Often times CNC programming tutorials only teach you how to create the tool-paths and not enough attention is paid on showing how to properly hold parts being machined.

At the same time efficient workholding is an art in it self and mastering it could drastically improve shop productivity and accuracy.

Without further ado let's jump into the workflow.

Step 1. Analyze the Drawing and the Model

We would have to look at the drawing, tolerances and the CAD model to develop the machining strategy.

This particular part has tight (+/- 0.001) tolerances between the features located on the top and the bottom sides. In addition to that it has a 2.5 degree draft angle on external walls.

Thus I decided to not use the soft jaws approach and machine it in a fixture. Soft jaws are generally OK for tolerances down to +/-0.001" but because of the draft angle the part would always want to pop out of the jaws.

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1. Finished Part 2. First Op: Before 2. First Op. After 3. Machined Fixture 4. Second Op: Bearing Seat 5. Third Op: Finished Part

Before we start milling away our stock we first need to get down to the required depth.

This is not a problem with external features when we can plunge outside.

When machining closed pockets, however, we need to find a way to get down to the machining depth first.

As usual there are several ways to get the job done. The plunging methods listed here are not ordered by their preference.

For various machining operations on different materials some may be more preferable than others.

Straight Plunging into a larger Pre-Drilled hole

This is one the best ones in my opinion.
Very few machining modes can compete in effectiveness with drilling and this method will get you the best combined tool life on most materials and (in case of many deep pockets) the least machining time, even when tool change time is factored in.

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I have just uploaded the latest update to HSMAdvisor hook for MasterCam x9 and 2017.
This is a catch-up update to the latest HSMAdvisor improvements.

Additionally i promised few guys a tutorial on how to easily install the hook into MasterCam 2017

So here it is:

Please excuse my lack of artistic prowess.
Hey, You can be ANYTHING but you can not be EVERYTHING

And i am more of a technical guy who, perhaps, lacks the hypnotizing narrating skills of a salesman :)

Tool Inventory Control has been added to HSMAdvisor as a free feature for our customers.

Here is a quick video explaining how to use this new feature.

Should you have any questions or recommendations please let me know via email or support forums.

Tool Inventory Advisor is now included into all HSMAdvisor License types!

This feature is absolutely free for HSMAdvisor customers. No special login is required. It is already built in!

Please download the latest update to enjoy the latest update!
Some video tutorials will be published this weekend.

Also in the this update:

• Changed the look of Material and Tool drop-downs
• Added search to Tool list drop-down
• Uploaded new machines to the HSMAdvisor Cloud
• Improved function of Tool Library
  Fixed small bugs
  "Shared Database" flag is now set in the database file itself

Did you know there are three ways you can touch off your tools?

Because of how Machine Offsets add up, there are several ways CNC machinists can set their Tool and Work Offsets.

This is especially true for Tool Length Offsets.

Tool Offsets can be either Positive or Negative.
Depending on your Machine Shop equipment you should use one or the other.

Regardless of how you set your tool length offset, you apply it the same way.
Right after the tool change and after turning on your spindle and moving to your X Y position above the part.
The very first absolute Z movement should be the line where you apply the tool length offset.

Positive Tool Offsets (gage line tool length offsets)

In the case of Positive Tool Offsets, the offset represents the Length of the tool measured as a distance from the Gauge Line of the spindle (typically spindle nose) to the tip of the tool. The longer the tool, the larger your Tool Length offset will be.

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Before we run any G-Code program, we need to tell the machine where our part zero is.
A Part Zero is simply a bunch of numbers that offset the axis to give the machine a new coordinate point to work from.

Work Offsets is one of the most basic pieces of knowledge any machinist must-have.

Let us account for all the basic coordinate systems and definitions, available in a generic CNC machine

• Machine Home and (Absolute) Machine Coordinates
• Work Offset Coordinates
• Tool Length Offsets

Machine Home and Machine Coordinates: G53

Machine Coordinates (or Absolute Coordinates) is the absolute and constant representation of the machine axis position.
These coordinates never change between Machine Restarts and must remain such. In fact, there is often no way for an operator to adjust the Absolute Machine Axis Home position.

Machine Home is simply that magical place where all Machine Coordinates should become Zero.

To Home the Machine is to start a machine operation, that will move all Axis to their soft limit position where X, Y, and Z-axis reading will be set to zero.

Homing must be done every time you restart your machine. Without it machine does not know where is the position of its table or spindle.

When homed your machine coordinates will read X=0 Y=0 and Z=0 and it is going to look like this:

The point where Machine X and Y intersect is called Table Home Position and the one where the Machine Z-axis starts from is called Spindle Home.

Now, there is no agreement between machine tool manufacturers on where the machine home should be.

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Canned cycles are used every time we need to drill, ream or tap holes on our CNC machine

Standard Fanuc G-Code language supports more than a dozen canned cycles.

The most common cycles that will cover 99.9% of your g-Code CNC programming work are:

Subsequent holes

You can drill additional holes After your canned cycle has been initiated.
Any line with X Y position will be treated as another hole position.

Each position can have its own Retract value, feed rate and retract height modifier.

G80 - Canned Cycle Cancel Code

After all the holes of the canned cycle have been drilled, it is required to call G80 code in order to cancel the current cycle.

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I have just uploaded my first FSWizard CNC MAchinists Speed and Feed Calculator video tutorial.

This is a quick walk through the basic functionality when using milling tools.

Please excuse my tired voice and occasional stuttering. This was my 9th take- every time either my computer crashed or i was interrupted by my kids running around and causing mess.

I am planning to release more videos. So please let me know what other topics i need to cover.

We have 2 new calculators available on Reference tab.
It is Oblique Triangle Calculator and a Fillet calculator.

I also fixed Floating Window's missing fields.

I have finally bought a proper microphone and was able to record a tutorial video, where i show a way to calculate speeds and feeds for pocketing in D2 tool steel and also calculate ramping feed rate.

during my meetings with shop programmers i have found out that some people did not really understand the functionality behind Helical Ramping calculator. A more detailed video on Circular Compensation and Ramping to follow.

This video is already on my YouTybe channel: