Power Drawbar and Tool Offsets (DIY CNC Mill Upgrades 2)

Video Description

Resources and BOM: https://drdflo.com/CNC-Mill.html Dr. D-Flo's Instagram: https://www.instagram.com/dr.dflo/ D-Flo’s Amazon Store: https://www.amazon.com/shop/dr.d-flo Supplies/Products: Power Drawbar Kits: https://geni.us/Priest-Tools Common tools and supplies: https://dflo.info/Amazon Touch Plates and probe: Manual (paid link): https://geni.us/Manual-Touch-Plate Digital (paid link): https://geni.us/Digital-Touch-plate ITTP Digital Probe: https://geni.us/ITTP-Probe Tormach TTS Holders: https://geni.us/Tormach-TTS Video Description: This is the second installment in the Dr. D-Flo’s CNC mill upgrade series. In this video, a power drawbar (i.e., pneumatic drawbar) is installed to automate the loading and unloading of tools. Dr. D-Flo explains how a powerful air cylinder and Belleville washers (also known as spring washers) work against each other to hold the tool tightly when cutting but freely release the end mill during a tool change. The power drawbar not only increases the speed of switching out end mills, drills and other tooling, but also provides a strong and constant holding force of 32 ft-lbs to ensure that the tool holder is properly seated and does not slip during the cutting operation. Speaking of tool holding, Dr. D-Flo also explains the magic behind the Tormach Tool System (TTS) holders, which have allowed for mills with R8 spindles to be used as effective CNC machines. The TTS holders maintain the length of the cutting tools between operations, allowing for seamless transitions between tools. At the end of the video, Dr. D-Flo demonstrates how to find the length of a digital probe and cutting tools through both analog and digital touch plates. Table of Contents: 00:00 - Introduction 03:18 - Power Drawbar Operating Principle 04:08 - Priest Tools' Kit 05:55 - Belleville Washers 05:55 - Installing and Tensioning Drawbar 10:48 - Mounting the Air Cylinder 12:55 - Floating Assembly 14:11 - Electronics and Pneumatic Tubing 16:02 - Flipping the Switch! 17:01 - TTS Holders 18:55 - Tool Height Offsets #CNC #Mill #Automatic