SeymourDumore
Diamond
- Joined
- Aug 2, 2005
- Location
- CT
OK guys, right outta the gate, I ain't in my first rodeo ....
I am getting inexplicable wire breaks just above the part.
Approx 1" above so the wire is already past the power contact and is around the diamond guide area.
The machine is a Makino U3, so by the time the wire enters the contact area, it is already submerged.
Once it gets past it, the amount of cooling water only increases, and once past the upper diamond, it is fully enveloped by the flush water.
Machine had a complete disassembly and cleaning approx 200 hours ago.
When I say disassembly, I mean if it had a screw, it was removed.
Filter is only on it's 20-th hour, so another 50-60 to go before any concern.
Water in clean tank is crystal clear so filter is not blown.
Power contact indexed 3 cutting hours ago.
Flush condition doesn't matter, but it is a sealed flush top and bottom.
There is verified power contact coolant water and plenty of it. Checked it with no wire, flush sealed and pumps-on.
Anyhow, from what I know, when wire breaks above the part it is typically not related to the "gap" condition, rather inadequate cooling of power contact/wire.
So, with my checks I have exhausted all possible options until I have a chance to rip it apart again sometime during the weekend.
The only thing I can see is that after only 3 hours of "bandsaw" cutting of 1.5" thick material, there is CONSIDERABLE wear on the upper contact.
The wear is not your typical narrow gap "abrasion", rather it is much wider ( like 3x wider), looks like it is arced rather than abraded, and the upper side of the contact
is black with burn marks .....
Bit stumped
I am getting inexplicable wire breaks just above the part.
Approx 1" above so the wire is already past the power contact and is around the diamond guide area.
The machine is a Makino U3, so by the time the wire enters the contact area, it is already submerged.
Once it gets past it, the amount of cooling water only increases, and once past the upper diamond, it is fully enveloped by the flush water.
Machine had a complete disassembly and cleaning approx 200 hours ago.
When I say disassembly, I mean if it had a screw, it was removed.
Filter is only on it's 20-th hour, so another 50-60 to go before any concern.
Water in clean tank is crystal clear so filter is not blown.
Power contact indexed 3 cutting hours ago.
Flush condition doesn't matter, but it is a sealed flush top and bottom.
There is verified power contact coolant water and plenty of it. Checked it with no wire, flush sealed and pumps-on.
Anyhow, from what I know, when wire breaks above the part it is typically not related to the "gap" condition, rather inadequate cooling of power contact/wire.
So, with my checks I have exhausted all possible options until I have a chance to rip it apart again sometime during the weekend.
The only thing I can see is that after only 3 hours of "bandsaw" cutting of 1.5" thick material, there is CONSIDERABLE wear on the upper contact.
The wear is not your typical narrow gap "abrasion", rather it is much wider ( like 3x wider), looks like it is arced rather than abraded, and the upper side of the contact
is black with burn marks .....
Bit stumped