Topics

11

General Mach Discussion / Optical sensors for homing and pause buttom

« on: May 06, 2010, 03:57:26 PM »

Hello
I have four  optical sensors from a dot printer,
I want to use for a homemade embroider cnc machine , this haves a three wires , one in each sensor, and one common, all comes soldered in a small card,

Three sensors are for homing, I suppose than this will be connected to inputs in pins 13-15

Another  one is for thread break.
I want to configure sensor for thread break to push FREE HOLD buttom, to pause work when thread breaks or finish. Is possible to do that?

Can you help me to connect this to my controller?
I have a  HobbyCNC Pro four axis contrioller board.

Thanks in advance.

Rene

12

General Mach Discussion / OPERATING MACH 3 GCODE LINE BY SWITCHES

« on: May 05, 2010, 11:49:36 PM »

Hello, I am cnc controlling a sewing machine for doing embroidery work, Until now, Gcode Works in this way X and Y axis moving hoop , and Z axis controls needle movement.
Z axis works in this way
One revolution = Z=1.00
Small movement from Z=0 , until needle is 5mm aprox above hoop Z= 0.2 (Coming inside fabric)
Small movement from Z= 0.2 until needle is 5mm above hoop Z= 0.8 (Coming outside fabric)
for example
G00 X0.00 Y0.00 Z0.2 (Hoop and needle moving togheter)
G00 Z0.8
M786 (Macro reseting  Z values to cero)
G00X1.0 Y1.3 Z0.4 (From position Z=0.8 to previous position Z=0.2)
G00 Z1.00 (Completing revolution)
In this work Needle movements are in steps and thread is over tensed and in occasions loosed.
Original Embroidery machines, works in different way, because pulley is always in movement and hoop moves are only  in the interval when needle is going outside from fabric, and GCODE line for X and Y movements (hoop) should be concluded before needle arrives to   position previously called Z= 0.2 , (at 3-5mm above fabric). Of course than needle speed movements is in relationship with Z and Y velocity for hoop movements, and is X and Y are slow, then Needle movements or stitches per minute are a small quantity.
What I need to know. I need to move wheel and needle continuously, like write before, in this case needle velocity movement should be like a spindle velocity, and X and Y lines should operate only when needle is out of fabric. I can put a optical sensor in wheel to know when needle is out of fabric and initiate hoop movements in this movement, but I need to know how can I tell MACH, that this is the moment to move one Gcode Line.
In other word, optical sensor, will manage every gcode line for X and Y movements.
Is possible to send these commands to Mach 3?
Thanks in advance and sorry my bad English
Regards
Rene

13

G-Code, CAD, and CAM discussions / PROBLEMS with G00 and G01.

« on: April 02, 2010, 10:50:22 PM »

I am running a GCODE, for operate  wheel of sewing machine in an embroider project.
In this moment Iam using Z axis for this movement,  until I change for A axis.

My set up of Z axis is in this way

Steps x Revolution = 800 (200- ¼ microstep)
Mm x revolution = 10 (simulated)
Steps x MM = 80.

Vel    3000 mm/min
Accel = 500 mm/sec/sec

I created  two variants of CGODE Lines

For two variants F = 3000

1-G00 Z10----------In this case 100 first lines runs in 59 secs
2- G01 Z10---------In this case 100  first lines runs in 45 secs.

I think that  GCODE with G00 in Z movements should be more faster than second variant.

What do you think about that?

Thanks in advance, sorry my bad English.

Regards

Rene

14

General Mach Discussion / MACH REQUIREMENTS IN DIY CNC CONTROLLER CARDS

« on: April 01, 2010, 03:28:31 PM »

Hello

I have a doubt, I want build a cheap controller, but I don't know  if Mach 3 need specially requeriments in electronic components or card configuration. Someone told me something about id Mach works only with PICS, finally I don't understand this.

I don't want to build a controller and later don't use it....

Please, Help!!

Thanks in advance and sorry my bad english.
Regards

Rene

15

G-Code, CAD, and CAM discussions / SET UP A AXIS IN ONE DIRECTION

« on: March 15, 2010, 03:31:31 PM »

Hello , I'm new in Mach3  forum...

Mi question is this,,, Iam tryng to set up A axis in MACH3.

I need to run a code like this

G01 X-8.8 Y-10
G00 A359------ (turn 359 degree)
G00 A0 ----------(turn in same direction 1 degree until  360 degree ---- --the counter in now in 0 (cero))
G01 X-17.5 Y-19.9
G00 A359 -----(Turn 359 degree-)-
G00 A0

This is to move the wheel of sewing machine to cnc  embroid...

Original topic
http://www.cnczone.com/forums/showthread.php?t=57404

How can I setup A AXIS, to run in one direction, and reset counter to cero?

Thanks in advance

Rene