Category Archives: Haas Turn

Haas Screenshot How to Make One

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Category : Haas Mill Haas Turn

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You might not know it but if you put your memory stick into your Haas control then press and hold SHIFT as you press F1 you get a Haas screenshot or a (Haas screen capture) on your memory stick.

Haas Screenshot

It is really useful if you need help because you can save a record of what is on the screen.

With this Haas Screen Capture. You could use it for set up sheets. It will also be useful if you want to create training literature.

If you want to enter a name for your screen capture just input it before doing the above.

I love the fact that Haas are constantly improving their products the machines are so well thought out. They were the first ones to incorporate a coolant hose to clean down the machine.

Extras

I notice now some things do come as extras but they still come well loaded. It’s not like when you buy a car and you find that all the things that really attracted you to it (don’t we just love the toys) are extras.

Haas Screenshot
Range rover with no wheels

Just having a memory stick on a machine is really good. I cant help but think that it seems to be taking so long for machine tool companies to really get to grips with technology.

Sometimes when I am training people who never worked a CNC before I feel embarrassed to say “oh the memory is like the size of a 1980’s calculator”

Haas Screenshot
1970’s Calculator

The editing on some controls (and I won’t name names, as I can’t retire yet) is poor to say the least. Students used to using a PC expect to be able to easily COPY and PASTE bits of programme.

Good luck with that one.

Fanuc Screen Capture

Yes you can do it.

Where’s The UNDO Button?

UNDO (don’t even go there) some do have it. But wouldn’t it be great if you could UNDO things like offset changes. These things are gradually coming in on new controls but I can’t believe how slow it’s all been.

And you thought this articcle was just about taking a Haas Screenshot

Anyway I’m rambling again (only doing it to get the word count up), I will be using this Haas Screen Capture all the time. Typical Haas practical, user friendly. Keep up the good work boys.

Fanuc Screen Shot

Yes Fanuc Does it Too

Go to a screen you would like to capture.

Press and hold the [SHIFT] button for 5 seconds.

The control appears to lock up for about 15 seconds.

Once it frees up an image will be on your memory stick or memory card.

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Using G10 On A Fanuc CNC Lathe

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Category : Fanuc Turn Haas Turn

This article is about using G10 on a CNC Lathe to set the work shift or work zero offset as it is known on a Haas control.

If you have ever used Mazak machines you will know that when you call a program the work offset is kept with it.

Obvious really……

I mean if you were teaching your dog or your cat to program a CNC Lathe and you told him that he had to reset the workshift every time he called a new program what would he say.

I mean nothing really but he’d probably give you a strange look.

But you can do it on a Fanuc control or on a Haas control.

You just put this………………….

G10 P0 X0 Z-98.1

Using G10

So you would put that at the head of your program and it would change the work shift screen as above.

Advantages

No need to set workshift everytime.

Automatically sets X figures so there’s no chance you could alter it by accident.

 

Well there is a slight catch.

It’s obvious really but from now on you can only change the workshift from the program.

If you altered it on the workshift screen it would just change back when you run the program.

Now I know your not stupid enough to do that but I bet the bloke on nights is.

The Big One

When you restart a program you must remember to read this line.

Imagine if you tried to re-run the threading tool after altering the G10 you would just jump to that tool and run it. (Your new offset wouldn’t work)

Therefore you must remember to make the control read it in before running any tools.

Now the clever bastards will have a solution to this.

(This songs hilarious by the way)

What you could do is use a subprogram, if you had one for tool change position you could dump the G10 there.

That way each tool would read it.

Oh yea and it’s probably a bit more tricky to alter as you can’t use input plusUsing G10

So you have to revert to mental arithmetic.

Ok So Why Do I Need All This Crap

Do you use the same chuck day in day out?

Do you keep the jaws for each job?

Well if the answer to these questions is yes, your workshift value is the same every time you set up this part.

Do you really want to reinvent the wheel?

 

Thanks for watching and reading

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Using U To Program Taper CNC Lathe

Category : Fanuc Turn Haas Turn

I recently wrote an article on the use of incremental U and W on a CNC Lathe for incremental programming.

I must be honest I didn’t have that many creative uses for it.

Anyway when I posted it on Linkedin I did get some interesting replies and comments. I was surprised to see how many people do use incremental U and W.

incremental U

 

About a year ago I was working at Gardner Aerospace and we were struggling to get rid of a taper on a shaft we were machining.

Not a particularly difficult job other than this pesky taper we kept getting.

It was something like 30mm diameter by about 140mm long. We were making it on a new Haas ST lathe we struggled to hold the size which was about plus or minus .02mm and were getting a taper too.

I noticed that when we programmed a taper it was easy to make a mistake.

incremental U

The above program would take the size .015 less.

incremental U

When it came to changing the taper again the calculation had to be made. I suddenly had a brainwave and realised we could program it in incremental by using a U figure.

incremental U

The great thing about doing this is that you can see exactly what taper you have and it’s really easy to modify. 

The other thing is that the figure is always going to be small so it’s easy to spot mistakes.

I got so excited I even made a video.

Thanks for watching and reading

If you have been affected by any of the issues in this post or need CNC Counselling then contact me.

Or call us

If you want to learn to program CNC Milling Machines

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G94 Facing Example (Sample Program)

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Category : Fanuc Turn Haas Turn Mazak Turn

G94 Facing Example

G94 Facing Program Example

G94 Facing Example

:Blank Size: 65mm Diameter 85mm Long

:Final Size: 65mm Diameter 82mm Long

This program will rapid to X66. Z3. it will then machine the face down to Z0 in three cuts. The first G94 line tells it to face past centreline to X-1.6 at a feed-rate of F.2 The Z axis moves to Z2.

Cuts
1: Z2.
2: Z1.
3: Z0

The cycle stays in the control until cancelled by a G0 rapid command.

So it remembers exactly what you told it, a bit like my wife, she keeps reminding me of the time I got so hammered I pissed in her wardrobe (some of the shoes still smell to this day).

The G0 G28 U0 W0 will move the turret back to machine reference point.

The G0 will cancel the G94 Facing cycle.

G94 Facing Example Is It Any Good?

Well personally I think it is.

Now I’ll tell you why. You could say it’s really easy to write the program to face a part.

G0 X50. Z0
G1 X-1.6 F.2
G0 X50. Z2.

So that’s easy to do but….

Some one wrote a comment on one of my posts the other day and he started it by saying “back in the real world”.

Can’t lie and say it didn’t piss me off but being the mature well balanced man that I am I ignored it.

Now my inner nasty, immature, unbalanced me said “look mate I was in the real world when you were still shitting yellow”. Obviously I didn’t post it and if your reading this now thinking it’s you, well it isn’t.

Anyway as to the G94 Facing Example

In the “real world” you get to the end of the batch of parts and find that one of them is way too long and you need to face a shit load off the front.

Now had you used the cycle as below and got into the habit of always using it.

G0 X50. Z3.
G94 X-1.6 Z0 F.2
G0 G28 U0 W0

The alteration would be really easy.

G0 X50. Z12. (Imagine You Have An Extra 12mm On the Face)
G94 X-1.6 Z10.5 F.2
Z9.
Z7.5
Z6.
Z4.5
Z3.
Z1.5
Z0
G0 G28 U0 W0

Rapid Move Cancels G94

Note don’t forget you must have the G0 rapid move at the end to cancel the G94.

(Just like G0 cancels a canned cycle in milling)

Don’t be tempted to put G0 in the moves as the control will just wiz around in Z and sit there laughing at you.

G0 X50. Z12. (This is what not to do)
G94 X-1.6 F.2
G0 Z10.5 (NO NO NO NO NO NO)
Z9.
Z7.5
Z6.
Z4.5
Z3.
Z1.5
Z0
G0 G28 U0 W0

See full explanation

Using G94 on a Haas Lathe

Thanks

If you have been affected by any of the issues in this post or need CNC Counselling then contact me.

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How G28 Works. Why two pushes of CYCLE START?

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Category : Fanuc Mill Fanuc Turn Haas Mill Haas Turn

How G28 Works

Every wondered why G28 takes two presses of the CYCLE START Button when you are in single block.

How G28 Works

Be amazed you are about to find out.

One of my pet hates, and at my age you have thousands, is when people say

“Oh I don’t know we’ve always done it”

I just think, well you are stood at this machine for eight hours a day why not find out what’s going on.

How G28 Works

How G28 Works

G28 tells the machine to return to its home position. This is usually a convenient point for a tool change.

The command on a machining centre looks a bit strange.

G28 G91 X0 Y0 Z0

Why G91?

Well G28 means return to your home position via an intermediate point.

So if you programmed G28 X0 Y0 Z0 then your machine would rapid down to the workpiece (probably crash) and then go to it’s home position.

What G28 G91 X0 Y0 Z0 tells the machine is this……

  • The reference point is incrementally zero from where you are.
  • So the machine does not move.
  • Then it goes to it’s home position.
  • Hence the two presses of cycle start.

On a CNC Lathe we use U and W for incremental. Read this post if you don’t know.

So if you programmed G28 U0 W0 your X and Z axis would return to their home position. This being because the reference point is incremental.

If you programmed G28 X0 Z0 you would probably get a collision like below.

Well at least it went home.

First move is to X0 Z0 which is the front of the part. (This is your reference point.)

The machine would then move back to zero return.

G28 is fine on a CNC Lathe but on a CNC Machining Centre you must remember to change back to G90 (Absolute).

My preference is to use G53 to get back to your home position.

Read this article if you never heard of G53.

Please note some older machines don’t have G53. Oh and it is classed as an option!

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