2 Hold the steel plate parallel and directly above the anchor while rotating the anchor in the tester (pic. 7.26). If the anchor is deformed as a result of a short circuit, the steel plate (blade) will vibrate and be attracted to the core. In this case, replace the anchor.
Pic. 7.26. Armature winding short circuit test
Attention! Before installation, the surface of the anchor must be cleaned.
3. Check the insulation between the commutator segment and the armature winding core (pic. 7.27). If there is no electrical conductivity, the insulation is fine.
Pic. 7.27. Insulation test between commutator segment and armature winding core
4. Check if there is electrical conductivity between the individual segments (pic. 7 28).
Pic. 7.28. Checking the electrical circuit of the armature winding