James Roettger
Elite Cafe Member
Here is a cup holding jig I made from a carpenter's cabinet clamp and a large rubber stopper to act as a pad against the inside bottom of the cup. I used tape and bits of wood to expand the pad of the cabinet clamp for better holding of the cup. Note the use of adhesive putty to back the area to be engraved. Adding the spot of adhesive putty makes a huge difference in the amount of vibration experience when using a pneumatic engraver. The tool cuts deeper and substantially easier with the putty added. The little plastic bag inside the cup is to help keep the inside in like new condition and prevent scratches.