A short video of Impact Engraving on hard anodized aluminium.
http://www.cooperman.talktalk.net/impact5.wmvBecause Sam made such a lovely job of producing this Wile E Coyote I just had to do it.
http://www.machsupport.com/forum/index.php/topic,12140.0.htmlThe federate was initially set a little too fast for my impact tool, which uses the mains frequency (only 50 Hz here in the UK) for it’s pulsing and I got some variations in line width on my first attempt. Reducing the federate seems to cure the problem but you can still engrave pretty quick with these little tools - they do, however, make a fearsome amount of noise !.
The impact tool used is a Burgess handheld device for which I have made a small clamp to hold it to the Z axis. It is switched on/off using the spindle relay.
Tweakie.