The use of secondary encoders on all of a robots axes, as well as the use of linear encoders for positioning the robot relative to the workpiece, enables a level of accuracy at the tool center point
Industrial Robots: Encoders for Tool Center Point Accuracy
Contributed by | HEIDENHAIN
Accuracy is impaired by many factors
Step 1: highly dynamic motor control
Step 2: secondary encoders for highly accurate position measurement
Step 3: accurate position measurement for movable robots
Conclusion: highly-accurate position measurement improves accuracy at the tool center point
|ECA 4000||ECI 4000||WMR|
|Scanning principle||Absolute, Optical||Absolute, Inductive||Incremental, inductive|
|Inside diameter||70 mm to 512 mm||90 mm / 180 mm||60 mm to 10 000 mm|
|Resolution||29 bits||20 bits||Depends on the subsequent electronics|
|System accuracy||±2“||±25“ / ±40“||±3“ per meter of arc length|
|Resistance to contamination||+||++||++|
The content & opinions in this article are the author’s and do not necessarily represent the views of ManufacturingTomorrow
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A Rare American Builder of Large Machine Tools With ‘Strong Bones’ Adds a Superior Control to Bring New Benefits to Many
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