GXSM / Bugs / #139 LM dz resets

#139 LM dz resets

Milestone: None

Status: closed

Owner: nobody

Labels: None

Priority: 5

Updated: 2014-11-10

Created: 2012-09-02

Creator: willpaul

Private: No

I have been looking at the LM feature, and noticed something which doesn't seem right. The dx and dy settings work as one would expect -- when executed the XYs signals are moved by that vector from wherever they currently are. The dz does this properly one time. Then on subsequent times it immediately jumps back to the place it started from last time... Seems a very dangerous feature. I imagine the following scenario:

LM set to dz = 20 to retract the tip a bit
Feedback on, surface found... more experiments
LM set to dz = 20 to do the same thing

This results in immediately poking the tip into the sample because of the "memory" of where it had moved from before, then it does the desired LM.

Hope this might be a quick fix :)

Will

Discussion

Percy Zahl - 2013-04-08

not sure what to do here -- seams special. use no repeat...

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Percy Zahl - 2013-06-27

dz is problematic in particular what to do if feedback is on or is getting re enabled?

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Percy Zahl - 2014-11-10

status: open --> closed

Group: -->
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Percy Zahl - 2014-11-10

LM mode received a major overhaul -- now LM / VP program.

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LM dz resets

Scanning Probe Microscopy Controller and Data Visualization Software

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#139 LM dz resets

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