0.09mm for "Needle_arm.stl", 0.19mm for the other parts
Maximum for the articulated arms
Supports are required only for "Base_support.stl" and "Base_18x18cm_16h.stl".
Step 1: Mount some bumpers to the base frame
I suggest to apply 5 rubber bumpers under the base frame, so it will be more stable on the desk. You can use bumpers with a diameter up to 20mm.
Step 2: Assemble the PCB holders
The central part of the base consists of 4 sliding pieces arranged in a cross along which can be moved the anchoring blocks to firmly keep the printed circuit board in place. The assembly of the PCB holders to the base piece requires M5 wing nuts (5mm) and M5 hex bolts (5×12 mm). The PCB holders have two faces, one for straight sides, the other for the corners of a printed circuit board. You can choose the right face simply turning the holder.
Step 3: Assemble the articulated arms
Fit the vertical crane arm into the hole of the rotating base support, then mount the horizontal needle arm using a M4 wing nut (4mm) and a M4 hex bolt (4×10 mm).
Step 4: Insert needles soldered to an electric cable
Step 5: Add optional parts and accessories
Now that you have almost finished your customized "PCB Workstation", perhaps you would like to add a magnifying glass, or a LED lamp, or even other accessories available from my original project "PCB Workstation with Articulated Arms" (http://www.thingiverse.com/thing:801279).