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Warranty, Specifications, Customization and Troubleshooting
Possible Cause
Bad Capacitor for DC
Bus Board
Axes Drive Sub-System Checklist
Table 4.5
Axis movement is extremely noisy
ProbAction to identify Cause
Discussion
ability
of Problem
Low
On 4 digit serial number
This step is not required for 3 digit
machines, turn off control serial number machines.
power, and unplug the
lower connector (contains
6 wires all labeled with
300 series numbers) from
all of the electronic axis
modules.
With the cabinet door
Observe the green LED on the DC
open, turn on control
Bus Board illuminate.
power
While observing the green If the LED extinguishes in 2 seconds
LED on the DC Bus
or less, the capacitor is bad and must
Board, press the Stop
be replaced.
button.
If the LED takes 5 seconds or more
to extinguish, the capacitor is good.
If the results are not
conclusive, turn off
Control Power and unplug
the power connectors from
the axis drives
Turn on control power and
measure DC voltage on
wires 300 (common) and
301.
Turn off Control Power
and plug the power
connectors back on the
axis drives
Turn off power and tighten
all screw connections
Loose wire connection
High
Bad stepper driver
module
Medium
See Table 4.2
Wrong version of Mach
3 for given machine
configuration
Failing control
computer, or control
computer not suited for
M3
Medium
Contact Tormach Support
Low
Run DriveTest.exe found
in the c:\pcnc3 folder
Using Tormach PCNC 1100 Series II
9-38
A DC voltage of a nominal 65 VDC
(55-75) indicates the capacitor is OK
A DC voltage of a nominal 40 VDC
(35-45) indicates the capacitor is
defective.
There have been cases of a noisy axis
relating to a bad driver. This may be
temperature dependant.
Some versions of Mach 3 release by
Tormach are not compatible with all
machine configurations
A Flaky computer, or one that is not
suited to run real-time software such
as Mach3 will not produce smooth
step signals for good axis motion.
31138 Rev B1-4