This repository contains the available configuration and FAT-related files for an OWIS linear stage with a TR-Electronic LT340-S linear encoder. The stage came from the SwissFEL laser group; the user is carlo.vicario@psi.ch.
Encoder identification and published specifications
The installed encoder nameplate in Media/20260916_165615.jpg identifies TR-Electronic LT340-S, article 3200-00035, serial 0005. It states 340 mm measuring length, 0.1 µm resolution, SSI/24 bit, binary code, and 11–27 V supply. TR-Electronic also lists an LT340-S SSI catalogue variant, article 3200-00002; this is a different article number and must not be substituted for the installed unit.
| Characteristic | Manufacturer-published value | Scope |
|---|---|---|
| Measuring length | 340 mm | Installed encoder nameplate |
| Listed resolution | 0.1 µm | Installed encoder nameplate; distinct from accuracy |
| Output | SSI, 24 bit, binary | Installed encoder nameplate |
| Measurement principle | Absolute, coded glass scale | LT-S SSI family |
| Accuracy class | ±5 µm | LT-S SSI family; distinct from resolution |
| Repeatability | ≤0.2 µm | LT-S SSI family |
| SSI interface | Optocoupled clock input; RS-422 data output; 95–1000 kHz clock | LT-S SSI family |
| Supply | 11–27 V DC | Installed encoder nameplate; takes precedence over the 8–27 V LT-S family range |
| Maximum traversing speed | 2 m/s | LT-S SSI family |
| Operating temperature | 0 to +40 °C standard; −10 to +60 °C optional | LT-S SSI family, option dependent |
| Protection | IP53 standard; IP64 optional | LT-S SSI family, installation and option dependent |
Sources: installed encoder nameplate, TR-Electronic linear encoder catalogue, and TR-Electronic LT-S SSI family product data. The last page is for an LT140-S variant; its family values are not proof of installed-unit performance.
The encoder is connected directly to 24 V DC, according to the installed-system wiring information provided by the user. This is within its 11–27 V nameplate range. The ECMC files configure 24 SSI position bits, binary coding, a 1 MHz clock, and 10,000 counts/mm (0.1 µm/count). startup.cmd also contains a 9 V EL5042 supply setting, but the encoder is not powered from that output; the setting is therefore not the installed encoder supply. Confirm the actual supply voltage and wiring, count direction, and mechanical datum during commissioning before motion or FAT conclusions. See ECMC configuration.
Installed motor nameplate
The motor photo identifies a VEXTA / Oriental Motor PK245M-02B-C2, two-phase stepper, rated 6 V DC, 0.8 A, with 0.9° per full step (360° / 0.9° = 400 full steps/revolution). The ECMC motor component agrees on 0.8 A and 400 steps, but declares U_NOM_MV=48000 (48 V). The photo does not establish phase resistance, inductance, wiring, or the permissible drive supply; verify these against the exact motor documentation and installed drive before enabling motion.
