Changes

* Edge finding - The process of using an edge finder to align the coordinate system of the mill with the corner of your part.   

* Edge finding - The process of using an edge finder to align the coordinate system of the mill with the corner of your part.   

* Collet - A device that forms a collar around an object to be held and exerts a strong clamping force on the object when it is tightened. On the mill the collet is attached to the spindle and is used to hold cutting tools in place.   

* Collet - A device that forms a collar around an object to be held and exerts a strong clamping force on the object when it is tightened. On the mill the collet is attached to the spindle and is used to hold cutting tools in place.   

==== [https://www.hardinge.com/wp-content/uploads/KneeMill-Complete-Manual.pdf User Manual] ====

==== [https://www.hardinge.com/wp-content/uploads/KneeMill-Complete-Manual.pdf User Manual] ====

==== Overview ====

==== Overview ====

When making a part, it can usually be milled in several different ways and as a result this will focus on general operations such as changing tools, starting and stopping the spindle, changing speeds, and changing gears. To learn how to mill the specific part for the demonstration see the video below. <gallery widths="250" heights="250">

When making a part, it can usually be milled in several different ways and as a result this will focus on general operations such as changing tools, starting and stopping the spindle, changing speeds, and changing gears. To learn how to mill the specific part for the demonstration see the video below. The first thing you will need to do is properly secure your work piece in the vice. Place the piece in between the jaws and turn the handle clockwise to tighten. If the piece is to small to protrude from the top of the vice use a set of parallels to raise the work piece above the vice. This makes it easy to face the work piece without damaging the vice. Next you will need to insert a tool. To insert a cutting tool under the new system, push the tool upwards into the collet with one hand and then push quill handle up with the other to compress the spring above the collet. Pushing up on the quill handle will allow the the tool to slide up into the collet and the tool will lock in place once the handle is lowered. A decent amount of force is required to compress the spring so don't be afraid to push hard. To release the tool, hold it in one hand while pushing up on the quill handle and then pull it out once the spring is compressed. You are then ready to begin machining. Use the spindle start-stop switch to turn on the mill. You will notice an option for high or low on the switch. If the mill is in high gear, the high setting will run the spindle forward (clockwise) and the low setting will run the spindle in reverse. If the mill is in low gear, the opposite will occur. If you are not sure what gear the mill is in look at the high-low lever to determine the gear (check out the images below to see the location of the switches). Once the mill is on you will need to adjust the spindle speed to match your material by referring to the speed chart on the wall above the mill and turning the spindle speed hand wheel till the speed is correct. Only adjust the speed while the machine is ON. You may need to switch gears to achieve the proper speed. Do this by rotating the high-low range lever from the current gear to the desired gear. Do not force the lever into place if there is resistance; instead use your other hand to slightly twist the spindle so that the range lever slides into place. After the machine is on, use the axes adjustment handles and the digital display to mill your part. Feel free to ask a shop supervisor for specifics or best milling processes for your part.  <gallery widths="250" heights="250">

File:MillOn.png

File:MillOn.png

File:MillSpeed.png

File:MillSpeed.png

====General Procedure====

====General Procedure====

This video contains specific information for using the Mills in the Maker Hub as well as a basic overview of what will be expected in your live demonstration. {{#evu:https://www.youtube.com/watch?v=IJjXAxYH9TA}}Note that the tool changing system has been upgraded since this video was made. To insert a cutting tool under the new system, push the tool upwards into the collet with one hand and then push quill handle up with the other to compress the spring above the collet. Pushing up on the quill handle will allow the the tool to slide up into the collet and the tool will lock in place once the handle is lowered. A decent amount of force is required to compress the spring so don't be afraid to push hard. To release the tool, hold it in one hand while pushing up on the quill handle and then pull it out once the spring is compressed.  

This video contains specific information for using the Mills in the Maker Hub as well as a basic overview of what will be expected in your live demonstration. {{#evu:https://www.youtube.com/watch?v=IJjXAxYH9TA}}Note that the tool changing system has been upgraded since this video was made. To insert a cutting tool under the new system, push the tool upwards into the collet with one hand and then push quill handle up with the other to compress the spring above the collet. Pushing up on the quill handle will allow the the tool to slide up into the collet and the tool will lock in place once the handle is lowered. A decent amount of force is required to compress the spring so don't be afraid to push hard. To release the tool, hold it in one hand while pushing up on the quill handle and then pull it out once the spring is compressed.  

== Safety ==

== Safety ==