Hi all,
Thought there might be some interest in my latest jig build. I try to explain it with pics and short words.
It's a table saw jig for tenons and box joints. It cuts single tenons, double tenons with individual spacing and boxjoints on all mm numbers larger than 4mm. In first video I said only even mm numbers but later found out it could also cut the odd ones, also boxjoints on halv mm numbers are possible.
Accuracy is better then 0.05mm and it's super fast to set up. The workpiece is clamped to a carriage, and the movement is acchieved by a large control driving a ball screw to which the carriage is connected. The pitch of the ballscrew is 4mm, backlash is less than 0.03mm and the control wheel is devided into 80 segments with holes at the ends. Pitch 4mm divided by 80 means there is 0.05mm movement between each segment of the control wheel and this is also the resolution of the system, in other words I can trim the thickness of a tenon or boxjoints in step of 0.05mm.
Coloured pins are used for positions on the control wheel where to start or finish the cut, when the pins matches a reference line on the jig. The control wheel is also equipped with a scale ring that can be zeroed in any position and is used to set the distance between the coloured pins.
The jig has customable templates/notes that keep track of the cutting process, so I don't have to count the turns of the control wheel. Coloured pins gives exact position, templates shows the bigger picture. If I made boxjoints or tenons of a certain type before, I just bring out the template and is ready to cut without test cuts or other preparations.
Set up time once used to the system is extremely short, I cut a tenon or boxjoints better than 0.05mm accuracy with a minute set up time.
Sounds very complicated in words but, this is actually a very easy to use jig.