There have been a number of enhancements on the Hurco WinMax control in the past few months and years that we never really get to share with our customers. The Hurco control is so easy to use and easy to self-teach that often times there are overlooked features that could be extremely useful and very powerful if operators knew about them. I thought this would be a great topic for a blog article to help our users find and understand these features if they weren’t previously aware of them.
Using Work Offsets in Conversational Programs (G54-G59, 93 Auxiliary Offsets):
There are often times when there is a need to switch between different setups on the machine – like when you have multiple operations setup in different vises on the table. Previously the operator had to input a Change Part Setup into the program each time they wanted to switch to a different setup coordinate, and another one to switch back. This is problematic because, if a small shift is necessary, in the X-axis for example, then the operator would need to locate EVERY SINGLE Change Part Setup in the program that referenced that particular location and make the change…which could easily be dozens of places throughout the program. However, by using the Work Offsets feature the change can be made in one single location (G55 for example) and everywhere that particular work offset is called the change would be utilized.
The Work Offset block is located in the conversational programming section under the Miscellaneous tab (Miscellaneous, More>, Work Offset).
Stock Allowance Tab:
Historically on the Hurco control the amount of stock left for finishing allowance was a global setting that was located in the Program Parameters for any given conversational program. The challenge with this “global” setting becomes apparent when you need to change the amount of stock left for a particular block, or if you want to leave grind-stock on a feature before heat treating – which would mean that you needed to lie to the diameter of the tool or the size of the feature. However, by turning on the Stock Allowance tab in program parameters both of these challenges can easily be addressed.
With the Stock Allowance tab active, you can set the amount of material that will be left for the finish pass in each conversational block of the program independently; and, to alleviate the need to lie to the control when leaving grind-stock, the allowance stock will NOT be removed if you don’t program a finish tool. This can also be helpful when stress-relieving a part during machining. Simply leave the stock now, copy and paste the block into a different location later on in the program, and then remove the allowance values.
To change the setting so the control will allow the use of the Stock Allowance tab, go to Program Parameters, select the Milling 1 tab along the top of the page, and set the Stock Allowance Mode to DATA BLOCK. Remember to save this setting as a USER DEFAULT if you want this to become the new defualt setting for future conversational programs.
Setting a Reference Return Position for NC Programs (G28):
In many NC programs the use of the G91 G28 XYZ reference return position is very common. As a default setting this code will send the machine to the home position for each axis. However, Hurco has provided a setting in the NC Parameters that will allow the user to designate where the machine should travel when the G28 command is executed.
With an NC program active, select PROGRAM PARAMETERS from the INPUT screen, select the NC PARAMETERS softkey, select the NC CONFIGURATION PARAMETERS softkey, and set the desired location for X,Y, and Z Reference Return Points.
First Peck Offset:
Every conversational programming block has both a Z START and Z BOTTOM field for designating the rapid point and final depth of any feature in the Z-axis direction. These blocks also have a PECK DEPTH field as well. Sometimes, depending on the values, the tool will cut a lot of air while pecking before it actually contacts material. The Program Parameter setting for FIRST PECK OFFSET can help alleviate this wasted time.
For example, when inputting a Z START of .100” and a peck depth of .025”, the control will begin pecking at a location of .100” above the part…therefore it will take 5 full pecks before the tool actually begins to remove material. By setting the FIRST PECK OFFSET parameter to a value of .100” the control will force the tool to position at the Z START location, offset or shift down the amount of the FIRST PECK OFFSET, and begin to peck from that new location. In our example above material would be removed on the very first peck and therefore eliminated any wasted time. This parameter can be found on the GENERAL 2 tab of the Program Parameters.
Display Axes Designators instead of IV & V with Default Universal Rotary Setting:
When you create a new conversational program, the default setting for the program type is UNIVERSAL ROTARY…which is definitely the setting we would like you to use for many reasons. However, when the program type is set to Universal Rotary the part setup screen will display X, Y, Z, IV, and V as the axes for the machine…regardless of machine type. On 5-axis machines this can be confusing because it doesn’t display the actual axes of the machine, and on 3-axis machines it is confusing because there isn’t a 4th or 5th axis available.
To change this behavior we need to change one of the user preference settings. Press the AUXILIARY button on the control panel, select the UTILITY SCREEN icon from the pop-up menu, select the USER PREFERENCES softkey on the screen, select CONVERSATIONAL SETTINGS, and set DISPLAY MACHINE AXES FOR UNIVERSAL TYPE to a value of YES.
For 4 and 5-axis machines this will cause the control to display the actual A, B, or C designator for the axes, and for 3-axis machines it will eliminate the display of the additional axes altogether. This will NOT change the way existing programs behave and no changes in programming will need to be followed for future programs. This will just simplify the display.
Using X/Y SKEW (DEG) field on the Part Setup Screen:
By entering a value into the provided field on the Part Setup screen, an entire program can be skewed for any desired purpose. For example: if the program is machined in an un-rotated orientation as normal, but the part must be placed on the machine at a 45 degree angle to allow it to fit into our setup, then a value of 45 degrees can be entered into the provided field and the entire program will be executed at the rotated orientation.
Although the intended purpose of this field was for probing a part for skew, it has proven to be very useful for manual input of values for reasons like the one in our example above.
Jog Along Current (active) Work Coordinate System:
Similar to using the SKEW angle mentioned above for programming, there are also times when you might need to manually jog the machine along the skewed (active) work coordinate as well. To do this you will simply need to select a mode button in the manual function setup screens.
Press the MANUAL mode button on the control panel, select the MANUAL FUNCTION SETUP softkey on the screen, and select the TOGGLE JOG IN PART COORD SYS softkey. Now, with this toggle active, whenever the X or Y-axis is jogged manually, using the jog wheel or jog buttons, both the X&Y axes will jog accordingly…moving the tool along the corresponding edge of the part. To shut this feature off, simply toggle the softkey again. This feature is also available during an interupt cycle on a 5-axis machine when a transform plane is active.