General Catalog - DR. JOHANNES HEIDENHAIN GmbH - #19

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19 HEIDENHAIN-SPECTO Length Gauges Accuracy ± 1 ìm Thanks to their very small dimensions, the HEIDENHAIN-SPECTO length gauges are the product of choice for multipoint inspection apparatus and testing equipment. Plunger actuation The length gauges of the ST 12x8 and ST 30x8 series feature a spring-tensioned plunger that is extended at rest. In the pneumatic length gauges ST 12x7 and ST 30x7 the plunger is retracted to its rest position by the integral spring. It is extended to the measuring position by application of compressed air. Mounting The HEIDENHAIN-SPECTO length gauges are fastened by their 8h6 standard clamping shank. Incremental ST 1288 ST 1287 ST 1278 ST 1277 ST 3088 ST 3087 ST 3078 ST 3077 Measuring standard DIADUR glass scale Incremental signals » 1 VPP « TTL » 1 VPP « TTL Signal period 20 ìm 4 ìm, or 2 ìm 20 ìm 4 ìm, or 2 ìm System accuracy ± 1 ìm Recommended measuring step 1 ìm to 0.2 ìm Measuring range 12 mm 30 mm Plunger actuation ST 12x8/ST 30x8: by measured object ST 12x7/ST 30x7: pneumatic Degree of protection IP 64 Reference mark One