Stepper motors are still going at the incorrect speed. Need help with Mach3
I have this system on a plasma table.
Cut area 3m x 2m
Geckodrive G202's
48Volt 13amp power supply
Running two 1200oz-in steppers on the x axis.
And one 270oz-in stepper for the y axis.
Using CorelDRAW, AutoCAD, SheetCAM and
Mach3.
The motors are all tuned up right. They have the correct steps per unit etc.
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The problem:
If the velocity is set to 10,000mm/min in the 'motor tuning' page for both the x
and y
axis. And I go and jog the gantry in the y axis it will move along at the correct
speed of 10,000mm/min. This will be shown in theDRO.
But, if I jog with the x axis the motors will move at 14,000mm/min instead of the
10,000mm/min that was setup in the 'motor tuning' page. This problem will also
happen if I run a g-code through Mach3. Say for example I run a square shape.
The feed speed will be set on 5000mm/min. The y axis will feed correctly at the
set 5000mm/min. The x axis will move faster than the set speed that it is meant
to. It will move at 7000mm/min instead of the 5000mm/min required.
I have checked that the speeds that the DRO are reading are correct.
How I done this was, Made the machine run for a distance of 1meter and counted how
long it would take to travel the 1meter.
From those results it showed that the DRO are giving me correct readings.
I have alos cut out a part in 10mm steel with the plasma. You can see how the
edges are smooth and perfect, then the gantry
makes a right turn and the x axis starts driving. The x axis moves faster than
the y axis and therefore the cut edge is very poor.
I am only a newbie to this so I have tried everything that I can think of.
I wiped all traces of Mach 3 then reloaded Mach3 again. Making sure to re-boot
after the instalation.
So I am stumped as to what is going on.
Can anyone help?
P.s on the gecko's I adjusted a 'trimpot' which is the 'low speed vibration'
trimpot screw. Maybe this has effected the motors etc...
I adjusted the screw at the back of the Gecko untill the vibration in my machine
went away.
Peter
Australia
