Hello Guest it is August 14, 2020, 01:59:36 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Shaggy

Pages: 1
1
General Mach Discussion / Re: Different speed in material and above
« on: September 14, 2016, 10:41:42 AM »
I can get you some figures if you let me know your spindle power and what type of tool - 1flute or two flute etc.

Or you can look in to a program called HSMAdvisor its great for speeds and feeds but you will need to know how to set it for a small machine as it assumes industry size stuff :)

Once set correctly, the motor tuning never really gets looked at again, unless you alter the machine etc.

Is there a tool library feature in ArtCam - this is where i would set my feeds for each tool/material combination then its just a simple matter to choose the tool when doing the CAM and you always get the right speed settings etc. :)


I use 2m single flute carbide a lot in aluminium and on my machine i use 24,000rpm, 370mm/min feed, 1mm depth max, 0.59mm width max and it will run this all day.
You can tune differently though as it will also run a 5mm cut depth but only at a max of 0.1mm engagement - great for finish passes.



I use 1 Flute 2 mm end mill from sorotec - http://www.sorotec.de/shop/Cutting-Tools/END-MILLS/END-Mill-ALU-412/End-Mill-Z1--2-0mm-SL-5-ALU.html

There is tool library in ArtCAM and setting parameters for each tool is my next step.

My engraving does not go deeper than 0,5 mm so till now i did 2 step down's of 0,25 mm each.
When you say 1 mm max depth do you make that depth in single pass or you make it in a couple of passes (step downs)  ?

@RICH

Thank you for link !

2
General Mach Discussion / Re: Different speed in material and above
« on: September 14, 2016, 07:44:07 AM »
Thank you guys for help!

I get it all.

Where was the problem?! Well since I'm pretty new to CNC processing I didn't saw that there is in ArtCAM under ''Profiling tool'' menu a tab where you can set Feed rate , Plunge rate, RPM and so on.

I was doing a mistake by leaving all the time default value for 2 mm End mill which was 13 mm/sec. That default value (13 mm/sec) was too fast for aluminium engraving so instead of changing Feed rate in ArtCAM I was limiting my machine speed in Mach 3 under tab ''Motor and tuning''. That resulted with a enormous waste of time in every one of my jobs.

Now I set my Mach 3 machine speed to 1500 mm/min and that allows fast movement over the material, but when mill touch the material than it slows down to a speed I've entered in ArtCAM under ''Profiling tool'' values.

Next thing I need to do is to calculate feed rates and RPM for my 2 mm carbide End mill and input that settings in ArtCAM.

This was pretty simple problem to solve but for every other confused person out there  I tried to explain the best I could where I was mistaken.

Cheers !

3
General Mach Discussion / Re: Different speed in material and above
« on: September 14, 2016, 04:59:05 AM »
Quote
Usualy I make G code with ArtCAM.
Is there any software that can change G00 G01 speeds automatically instead of me doing it manually in Notepad ?

The Gcode G00 / G01 moves are usually automatically taken care of by the post processor used in ArtCam.
Are you using a Mach3 post processor ?

Tweakie.

I don't know what exactly do you mean by ''post processor''.
I use ArtCAM to generate G code and than I use MACH 3 to transfer it to machine. I just upload saved code in MACH 3 and start the job.

4
General Mach Discussion / Re: Different speed in material and above
« on: September 14, 2016, 04:49:48 AM »
Not quite correct but you have the right idea.

Quote
I want my machine to move 500 mm per m when it is in material and i set that in mach 3 - motor and tuning - velocity tab.

You set that in Gcode with the F### command.

Quote
I want my machine to go 1000 mm per m when it is not in material and for that I should go into G-Code with Notepad (for example) and change all G1 F's from 500 to 1000 (for example).

You set that in Motor Tuning with Velocity.

Tweakie.

My mistake. I'll try that right away.
Usualy I make G code with ArtCAM.
Is there any software that can change G00 G01 speeds automatically instead of me doing it manually in Notepad ? 

5
General Mach Discussion / Re: Different speed in material and above
« on: September 14, 2016, 04:39:51 AM »
G0 and G1 are modal commands, meaning that once set it is the active mode until a different modal command is set.  As an example:

G0 X0 Y0 Z0
X1
Y2
G1 Z-0.5 F50
X4 Y5 F600
X3 Y7

In this rather basic program, the machine is set to rapid movements (G0) and positions the tool at zero for all axes, then moves (still at rapid movement) the X Axis to 1 followed by a movement of the Y axis to 2.  (These two moves can be combined into one line and the tool would then traverse at a diagonal line from 0,0 to 1,2 rather than a straight move along the X axis and a seperate move on the Y axis.  Next, a cutting move (G1) is made on the Z axis to -0.5 at a feed rate of 50 followed two cutting moves (still in G1 mode) at a feed rate of 600 to various points on the X and Y axis.  These last two moves are diagonal moves since the X and Y values are on the same line and the feed rate (F600) is set until changed by a different F word so both of the last two moves are made at a feed rate of 600.

In Motor Tuning, adjust the Velocity to the speed at which your machine is capable of running RELIABLY.  This velocity is what is used for G0 moves.  You'll also need to adjust acceleration accordingly to get smooth starts/stops as well as keeping it high enough so that corners don't become rounded.

As shown above, G1 moves are made at a speed determined by a feed rate command.  This can be set with F followed by a number or you can manually set it through the feed rate controls on the Mach 3 screen.  However, if you set it through the screen controls it can be altered by the program if an F command is encountered.  But again, to really summarize:

G0 - Rapid move at the velocity set in Motor Tuning
G1 - Cutting move at the currently set (via program or screen) feed rate.

Hope that makes sense.

Highspeed

It makes perfectly sense. Thank you !
If i get it right the procedure is next.

I want my machine to move 500 mm per m when it is in material and i set that in mach 3 - motor and tuning - velocity tab.

I want my machine to go 1000 mm per m when it is not in material and for that I should go into G-Code with Notepad (for example) and change all G1 F's from 500 to 1000 (for example).

And that will make my machine goes 500 mm per m when it is in material and 1000 mm per m when it is above material. Correct me if I am wrong.


6
General Mach Discussion / Re: Different speed in material and above
« on: September 14, 2016, 03:10:34 AM »
Well guys thanks for fast replay's ! :)

At the moment my Velocity is set to 500 in MACH3.

I don't know what is maximum speed my machine can go, but it certainly can go faster than that (500).

Where do I set G0 and G1 parameters ?

I suppose if G1 is used for cutting moves it can be set in Motor Tuning under Velocity tab.

But where do I set G2 speed ?

Cheers
 

7
General Mach Discussion / Different speed in material and above
« on: September 13, 2016, 06:02:26 PM »
Hi guys,

Im into aluminium engraving.  I must engrave a lots of letters (words) on big aluminium plate and some of letters are very far from each other.
My question is:

Is there any option in Mach3 where I can set up that my CNC machine go faster when it is above material and slower when it is in material ?

For example I want 1200 mm/s when my mill is into material I want to engrave and 2400 mm/s when it is above material (mill is going to another letter).
Whit that I would be able to reduce my time a  lot.

Thank you !

8
General Mach Discussion / Re: Problem with round letters
« on: January 08, 2016, 08:11:06 AM »
There appears to be a lack of rigidity with your machine - perhaps tool flex, perhaps axis flex, perhaps backlash (as Dave has suggested).
Maybe more passes with shallower depth of cut, reducing the tool loading, would help.

Tweakie.

How to reduce tool loading ?
I dont think more passes with shallower deoth of cut would help, cause I tryed it already.

9
General Mach Discussion / Re: Problem with round letters
« on: January 08, 2016, 07:56:02 AM »
Is there any backlash in either of the axes??


Here, I uploaded a video of a working machine, so check it out.

https://youtu.be/zTNxxEgkmW4

10
General Mach Discussion / Problem with round letters
« on: January 08, 2016, 07:11:46 AM »
Hi!

Im drawing in CorelDraw, than I create toolpath in ArtCAM which I use on MACH3.
Im using EndMill 2mm.

Mach 3 settings:

Velocity: 600
Acceleration: 140

My problem is that machine causes those weird errors on round letters like you can see on pictures.
Some of letters like ''D'' are perfectly shaped in the other hand there are lettery ''O'' and ''F'' with those errors.

I tryed changing velocity and acceleration  but problem stays the same.

Does anyone know how to solve this problem ?

Please help!

Thanks
Good letter:


Bad letters:


Pages: 1