrument/kookaburra/config/motors/motor_configuration.tcl b/site_ansto/instrument/kookaburra/config/motors/motor_configuration.tcl
index 4ff27efa..511e2ef8 100644
--- a/site_ansto/instrument/kookaburra/config/motors/motor_configuration.tcl
+++ b/site_ansto/instrument/kookaburra/config/motors/motor_configuration.tcl
@@ -418,29 +418,28 @@ ss1r home 0
 
 
 # mc2: Sample Changer (Sample Stage) Z Translation
-# Gearbox 1:1
-#set samz_Home
-#set samzSetRate   25000
-#Motor samz $motor_driver_type [params \
+# Gearbox 100:1
+# 10 mm pitch
+Motor samz $motor_driver_type [params \
   asyncqueue mc2\
   host mc2-kookaburra\
   port pmc2-kookaburra\
   axis H\
   units mm\
   hardlowerlim 0\
-  hardupperlim 360\
-  maxSpeed [expr 50000.0/$samzSetRate]\
-  maxAccel [expr 25000.0/$samzSetRate]\
-  maxDecel [expr 25000.0/$samzSetRate]\
-  stepsPerX $samzSetRate\
+  hardupperlim 665\
+  maxSpeed 5.0\
+  maxAccel 5.0\
+  maxDecel 5.0\
+  stepsPerX [expr 25000.0 * 100 / 10.0]\
+  cntsPerX 819.2\
   absEnc 1\
-  absEncHome $samz_Home\
-  cntsPerX 4096]
-#samz part sample
-#samz long_name samz
-#samz softlowerlim 0
-#samz softupperlim 360
-#samz home 0
+  absEncHome 72607]
+samz part sample
+samz long_name samz
+samz softlowerlim 0
+samz softupperlim 660
+samz home 0
 
 
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