Resources and BOM: https://drdflo.com/CNC-Mill.html
Dr. D-Flo's Instagram:   / 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