We've had a few questions on how to use the ER-series Tension/Compression Tapping Heads. Here's a short Fab Lab Skill Builder Video with some tips for success.
Check out the revised technical document, CNC tapping Guidelines for a detailed programming discussion with examples. Here are the TTS ER Tap holders we are using, if you're interested in getting one of these to try out:
Also, here's our previous Fab Lab Video on using the Procunier TruTap Auto-Reversing Tapping Head