thanks Ray turns out that it was the FERROR and MIN_FERROR that were the source of the problems. One more question: how do I setup backplot so that the colours change acording to spindel motor on/off /reverse state as I mill PCB's and its hard to see green aginst yellow ? thanks Jason Cox On Thu, 2003-01-16 at 06:33, Ray Henry wrote: > > > Hi Jason > > Sorry to take so long to get back to you. I've been wrestling with a > Mazak spindle motor and drive. > > This is a rather common complaint with freqmod. It can be caused by one > of several things. > > One is a metric definition for the units variable. To fix this you need > to multiply the following error values by 25.4. > > Another is the default acceleration of 20. Set this back to 5 or less > and then set max_velocity in [TRAJ] a bit higher than you set it for the > same variable name in any axis definition. What happens is that during > acceleration some steps get put into following error and don't get a > chance to be fed back into the running axis. > > A third problem can be the P parameter. I'd start with this around 300 > and then shift up or down depending on how a real motor sounds. If you > don't have a motor connected you can set it as high as you like. > > Hope this helps. > > Ray > > > > On Wednesday 15 January 2003 02:25 am, you wrote: > > hi all, > > finaly got all the hardware up for my axis's. all 3 are stepper motors > > and and operate correctly. > > The system is a 1.2GHz Duron with MDK9.0 (2.4.19-16mdk) with RTAI > > 24.1.10 ( I've got a patch if you need ?). > > The Problem is that it will run fine in a positve direction but running > > back to Y0 causes a following error. Is it just more tuneing ? > > > > also has anyone got a patch to direct the IO_BASE_ADDRESS to a device > > so that I could experiment with USB2.0 ? > > > > Thanks > > Jason Cox > > >
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