Operation; Setting Resolution And Output Pulse Width - Sony Digiruler PL21 Instruction Manual

3. OPERATION

3-1. Setting Resolution and Output Pulse Width

The resolution of this detector is factory-set to 10 µm, TW 20 µs.
Shown below are the output signal specifications for factory setting.
A/B signal output specifications
Tw: Minimum phase difference: 20 µs (20 µs – 0.9 µs at PL21)
≅
100μs
4Tw: Minimum period: 80 µsec
A
B
10μ 10μ 10μ
10μm
Resolution
Up/Down pulse output specifications (PL21/PL22)
Tw
Tw
2
UP
DOWN
Minimum repeat cycle: 20 µs
Pulse width: (PL21) 10 µs + 0.9 µs
10μm 10μm
Resolution
Note
The compensation value of 0.9 µsec for the minimum phase
difference and pulse width will differ according to output load
conditions (cable length, receiving circuit of connected
device, etc.). When setting the minimum phase difference
and pulse width to 2.5 µs, adjust the output load 1 kΩ or less.
≅
(OFF)
(ON)
(OFF)
The phase difference between A output and B output is
designated as 1 count and also resolution.
Output pulse is sometimes output for every Tw even when the
(PL22) 10 µs
movement speed is slow.
(PL21)
Reverse
100μs
(ON)
19