A clamp to hold down material to a knife table

Settings for Finger Joints

style style of the fingers
surroundingspacesmaximum space at the start and end in multiple of normal spaces
edge_widthspace below holes of FingerHoleEdge
fingerwidth of the fingers
playextra space to allow finger move in and out
spacespace between fingers
widthwidth of finger holes

LaserClamp Settings

minheightminimal clamping height in mm
maxheightmaximal clamping height in mm
extraheightextra height to make operation smoother in mm

Default Settings

thicknessthickness of the material
format format of resulting file
tabswidth of tabs holding the parts in place in mm (not supported everywhere)
debug print surrounding boxes for some structures
labels label the parts (where available)
referenceprint reference rectangle with given length (zero to disable)
burnburn correction in mm (bigger values for tighter fit). Use BurnTest in "Parts and Samples" to find the right value.

You need a tension spring of the proper length to make the clamp work. Increace extraheight to get more space for the spring and to make the sliding mechanism less likely to bind. You may need to add some wax on the parts sliding on each other to reduce friction.