Enable Blunt Start : This will enable Blunt Start threads to be calculated when pressing the Do It button. All machining will be done with the same tool as the main thread ( as defined in Tooling tab ).
It can be a good practice to set up the main thread first and generate the operations for roughing and finishing,
then turn off Do Roughing and Do Finishing and apply the operations for blunting seperately.
Remember to turn on Process Ops to generate GibbsCAM operations for blunt start. Turn Process Ops off while setting everything up.
For Blunt starts in multiple positions on the thread, GibbsCAM operations for one position must be generated at a time.
Set the amount of revolutions of thread to remove. This is calculated from Thread Start Z in Machining tab (Tab 4)
Depending of how far the Thread Start Z are set from the material, set any number here until it reaches over the incomplete thread.
Use number with decimal to adjust in between revolutions e.g. 1.5 or 2.2
Set an run-out angle for the tool to exit the material. 0 is straight up and will produce the shortest blunt.
Larger angle will make the tool to use longer time to move out of the material so the distance of the blunted thread will be longer.
Run-Out Angle are not necessary for when exiting into a thread relief or air, as when making a blunted thread at the end of the thread.
Run-Out Angle : 5° Run-Out Angle : 15°
Simulation with Blunt/Quickstart at the start of the thread, 5° and 15° Run-Out Angle
Set an run-in angle for the tool when entering material. 0 is straight down and should only be used if starting in air.
Larger angle will make the tool to use longer time to reach the cut depth so the distance of the blunted thread will be longer.
Run-In Angle are not necessary for entry into air, as when making a blunted thread at the start of the thread.
Run-In Angle : 5° Run-In Angle : 15°
Simulation with Blunt/Quickstart at the end of the thread, 5° and 15° Run-In Angle
Right Offset and Left Offset can be used to offset the blunt position in the Z axis. Use positive and negative numbers for both directions.
Right Offset : This will offset the blunting positions on the right side of the thread profile. Left Offset : This will offset the blunting positions on the left side of the thread profile.
The default Right and Left offsets of 0 are the calculated minimum width and position the current tool need to remove the thread down to the root.
Various machine tool states with different parameters, ballscrew backlash, acceleration settings, etc can make different machines leave different results when blunting threads.
When running these blunt passes for the first time, always try to run with conservative depth of cuts and observe the machining process.
If the tool leaves a sliver of thread after the process, you can adjust and center the blunt toolpath with Right and Left offsets.
Widen the cutting area with adjusting Right and Left offsets in opposite directions (± Z axis).
Move the cutting area with adjusting Right and Left offsets in the same directions (± Z axis).
When setting up this can be useful to turn on Draw Toolpath Lines under Control tab to visualize the toolpaths before creating GibbsCAM operations (See image below).
With moving the blunt positions towards the end of the thread, you can machine away the sharp portion at the end of the thread.
Move the blunt position by counting the number of threads / revolutions and multiply this with the pitch of the thread.
Lets say for 15 threads / revolutions on a 4 TPI thread, set both Right Offset and Left Offset to -15*6.35 (-95.25mm) or if you work in inches, -15*0.25 (-3.75in)
You can enter mathematical operations directly in all the input boxes, e.g. type -15*6.35 and hit Tab key on keyboard.
Move positions anywhere on the thread, offset the position with multiplying revolutions with the pitch of the thread, and amount of revolutions to remove.
Removing portions of a thread in multiple positions
Always remember to use Run-in angle when moving blunting into the thread. Without Run-in all the blunt cuts will rapid unsynchronized into the thread.
Exit Cut : Set feed exit or rapid exit for when exiting out of the thread. Setting this to rapid will use G0 for exiting out of the thread.
Feed Exit will move the tool out of material with the same feed as when threading and follow the set Run-Out angle. Run-Out angle will determine the length of the blunted thread.
Rapid exit will move the tool out of material with rapid feedrate and will produce a short and steep blunted thread.
With Full Profile Exit option enabled, it will extend the end position past Thread End Z to follow the thread profile out of material.
This can be used if the thread have no relief groove, and will produce a smoother end transition to the thread.
Holds information of the calculated Rough Cuts in the current programmed thread. 'amount of cuts' [ hh:mm:ss ]
Rough Cuts 60 [ 00h 04m 01s ] means roughing the current programmed thread requires 60 threading passes with an estimated machining time of 4 minutes and 1 seconds.
Holds information of the calculated Finishing Cuts in the current programmed thread. 'amount of cuts' [ hh:mm:ss ]
Fin Cuts 112 [ 00h 07m 29s ] means finish machining the current thread requires 112 threading passes with an estimated machining time of 7 minutes and 29 seconds.
Est. Run Time shows the calculated Run Time for machining, for all Roughing and Finishing passes combined.
To improve the time estimate, you can set your machine tool Rapid Feedrate in the Settings tab. Your machines rapid feedrate can be found in the parameters of the machine.
As there are as many rapid moves as feed moves in machining a thread, setting the correct rapid feedrate will allow for a more precise time estimate.
If you work in metric, set the Rapid Feed in millimeters/minute. If you work in inch, set the Rapid Feed in inches/minute.
Default values in ThreadTracer are 12000 millimeters/minute for GibbsCAM in metric and 500 inches/minute for GibbsCAM set to inches.
Everything in ThreadTracer is controlled by the 'Do It' button.
You can turn on/off options, generate visual geometry, change cut depths, change tool sizes and everything will be recalculated and updated when you press 'Do It'.
As long as the 'Process Ops' or 'NC Postprocessor' are disabled, no GibbsCAM operations or g-code will be generated.
Set up the all the roughing and finishing of the thread and only enable 'Process Ops' when everything seems correct. With 'Process Ops' enabled it will generate GibbsCAM threading operations.
'Do Roughing' and 'Do Finishing' can be set individually. If only 'Do Finishing' is enabled and 'Process Ops', it will only create GibbsCAM threading operations for the finishing passes.
Click 'Do It' button to start running the options that's selected.
As ThreadTracer is an external plugin, there is no 'ReDo' button. If you need to change anything you must delete the threading operations in GibbsCAM and create new ones in ThreadTracer.
If you delete the threading tool instead, all the operations in GibbsCAM that used that tool will be removed, this is often faster than selecting multiple operations with scrolling for deletion.
ThreadTracer will always create a new tool based on tools settings from the Tooling tab (Tab 3) if no previous tool exists.
If you are using NC Tracer to generate g-code for machining, Process Ops should be disabled(off) and instead enable 'NC PostProcessor' in Tab 7.
Click 'Save Data' to store the current thread setup into the GibbsCAM program
It will create a new data entry if its a new thread, after the thread setup is stored the button will change to 'Update Data'.
This way you can store and update the same thread entry, and not create a completely new thread entry every time the 'Save Data' is clicked.
If you need to create a new data entry in the GibbsCAM part, you must close ThreadTracer and restart it, and it will now start with a new data entry.
These lines of text can also be copied and pasted into other GibbsCAM programs, to quickly recreate the thread without typing in all the parameters again.
Visual Delay Timer for in between each calculated thread pass.
The Delay Timer can be useful for delaying the visual geometry drawn in GibbsCAM. If something seems off, it can sometimes help track the error with a delay and confirm that every pass is done correctly.
Delay Timer was initially used in development of ThreadTracer, but kept it as it can be useful to slow things down if there is a suspicion of some passes not being laid out correctly.
Online Guide button will open this ThreadTracer documentation in a new web browser window.
ThreadTracer will parse information on what thread style and tab thats currently open, and redirects the web browser to the relevant page.
Clicking the 'Online Guide' while in Stub Acme and Tab 5, will open the documentation for Stub Acme and Tab 5.