Messages

1

General Mach Discussion / Re: Moving off Limit switch

« on: May 06, 2008, 02:04:37 PM »

Is there a way to move off the limit switch without turn on the LIMIT OVERRIDE?

2

General Mach Discussion / Re: Moving off Limit switch

« on: May 06, 2008, 01:59:52 PM »

I don't think software limits are trustable, because its easy to zero the axis in the middle of the movement then the machine will hit limit switch because the software limit will never reach.

There's a error in MACH 3, as I told before if X++ switch is reached the machine should not move more to X+ (This happen when tick Auto limit Override)

For me MACH3 deals with limit switch like an emergency stop (This is wrong), and I'm a idiot to use 4 pins for limit switch (it's better to tied the 4 limit switchs on only one parallel pin, thats because the MACH3 will stop the machine, and he doesn't have the capacibility to know what movement (+ or -) triggered the Limit switch.

3

General Mach Discussion / Linear Scale on close Loop

« on: May 06, 2008, 01:04:08 PM »

I Installed 2 linear scales on my CNC ROUTER, but I have a question:

1- The Linear Scale works on close loop with MACH3?, feeding the MACH3 and making the movements more accurated. Or the Linear Scale is just for show the position.

4

General Mach Discussion / Moving off Limit switch

« on: May 06, 2008, 12:53:17 PM »

I put 4 limit switch (X++, X--, Y++ and Y--) on my CNC router, but for example: If X++ is triggered the RESET button starts to blink and I can't move to X- for moving off the limit switch?
I read the past posts and someone told to turn on the Limit override, but this is not good because when LIMIT OVERRIDE is on the X axis move + and - destroying the limit switch. ( If X++ limit switch is trigger the X axis cannot move to X++)

Is there a way to move off the limit switch without turn on the LIMIT OVERRIDE?

5

General Mach Discussion / Re: How to config a linear scale?

« on: April 22, 2008, 08:34:48 AM »

Ok I will take the pins of the linear scale DB9 connector (only A, B, 5VCC and GND).
For the source I used the 24VAC that source de Motors Drive and a bridge rectifier , LM7805 and some capacitors to make 5VCC. 

6

General Mach Discussion / Re: How to config a linear scale?

« on: April 22, 2008, 06:45:19 AM »

Hi Hood

Sorry instead of R is Z pin, I read on datasheet that this pin is used to reference or zero pulse.

7

General Mach Discussion / How to config a linear scale?

« on: April 17, 2008, 02:38:12 PM »

How to config a linear scale ? I know the pins on parallel port (A pin9 , B pin10, R pin11) but I dont know where I should put these pins numbers to make the scale works.
I tried to config on Config -> Port and pins -> Encoders/MPG's (A-Port # and B-Port #), but nothing happened.

8

General Mach Discussion / Re: Using linear glass encoder

« on: April 04, 2008, 02:53:53 PM »

Ok, thanks a lot. 

9

General Mach Discussion / Using linear glass encoder

« on: April 04, 2008, 02:16:34 PM »

        I'm buying an linear glass encoder to use with X and Y axis (5um , A and B TTL signals). Someone knows if Mach3 can read the linear encoder outputs with I use an feedrate value of 500 units/min (mm/min)?

         I'm afraid of that using feedrate values such high like 700mm/min, the linear glass encoder output frequency (A and B) too high, that parallel port can't read these signals.