Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: thedemri on January 20, 2013, 04:07:26 PM

Title: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: thedemri on January 20, 2013, 04:07:26 PM

Hi
I am using sige x2 converted mill with mach 3
I have tried to engrave letters and logo on dual colored plastic.
And I have noticed that the machine doesn’t finish the cut as it suppos to do.

As you can see form the screen picture , the letters have 90 degrees angels on the corners but the cnc is cutting it with a "short cut " to the next points.

(http://www.cnczone.com/forums/attachment.php?attachmentid=175470&d=1358689709)

(http://www.cnczone.com/forums/attachment.php?attachmentid=175471&d=1358689731)


The same is happening on the Z axis and it doesn’t finish the letters (or the logo).
I have tried to generate the code with the Lazycam and solidcam and the results are the same.
Any suggestion?

Thanks thedemri

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: Hal on January 20, 2013, 04:19:00 PM

Try turning on G61 and slow your feed rate a little.

Hal

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: thedemri on January 20, 2013, 04:22:39 PM

hi
thanks , I am a littel bit new be , how do i turn on the G61 ?

Thedemri

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: Hal on January 20, 2013, 04:49:20 PM

Put G61 in the start of your program. Check for G64 and delete

Hal

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: thedemri on January 20, 2013, 05:03:31 PM

Hi
Thanks
its engraving now and it look like it helped a lot!

I will put a picture in 30 minuets.

when do we need to use the G64 insted of the G61?

is there a place that i can put the G61 as a default?

Thedemri

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: thedemri on January 20, 2013, 05:42:51 PM

Hal
Thanks , it worked perfect!

(http://www.cnczone.com/forums/attachment.php?attachmentid=175509&d=1358721519)

I just spend a day and a half on this problem!  :-[

Thanks again Thedemri

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: Hal on January 20, 2013, 07:46:31 PM

I am glad you got your issue fixed.

G64 can be used for 3d work and roughing if there is enough stock being left.

Check your CAM system, you should be able to add it to your first safty block. If you are using the wizards type G61 in MDI before you start.
Somewhere in the Mach3 system setup may be a line to set G61 as default.

Hal

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: thedemri on January 21, 2013, 02:14:49 AM

Thanks Thedemri

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: BR549 on January 22, 2013, 11:24:16 AM

The solution is telling you that your acceleration setting for the axis's are slow compared to the Vel you are running.

(;-) TP

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: thedemri on January 22, 2013, 11:52:59 AM

OK
So I need to increase the acceleration valuse?

Thedemri

Title: Re: mach3 (?) - machine doesn’t finish the cut as it suppos to
Post by: BR549 on January 22, 2013, 04:33:28 PM

The slower accel values causes the CV to round corners to keep up. The exact stop G61 forces the tool to come to a stop before going to the next point.

You normally want the axis's to accelerate as fast as possible WITHOUT loosing steps. You may have to experiement to see just how fast that can be before loosing steps.

Just a thought, (;-)TP