Appendix F. Approach
The R9 Software can be configured to control many different approach systems. Information about the
requirements of each approach system can be found in this Appendix as well as details on how to
configure each system.
There are several different behaviors that are commonly desired in an approach system:
• Single Step In, Single Step Out: The approach system will decrease or increase the tip-sample
separation by one coarse step. An STM tip can be pulled away from the sample to help protect it during
coarse motion.
• Fast In: The Fast In Procedure is used to rapidly approach the tip to the sample. There will be no
feedback checks during the Fast In so it is important to monitor the tip-sample separation (perhaps
with a camera) while this Procedure is running.
Important
There are no feedback tests during the Fast In Approach Procedure!. The tip-sample
separation must be monitored by a camera and must be stopped manually!
The Approach Procedure will be highlighted on the Approach Procedure Panel while the
Procedure is running. Selecting the Approach Procedure again will stop the approach.
• Fast Out: The Fast Out Procedure is used to rapidly retract the tip from the sample by a predefined
number of steps.
• *Slow Approach*: This is the typical Approach Procedure to use when the probe is closer to the
sample. The tip can be pulled back between the coarse approach steps to help protect it from
accidental contact with the sample.
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