For SWM1B-01 and SWM2B-01, EncoderWorks can configure a custom compatible replacement solution when the installed system requires compact short-stroke draw-wire displacement conversion, bellows-protected cable entry, encoder-mounted drum rotation, flange model 58 compatibility, 200 mm drum scaling, and the correct 1 m or 2 m measuring range to remain unchanged. The main failure boundary is a small-range linear feedback system that may still rotate the encoder shaft but produce wrong travel values, cable slack, spring instability, end-of-stroke contact, or unstable position feedback if the range, cable path, drum scaling, deflection angle, or encoder mounting interface is changed. Typical production lead time: 15 working days.
These models belong to the SWM cable-type displacement converter platform for use with absolute or incremental encoders. SWM1B-01 is the 1 m version with bellows protection and basic flange model 58 configuration. SWM2B-01 uses the same compact device concept with a 2 m measuring range. Unlike the 5 m version, both short-range versions use a 200 mm nominal drum circumference, so replacement work must focus on stroke scaling, cable tension, cable exit direction, and encoder-to-distance conversion rather than simply matching the external housing.
System Limits
The first limit is short-stroke range and drum scaling. SWM1B-01 uses a 1 m measuring range, while SWM2B-01 uses a 2 m measuring range; both belong to the 200 mm nominal drum-circumference group. If a 1 m unit is replaced by a 2 m unit without checking the controller scaling, or if a 2 m machine receives the shorter range version, the system may show proportional position error, limited travel, early end-of-range contact, or incorrect zero-position behavior even when the encoder output appears normal.
The second limit is cable path, bellows entry, and compact installation. Both versions require the cable speed, 15 N / 30 N draw-force boundary, cable tension, 20° permissible deflection angle, housing IP64 boundary, and cable-entry IP54 boundary to remain compatible with the installed machine. Poor cable alignment, snap-back, excessive side pull, contaminated cable entry, wrong flange fit, or a forced housing position can cause cable wear, spring stress, unstable winding on the drum, water or dust ingress, and reduced service life.
Wiring & Installation
Before replacement, verify whether the machine uses the 1 m or 2 m range, the encoder type, flange model 58 mounting, cable exit direction, bellows condition, and controller scaling. The converter and encoder should be checked together because the mechanical drum motion determines how the encoder output represents linear travel.
During installation, mount the housing rigidly to the stationary machine part and attach the cable eyelet to the moving part without twisting or side-loading the cable. The cable exit should face downward or sideways where possible, and the cable may deflect only within the allowed angular boundary. Keep the cable under tension, prevent sudden release, and avoid routing it through areas with chips, dust, water spray, or mechanical impact unless suitable protection is added.
Custom Compatible Solution
EncoderWorks can configure the replacement around the installed SWM draw-wire interface:
- Match SWM1B-01 or SWM2B-01 range selection, 200 mm drum circumference, and encoder conversion ratio
- Preserve B bellows protection, cable exit orientation, flange model 58 mounting, and compact housing geometry
- Review 8 m/s cable speed, 15 N / 30 N draw-force boundary, 20° deflection angle, and cable tension behavior
- Confirm IP64 housing use, IP54 cable-entry exposure, controller scaling, short-stroke repeatability, and end-of-travel clearance before shipment
Key Data
| Item | SWM1B-01 | SWM2B-01 |
|---|---|---|
| Device type | Cable-type displacement converter | Cable-type displacement converter |
| Measuring range | 1 m | 2 m |
| Conversion method | Linear cable travel to encoder shaft rotation | Linear cable travel to encoder shaft rotation |
| Drum circumference | 200 mm nominal | 200 mm nominal |
| Accessory / cable entry | B, with bellows | B, with bellows |
| Version | 01 basic version for flange model 58 | 01 basic version for flange model 58 |
| Permissible cable speed | Max. 8 m/s | Max. 8 m/s |
| Cable draw force | 15 N max start, 30 N max end | 15 N max start, 30 N max end |
| Cable material | Stainless steel 1.4401 | Stainless steel 1.4401 |
| Cable diameter | 0.55 mm nominal | 0.55 mm nominal |
| Fleet angle | 20° in all directions | 20° in all directions |
| Approx. mass | 1.0 kg | 1.0 kg |
| Protection class | Housing IP64, cable entry IP54 | Housing IP64, cable entry IP54 |
| Key replacement checks | 1 m range, 200 mm drum scaling, flange 58 fit, cable exit, short-stroke tension, IP boundary | 2 m range, 200 mm drum scaling, flange 58 fit, cable exit, short-stroke tension, IP boundary |
