Guest
Show Posts
81
General Mach Discussion / homing limits problems
« on: February 28, 2008, 05:57:20 AM »
Hello
I`m a newbe, and can`t figure out how it works. I have a homebuild 3 axis machine and I want to make some test mills, but the safety comes first.
I have 3 normaly open home switches signed to pins 10, 12 ,13, and 3 normaly closed limit switches in series - pin 11.
1. When I hit one of the switches, I can still move the steppers with arrows and page up/down buttons - is that normal?
I just want the machine to stop when it hits one of the switches - when I use arrows buttons and I can`t.
I want to be shure that the switches are working before I start to mess with software limits.
As I said I`m a newbe and I don`t know how it`s supposed to work, but are all the switches a kind of e-Stop switches? Or the home swiches has to be activated/pressed when homed?
2. In the Input Signals window I have only marked the X Home, Y Home and Y Home, but what is the X++ and X- for?
Is X++ the limit and X- the home switch?
3. Is there a field where I can type the pitch of the lead screw? That`s because when I type G0 X5 the x axis is moving about 8cm??
My motors are 200 steps per revolution but I run 1/2 step. That gives 400 steps per rev. My lead screw has a pitch of 1mm, so I typed 400 in the "Steps pr unit" field. But the software doesn`t know abouth the lead screw pitch, does it?
Thanks
Adam
I`m a newbe, and can`t figure out how it works. I have a homebuild 3 axis machine and I want to make some test mills, but the safety comes first.
I have 3 normaly open home switches signed to pins 10, 12 ,13, and 3 normaly closed limit switches in series - pin 11.
1. When I hit one of the switches, I can still move the steppers with arrows and page up/down buttons - is that normal?
I just want the machine to stop when it hits one of the switches - when I use arrows buttons and I can`t.
I want to be shure that the switches are working before I start to mess with software limits.
As I said I`m a newbe and I don`t know how it`s supposed to work, but are all the switches a kind of e-Stop switches? Or the home swiches has to be activated/pressed when homed?
2. In the Input Signals window I have only marked the X Home, Y Home and Y Home, but what is the X++ and X- for?
Is X++ the limit and X- the home switch?
3. Is there a field where I can type the pitch of the lead screw? That`s because when I type G0 X5 the x axis is moving about 8cm??
My motors are 200 steps per revolution but I run 1/2 step. That gives 400 steps per rev. My lead screw has a pitch of 1mm, so I typed 400 in the "Steps pr unit" field. But the software doesn`t know abouth the lead screw pitch, does it?
Thanks
Adam