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Most ShopBot tools are equipped with proximity switches that trigger at the ends of travel. There is a routine in the ShopBot software that uses these switches to home the tool to your 0, 0 location. This routine is labeled C3, and can be located two different ways. The first is to go to the Cuts dropdown in the Command Console and then select C3>Home X Y Axes Using Prox Switches. The routine will move each axis in the negative direction until it triggers the proximity switch for that axis. Once it has triggered the switch it will back off and position itself in your home location, then zero itself there. The second way to run the C3 homing routine is to click on the shortcut tile within the Red Position Window with the X and Y letters next to arrows.
C3 Shortcut Tile
This routine uses offsets which are programmable via a different routine. The offsets are easy to reprogram should you ever need to change the home position of the tool, and want that home position to be where the C3 goes to when it is run. As an important note this home position is what all Automatic Toolchanger tool locations are based off of, so if you change these offsets then you will need to recalibrate the toolholder locations, if you are using an Automatic Toolchanger.
Here is how to calculate the offsets for the C3 routine.
First, move the tool into position with your keypad, set it to where you want your 0,0 location to be as exact as you can get it. A vee bit or tapered ballnose bit, something with a fine tip, will make it easier to more accurately position the tool for this location.
After it is in your XY zero location, go to Tools->ShopBot Setup [TS], this will step you through some tool setup questions. You want to get to step 3 (which is the XY prox switch setup), this page has a “Click Here to Make it Easy on me” button that you want to press, a new window will open up, click to start the XY zero setup routine.
This will prompt you to move to the 0,0 location with the keypad, just hit ‘No’ at this step as we have already moved to the correct location, then hit ‘Yes’ to zero at this location.
This will run the homing routine and setup your 0,0 location from there on so the next time you run the C3 (XY home) it will end up where you set it up.
Click next through the rest of the steps and then select I’m Done to save your changes.