br928
02-21-2011, 02:19 PM
I am building an indexer for my engraving machine. This allows me to engrave cylindrical objects like glasses and bottles with a diamond bit.
This could easily be scaled up for use on the ShopBot.
I used a NEMA 23 10:1 planetary gearbox but NEMA 34 is also available in 5:1 and 10:1 ratios.
Using XL timing belt and pulleys I have a final ratio of 20:1. This is the ratio the manufacturer uses on the accessory they offer.
I didn’t have any ½” Aluminum on hand but had some ½” Micarta left over from a previous job. This stuff cuts like wood and almost has the strength of aluminum. A lot of custom knife makers use this material for handles. It’s very tough and waterproof. I have to use water when rotary engraving glass with a diamond bit so I needed a material that was waterproof.
I still have to design the tailstock.
Designed and toolpathed with Aspire and cut with the ShopBot.
This could easily be scaled up for use on the ShopBot.
I used a NEMA 23 10:1 planetary gearbox but NEMA 34 is also available in 5:1 and 10:1 ratios.
Using XL timing belt and pulleys I have a final ratio of 20:1. This is the ratio the manufacturer uses on the accessory they offer.
I didn’t have any ½” Aluminum on hand but had some ½” Micarta left over from a previous job. This stuff cuts like wood and almost has the strength of aluminum. A lot of custom knife makers use this material for handles. It’s very tough and waterproof. I have to use water when rotary engraving glass with a diamond bit so I needed a material that was waterproof.
I still have to design the tailstock.
Designed and toolpathed with Aspire and cut with the ShopBot.