Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Rocketmagnet on February 23, 2007, 08:02:47 AM
-
Hi all,
I'm trying to get 5 axes to work on Mach 3.
They are all on the same parallel port.
X, Y, Z and A work fine, B does nothing.
The motor definitely works, because, if I swap the A and B pin assignments, then I can get that motor to move.
I am using the 6 axis screen set.
As far as I can tell, the B axis is enabled.
I have set up hotkeys for the B axis, but it still won't go round.
Please help. Is there something I'm missing?
Many thanks
Hugo Elias - Shadow Robot Co Ltd
-
What pins have you got assisgned to what function/motor/driver?
Graham.
-
Hi Graham,
When I have pins 9 & 8 assigned to A, and 17 & 16 assigned to B, then A works, and B does not.
When I have pins 17 & 16 assigned to A, and 9 & 8 assigned to B, then A works, and B still does not.
I am using the 6 axis screens. When I run the command G00A10B10, the DRO for A changes on the
screen, but the DRO for B stays at 0.000.
The B axis is enabled in the "Ports and Pins" control. And I can tune the B axis. All the lights and controls give the impression that X, Y, Z, A and B are active, and C is inactive.
Is there somewhere else to enable this axis?
Many thanks
Hugo
-
It sounds more like the B axis driver card is not enabled if mach will drive A from eather pin combination.
Graham.
-
I'm not sure what you mean. Are you talking about a hardware of software thing?
I'm pretty sure this is not a hardware problem. This is because by changing the pin numbers, I can make either motor move. So all of the hardware is working fine.
Or are you refering to an option within Mach 3?
Hugo
-
Sorry I misunderstood,
Are you running the demo version?
Graham.
-
yes.
-
If you set Mach to offline mode (led will flash) then go to MDI and type G00 B20. dose the DRO move?
Graham.
-
No, nothing seems to move in offline mode. None of the axes.
When I type G00A20B20, nothing moves at all.
When I turn off offline mode, then A works again, but not B.
Hugo
-
I think I got it. Somehow I had got axis B slaved to axis X.
I discovered this when I jogged the X axis, and found that both of them moved.
Thanks for yout time.
Hugo