A few days ago one of FSwizard:PRo users questioned me over how FSwizard works.

The way SFM calculates seemed off to him.

As a result i made a quick sketch for him, that i thought i would share here.

Omar was asking me how come SFM seemed wrong for a 1" dia ball-nose cutter when making shallow depth cuts.

The sketch above shows exactly why.

On the left part we see a cutter engaged into the material to the depth equal to its corner radius.
At that depth the maximum effective diameter is achieved. So an old good RPM=4xSFM/Dia formula would apply.

But at shallower depths, effective diameter of the cutter is reduced.

At 0.1" depth of cut, effective diameter would only be around 0.6"

In fact it goes to zero at the very centre. So a higher RPM will be required to achieve the recommended cutting speed.

In the same thread i also explained how DOC/WOC balancing works.

So if you are interested - read on.

Here is the thread http://zero-divide.net/index.php?page=forums&shell_id=170&article_id=4590

One of the latest additions to HSMAdvisor speed and feed calculator is the ability to set manufacturer-recommended speeds and feeds for work-piece materials and groups of materials.

Here is a YouTube video walk-through showing how to add S&F tables into the program https://www.youtube.com/watch?v=AJOgWfgy99U

HSMAdvisor uses Brand Name and Series Name to assign speed and chipload tables to tools.

A new "Speed and Feed Source" (S&F Source) indicator has been added to quickly tell user which speed and feed table is being used right now.

Read More 

This is a bug-fix update.

As it turned out usage of "Sticky RPM" caused the calculator to not work properly.

Also when in metric mode, Tool Manufacturer Cutting Speed was sometimes not updating properly.

All the problems have been fixed in this update.

I think it is time to reflect on latest changes to our HSMAdvisor and look at survey results.

Thanks to your input I was able to make changes that I believe addressed some of the issues you guys were having.

You can download and try HSMAdvisor for 30 more days here http://hsmadvisor.com/index.php?page=Download

This update resets your trial counter back to "30 days left", so if your old trial expired, you can use it for one month more.

First of all, I put all of the available overrides on plain sight. Now you do not need to expand a panel to access speed/feed overrides.

I also added cutting speed and chipload to the collapsed view.

Machine Panel now has  Max RPM on collapsed view.

Gages panel now is not expandable and has Read More 

Manufacturing seems to be going back to North America, but thousands of college graduates who finish various CNC -related courses have a very shallow understanding of metal-cutting processes and forces involved.

Frankly i believe Speeds and Feeds should be a separate subject all together.

To help students fill the gap, I am offering US and Canadian educational facilities help with setting up their classes with free HSMAdvisor seats.

Update: Countries of EU and England are now included into the offer!

The total maximum number of seats handed out will be limited to 200.

If you represent a college or a university and want to sign up, please send me an email with your name, position, and number of seats requested.

My email address is cnc@zero-divide.net

I will set up your license and reply with information on how to obtain the license keys.

If you know a place that could benefit from this offer, please share this message.

Eldar Gerfanov, developer of HSMAdvisor and FSWizard machinists calculators.

At my day job I am starting to do more and more manual programming.

Which i do not realy like, but since am at it anyway i have decided to keep piling little articles about G-Code programming into this new category.
This way when i forget things again i will be able to quicly refresh my memory.

Program Start

O0001 (COMMENT OR PROGRAM NAME)

Starting safety blocks

(G20 IMPERIAL UNITS, G21-METRIC)
(G17 XY ARC PLANE, G18-XZ, G19-YZ)
(G40 CANCEL TOOL RADIUS COMPENSATION)
(G49 CANCEL TOOL LENGTH OFFSET)
(G80 CANCEL CANNED CyCLE)
(G90 ABSOLUTE POSITIONING MODE)

G20 G17 G40 G49 G80 G90

Tool Change Routine

(T14 - call 2.5" Face mill)
(M6 - Perform tool change)
(G0 - rapid feedrate)
(G55-G59 - Choose Work Offset)
(X, Y - Command a Position to move to)
(S - choose spindle speed)
(M03 - Turn spindle on Clockwise, M04 - Counter-clock wise)

T14 M6
G0 G54 G90 X{X} Y{Y} S{SPEED} M03;

Apply Tool length offset at retract height, Turn on Coolant

(G43 H14 Z2.0 - All codes must be in the same line Apply cutter length offset from record #14 to cuttent tool, move to 2.0 above work at the same time )
(M8 - Turn on Coolant)

G0 G43 H14 Z2.0 M8

Rapid tool to plunge height

G0 Z{Z_PLUNGE}

Plunge to cutting depth at plunge feedrate

G01 Z{Z_DEPTH} F{F_PLUNGE}

Make a straight cut in xy direction at cutting feedrate

G1 X{X_POS} Y{Y_POS} F{F_FEED}

Retract to plunge height at either rapid or retract feedrate

G1 Z{Z_PLUNGE}

Retract to rapid height, turn off colant

(M09 - Turn OFF coolant)

G0 Z{Z_RETRACT} M09

Retract to tool change height, turn off spindle

(G28 G91 Z0 - all coes must be in the same line, move Z axis to HOME POSITION through a reference point)
(G91 Z0 - Causes reference point to be the current location, thus sending axis straight up )
(M05 - Turn off spindle)

G0 G28 G91 Z0 M05

Perform Next tool change or end program

M30(end program)

We all love getting positive feedback on anything we do.

For example hearing "good job" from our bosses. Or "nice work" from our co-workers....
Okay, Okay bosses do not normally tell anyone "good job", but anyway that would be nice!

I also like reading e-mails which people all over the world send thanking me for my work on FSWizard and HSMAdvisor calculators.
Telling their success stories and suggesting new features.

Most seem very surprised when they send a question on weekend and receive an answer withing a couple of hours.

Often people send pictures of their work and links to their own web sites.

It is nice that more and more professional machinists are using my software, but seeing it help create a work of art is a special feeling.

One of recent customers Daniel Gentile, uses HSMAdvisor to calculate cutting parameters for his custom knife production business.

Here is what he has to say:

HSMAdvisor enables me to efficiently do the math that saves me not just a lot of time as I can confidently often use higher speeds but also a lot of money, as I tend to break less of those expensive 2 and 3mm carbide tools that see a lot of use on my folder production. Also because I work with a dozen different materials - from D2 steel to Titanium to Bronze - and a lot of different cutter types and finish requirements it's just nice not to have to work with "guess-work" for the feeds and speeds.

Daniel Gentile, owner of FERRUM D Gentile, custom Knives & forging classes.

Here is a link to his web site.
https://www.dgentile.com/

Here is a link to his portfolio page filled by pattern welded forged blades and katanas!
https://www.dgentile.com/portfolio.html

If you are a fan of old school forging, custom knives and basically anything to do with knives and blacksmithing, you have got to check it out!

Another week another update!

A few days ago a topic popped up in CNCZone's BobCad-CAM forums regarding why speeds and feeds in above mentioned BobCAM were so crazy and unworkable.

Users were complaining and raving about such a "simple" thing like a good speed/feed calculator being missing from there.

This is actually a trend in pretty much any other CAM software package.

They sell tool to create toolpaths.
Many give tools to create 2D geometry and even real solids.

But very few CAM packages offer anything that even remotely resembles working starting cutting parameters.

It does seem bizarre and strange. But every CAM program "knows" type of material being worked on. It knows type of tool, its diameter and length.
It even knows flute length, cutting depth, width, ramp angle... pretty much everything.

But given all that they are unable to combine all this data and produce Speed and Feed that would not either break the cutter or melt it into the work-piece!

Anyway. Back to the topic.

Someone on that forum thread mentioned my old FSWizard.
It sparked quite a lot of interest, and i popped in and dropped a link to the latest version of HSMAdvisor, so that they actually try and see what a good calc can do.

As a result i have received a ton of emails filled with suggestions and thank-yous.

Apparently many did not even know anything about it and were surprised how well it worked for them.
One guy who just bought a license even said that his copy already paid for itself several times over within the first couple of days of using it!

To thank for enthusiasm, i quickly implemented some of those suggestions and i am now releasing them in this version 0.710

New thing are

• Adjustable font size and style. (in Settings) Allows to adjust global application font.
• Adjustable default values for Speed&Feed Overrides, Tool Productivity, Deflection and Torque Limits. (in Settings) You can now set values to which overrides reset by default.
• New Plunge Feedrate field shows up for milling tools.
  Non-Center cutting tools like Indexed endmills etc. will have plunge feed equal Zero.

Thanks everybody for support and suggestions!

As usual you can download the latest release on the Download page.

After almost 2 months since the last release the next update has just been uploaded to the google Play Store.

Version 1.32 follows in the footsteps of the HSMAdvisor.

It now too has latest material definitions and an updated custom material drop-down list.

This list now expands to the size of the screen overriding default Samsung's scroller (that they stole from iPhone).

Biggest update yet is a new Tap and Form Tap tool types.
You can now get not only cutting speed and feedrate for taps, but also calculate the best drill size for desired thread percentage.

New material list Tap Tap hole parameters

Hello guys,

I have just uploaded a newest update to HSMAdvisor v0.702.

One of the users reported several problems over this weekend and i have just fixed them.

I strongly encourage anyone who has downloaded previous version to download and install this update.

It adds UN thread type and fixes "strange" cutting speeds for stainless steels and fixes graphcal bugs caused by "Larger font size" settings on your desktop.

Also i have reset all trial counters, so that anyone who still does not have a license has another 30 days to try my software!