Gallery, Projects and General > Oooops!
A Moments Inattention
awemawson:
I've been setting up to make some work clamps for the wire edm machine out of 304 stainless steel. Simple single hole tapped M8 and an 8 mm slot. Needed a few so drew it up in Featurecam to make on the CNC mill.
To set tool lengths my 'zero tool' is a Heidenhain touch probe so the procedure is:
A/ Use Heidenhain Probe to set Z = 0 as top of Vertex Z-Gauge (controller automates this)
B/ Set each tool length measured to top of Vertex Z-Gauge (led lights up on contact) then put values into the 'Tool Table'
C/ Use Heidenhain Probe to reset Z=0 to be the top of the work piece
awemawson:
Now this process works spiffingly if you remember to do ALL the steps :bugeye:
Yesterday in a moment of inattention I failed to do the last step - probe the work piece. Result being that instead of being the top of the work piece, Z=0 is now 47mm BELOW the work piece.
Generally this isn't considered good, and most definitely the first tool to be used, a centre drill, was most unhappy being asked to enter a good way into a piece of 304 stainless that it was only supposed to go in 0.5 mm !
Net result was one heck of a big bang, the stepped jaws being sheared off the vice, the centre drill disintegrating, and the BE200 / CAT40 collet holder being consigned to history
awemawson:
Now those HT socket cap screws are M8 and sheared clean off - what force does that take? Not surprisingly the control reported a 'Gross Positioning Error' but amazingly after a reset, other than the damage shown in the photos the Z servo and bearing SEEM to have survived
A bit of tidying up and sorting out, and a replacement holder installed and calibrated resulted in the first SS EDM Clamp - but this sort of happening is not really wanted :scratch:
Nine more clamps to go.
John Stevenson:
Clumsy bastard
awemawson:
I very nearly added that comment myself John as I just KNEW that'd you'd be along shortly :ddb:
Andrew
Navigation
[0] Message Index
[#] Next page
Go to full version