diff --git a/site_ansto/instrument/bilby/config/anticollider/anticollider.tcl b/site_ansto/instrument/bilby/config/anticollider/anticollider.tcl
index db8cb21a..9638485d 100644
--- a/site_ansto/instrument/bilby/config/anticollider/anticollider.tcl
+++ b/site_ansto/instrument/bilby/config/anticollider/anticollider.tcl
@@ -2,6 +2,27 @@
 
 source $cfPath(anticollider)/anticollider_common.tcl 
 
+namespace eval ::anticollider {
+  set guide_posit 1
+  set aperture_posit 2
+  set ap100X100_posit 1
+  set coltol 0.1
+  set aptol 0.1
+
+  for {set n 1} {$n < 8} {incr n} {
+    foreach {col ap} "col$n ap$n ap$n col$n" {
+      set col_limit [expr [SplitReply [$col posit2unit $aperture_posit]] - $coltol]
+      set ap_limit [expr [SplitReply [$ap posit2unit $ap100X100_posit]] - $aptol]
+      set acrule [subst {forbid {-inf inf} for $ap when $col in {-inf $col_limit} }]
+      lappend ::anticollider::prog $acrule
+      clientput $acrule
+      set acrule [subst {forbid {-inf inf} for $col when $ap in {-inf $ap_limit} }]
+      lappend ::anticollider::prog $acrule
+      clientput $acrule
+    }
+  }
+}
+
 # NOTE: This is called with a list of motorname target pairs
 proc ::anticollider::enable {args} {
   if {[SplitReply [::anticollider::protect_detector]] == "false"} {
@@ -11,4 +32,3 @@ proc ::anticollider::enable {args} {
   }
 }
 
-::anticollider::loadscript acscript.txt