implmex
Diamond
- Joined
- Jun 23, 2002
- Location
- Vancouver BC Canada
Good morning All:
I had a weird new problem this morning I've never seen before.
I'm wire cutting a simple rectangular cutout in a 4140 round shaft.
All went well for the first 0.050" then I started getting wire breaks occasionally, then the cut stalled and I got wire shorts.
I look at the slot and it's welded shut!!
I can't even get a skinny shim in or run a piece of wire through.
So I cut the offending chunk away from another direction, cut through the welded bit, and then popped out the slug.
Attached is a photo.
Look at the funny little lump glued to the side of the slug at the top of the photo
I've never seen this before.
The wire was recently maintained, water conductivity is good, power contacts have been indexed: it ran like a bunny yesterday.
Any one seen anything like this before?
Any theories as to why?
It's running just fine now...noodling along as expected and I'm totally stumped.
Cheers
Marcus
Implant Mechanix • Design & Innovation > HOME
Vancouver Wire EDM -- Wire EDM Machining
I had a weird new problem this morning I've never seen before.
I'm wire cutting a simple rectangular cutout in a 4140 round shaft.
All went well for the first 0.050" then I started getting wire breaks occasionally, then the cut stalled and I got wire shorts.
I look at the slot and it's welded shut!!
I can't even get a skinny shim in or run a piece of wire through.
So I cut the offending chunk away from another direction, cut through the welded bit, and then popped out the slug.
Attached is a photo.
Look at the funny little lump glued to the side of the slug at the top of the photo
I've never seen this before.
The wire was recently maintained, water conductivity is good, power contacts have been indexed: it ran like a bunny yesterday.
Any one seen anything like this before?
Any theories as to why?
It's running just fine now...noodling along as expected and I'm totally stumped.
Cheers
Marcus
Implant Mechanix • Design & Innovation > HOME
Vancouver Wire EDM -- Wire EDM Machining