Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: Stef on June 21, 2007, 10:44:51 AM

Title: Z-axis going down, but not programmed
Post by: Stef on June 21, 2007, 10:44:51 AM

In a program z-axe start at a save position, then going to Z-0.2.  After this G01 movement in X- and Y-axis.
After a while Z-axe is going minus, but it is not programmed. Z-axe keeps on going down  ??????

Title: Re: Z-axis going down, but not programmed
Post by: Chip on June 21, 2007, 02:32:08 PM

Hi Stef

What ver. Mach3, Post your code, Someone will look at it.

Thanks, Chip

Title: Re: Z-axis going down, but not programmed
Post by: Stef on June 22, 2007, 02:47:59 AM

Hi Chip,

We are working with mach2
We work on the machine with step-direction steppermotor without encoders.

Stef

Title: Re: Z-axis going down, but not programmed
Post by: Hein on August 18, 2007, 12:38:42 PM

Hello,

The problem above, is the problem with my machine.
The z-axe is going down faster and faster in the matertial, until, ...

Sometimes its works perfect, and sometimes its going wrong.
I have no idea whats happend.

This is my code:

Code: [Select]

G21
G0 G17 G40 G49 G80 G90
G61(CONSTANT CONTOUR OFF OR TURN ON W/G64)
M07(Cooling ON)
(2 1/2 Axis Pocketing)
G55
S1000 M03
G00 Z1.5000
X0.0000 Y-2.2500
G01 Z-0.6000 F30.0
Y0.0000 F50.0
X130.0000
Y-3.0000
X0.0000
Y-2.2500
X0.7500
Y-0.7500
X129.2500
Y-2.2500
X0.7500
G00 Z1.5000
X0.0000
G01 Z-1.2000 F30.0
Y0.0000 F50.0
X130.0000
Y-3.0000
X0.0000
Y-2.2500
X0.7500
Y-0.7500
X129.2500
Y-2.2500
X0.7500
G00 Z1.5000
M05
M30

I hope that someone can help my, it's verry urgent.

Thanks a lot.

Hein

Title: Re: Z-axis going down, but not programmed
Post by: Chip on August 18, 2007, 05:24:15 PM

Hi, Hein

Try this.

G21
G17 G40 G49 G80 G90 ;-----------------------------------------Removed the G0 in this line of Code
G61(CONSTANT CONTOUR OFF OR TURN ON W/G64)
M07(Cooling ON)
(2 1/2 Axis Pocketing)
G55
S1000 M03
G00 Z1.5000
X0.0000 Y-2.2500
G01 Z-0.6000 F30.0
Y0.0000 F50.0
X130.0000
Y-3.0000
X0.0000
Y-2.2500
X0.7500
Y-0.7500
X129.2500
Y-2.2500
X0.7500
G00 Z1.5000
X0.0000
G01 Z-1.2000 F30.0
Y0.0000 F50.0
X130.0000
Y-3.0000
X0.0000
Y-2.2500
X0.7500
Y-0.7500
X129.2500
Y-2.2500
X0.7500
G00 Z1.5000
M05
M30

Hope this Helps, Chip

Title: Re: Z-axis going down, but not programmed
Post by: sawmill on August 19, 2007, 03:48:50 AM

one thing that was a problem with me was i had a tool offset set up in the tool table, so i would set my height for z then when the program ran it would do my hieght and add the tool hieght also, i manualy change bits, so i removed the tool hieght from the tool table, problem fixed.
dan

Title: Re: Z-axis going down, but not programmed
Post by: Hein on August 19, 2007, 06:09:29 PM

Hello,

I have removed the G0 code, but the problem is the same.

I have no idea.   ???

Thanks for the help.

mvg

Hein

Title: Re: Z-axis going down, but not programmed
Post by: Chip on August 20, 2007, 02:34:41 AM

Hi, Hein

Try setting you Velocity & Acceleration down in Motor Tunning or Edit your G0's to G01, Your Z up may be slipping causing pos. loss.

Thanks, Chip

Title: Re: Z-axis going down, but not programmed
Post by: Graham Waterworth on August 20, 2007, 04:06:53 AM

This is sounding more like pull down.

Is the tool fixed in the holder tight.

Is the Z axis moving down with vibration and cutter pull down. Fix a dial clock on the machine to monitor the Z movement.

Graham.