Difference between switch logfile and checkpoint

Hi All,
what is the difference between
Forcing log file switches:
ALTER SYSTEM switch logfile;
and
ALTER SYSTEM checkpoint;
when i should use one and not use the other
Thanks very much

I don't know that checkpoint will increase the scn. In a way it can be called correct but there are multitudes of SCN floating around. For example, for the matching of the datafiles and controlfles, there are two scn's which are used, stop scn and checkpoint scn. Than for the block, there can be , commit scn , transaction scn , High scn and low scn. There is one counter that is there for both checkpoint and SCN and checkpoint number is generated from SCN itself. I am sure that there is a missing link here some where but still, to some extent this is correct.
Checkpointing is an event which happens at certain conditions and SCN is always there, just like in a clock, there is always a time.
HTH
Aman....

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http://help.sap.com/saphelp_nw70ehp1/helpdata/en/26/4bc0417951d117e10000000a155106/frameset.htm
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I suspect that the behavior you are experiencing has today
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Example Setup
Stepper
Motor
NI
Motion Controller
10
steps per encoder pulse (Every 10 steps the controller gets an encoder
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The
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controller sends out 9 pulses.
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motor moves to position 9.
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The
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controller sends out 9 pulses.
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steps per revolution.
Turn
off pull-in moves by setting them to 0 in MAX.
Use an
open loop configuration.
Play
around with the pull in window in MAX.
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