magneticanomaly
Titanium
- Joined
- Mar 22, 2007
- Location
- On Elk Mountain, West Virginia, USA
I have a Master Appliance heat gun. Old, heavy duty, American-made. I love to fix and use such things.
Won't run.
Field windings show around 30 ohms each. Sounds like a probably okay range.
Armature is OPEN between ANY combination of commutator bars. I assume continuity should exist between diametrically-opposite pairs of bars? The armature looks clean, no discoloration of (green) varnish. Where I delicately scraped varnish away from wires near bars, have continuity between bar and wire.
Manufacturer has told me that a new armature for unit so old is not available, and the new model will not fit. They won't show me a drawing so I can see if I can make it fit, they say the new one is not electrically compatible, will not tell me details. Certainly a waste of their time as well as mine.
Obviously I have already spent more time on this than the cost of a lovely new Chinese throwaway heat-gun. (New Master $108, new Chinese $20-$50)
Just seems unlikely that EVERY coil is burned open, and none shorted, somewhere inside the armature, with no sign of distress at the surface.
Am I missing something real obvious?
Thanks to any who join me on this fool's errand, pleased to be of service to any who just want to laugh.
Won't run.
Field windings show around 30 ohms each. Sounds like a probably okay range.
Armature is OPEN between ANY combination of commutator bars. I assume continuity should exist between diametrically-opposite pairs of bars? The armature looks clean, no discoloration of (green) varnish. Where I delicately scraped varnish away from wires near bars, have continuity between bar and wire.
Manufacturer has told me that a new armature for unit so old is not available, and the new model will not fit. They won't show me a drawing so I can see if I can make it fit, they say the new one is not electrically compatible, will not tell me details. Certainly a waste of their time as well as mine.
Obviously I have already spent more time on this than the cost of a lovely new Chinese throwaway heat-gun. (New Master $108, new Chinese $20-$50)
Just seems unlikely that EVERY coil is burned open, and none shorted, somewhere inside the armature, with no sign of distress at the surface.
Am I missing something real obvious?
Thanks to any who join me on this fool's errand, pleased to be of service to any who just want to laugh.