some mods omny doc

docs/user/ptychography/omny.md

@@ -44,28 +44,18 @@ Now that the sample is aligned, the tomographic measurement can be performed.
 1. `omny.tomo_scan_projection(angle)` perform a ptychographic scan at the rotation angle <angle>, e.g. at zero degrees. When happy with the scan parameters launch the tomographic measurement by `omny.tomo_scan()`.
 1. Before changing to the next sample sample, verify that all subtomograms were completely acquired using the `tomo_recons matlab` script.
 
-#### If something went wrong…
+### If something went wrong…
 Special cases:
-If something got stuck and no errors
-umv otransy 0
-_otransfer_gripper_to_park_z
-If the gripper fails (vertical movement)
-ctrl+C if it is stuck
-try moving up and down a bit (umvr otransy .5), potentially requires a ctrl+C again if stuck
-umv otransy -1.5
-_otransfer_gripper_to_park_z
-if this happened after a sample was mounted the storage might not be updated
-to do this manually
-GRIPPER
-otransfer_modify_samples 0 110 0/1
-SAMPLE STAGE 0 0 0/1
-otransfer_modify_samples
-For closing the shield at the parking station
-_otransfer_shield_close(1)
+If the gripper or another stage got stuck during transfer. Ctrl+c and then
+`umv(dev.otransy, -1.5)` followed by 
+`omny._otransfer_gripper_to_park_z()`, which will move the gripper to its parking position.
 
+If the above fails for the vertical movement of the gripper _Ctrl+C_. 
+Try moving up and down a bit `umvr(dev.otransy,0.5)`, `umvr(dev.otransy,-0.5)`, potentially requires a _ctrl+C_ again if stuck.
+Then, `umv(dev.ootransy,-1.5)` followed by 
+`omny._otransfer_gripper_to_park_z()`, which will move the gripper to its parking position.
 
-
-Oeye out in xray in
+If this error happens after a sample was mounted or unmounted, it is important to chech that the sample storage is correct `omny.otransfer_storage()`.
 
 ### Sample storage and transfer