Sample landing preferences

Among numbers on a Values tab user can change following ones:

• Landing It - tunneling current value (in % from that was set as bearing value for scanning) that if reached stop the tip to sample landing process.
• Landing delay - number of delay cycles corresponding to singe motor step during ordinary (started by client) landing process. Usually 5000 cycles are corresponded to one second. The less the landing delay is, the faster a sample moves. However too little landing delay may cause instability in stepper motor work.
• Landing length - maximum number of stepper motor steps. If reached, it stops landing and user is asked if he wants to continue landing.
• Landing step - precision of sample positioning, observed by client.
• Draw back on every step - landing mode in which it check if it can reach the surface. During landing process before every step piezomanipulator fully retract the sample. After the step piezomanipulator returns to initial position. If during the last operation feedback become active then landing consider to be finished.
• Draw delay - delay (in DSP cycles) between steps during landing/retracting by piezomanipulator. Value 0 corresponds to absence of this delay.

• Draw stepping - value of the piezomanipulator step during landing/retracting by piezomanipulator.