On 2022/04/15 14:12, Rod Webster wrote:
Using the joint axis features correctly (using a drive for each motor)
which takes very little effort, you can square the gantry in software by
changing the HOME_OFFSET.
I understand that and if it is a new machine it's no problem. Upgrading
an existing machine that does not have home switches on both sides of
the gantry and that does not need squaring up, it's easy with just three
axis and not in joint mode. Many builders just put two drives on the
same set of signals to overcome this issue. I don't like to do that as I
have seen issues with drives that are situated a bit further away on
larger machines.
There are further complications as some machines don't have a Z axis for
instance. That makes it very difficult in joint mode as all the joints
have to homed before you can run the machine.
I understand that this might seem to be an odd situation but it is a
real one and there are many machines that need upgrade to Linuxcnc as
the Mach3 software on XP with parports are becoming a huge issue to
support. Most of those machines are build just like this and having a
simple solution to upgrade using the same hardware (BOB"S etc with 7i92
drop-in) is a real scenario.
Rod Webster
*1300 896 832*
+61 435 765 611
Vehicle Modifications Network
www.vehiclemods.net.au
On Fri, 15 Apr 2022 at 21:51, Marius <mar...@mastercut.co.za> wrote:
Hi
Just wondering why is it not possible to have a standard three axis
trivkins setup with a possibility to slave a stepgen to any one of the
axis.
So it is not part of the kinematics just slaved to the command signal of
any axis?
It is done in Mach3 and I have installed many machines that run like
that. So not in gantry mode but in a slaved mode. It is an acceptable
way of building routes etc.
It would be great if that was possible as there are many machines that
need to migrate to Linuxcnc using 7i92 cards to plug into the Mach3 BOB's.
_______________________________________________
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers
_______________________________________________
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers
_______________________________________________
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers
