Bend-Tech DRAGON A150, Maintenance & Troubleshooting

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69 Bend-Tech Dragon A150 Troubleshooting Guide
Limit Switch Operation
15
A150 Updated Limit Switches
Newer Dragon A150 models will have individual limit switches that can be diagnosed in Mach3.
On newer A50 machines the Control Box will have three separate inputs for the machine’s limit
switches.
Diagnosing Limit Switch Issues On Newer Dragon A150 Machines
To diagnose a limit switch issue on a newer
Dragon A150, in the Mach3 home interface,
choose the Diagnostics tab. If a limit switch
is triggered, Mach3 will indicate this in Input
Signals Current State. A limit switch that is
triggered will be lit in yellow in Mach3.
X and A Axis Limit Switch Failure
The X and A axes on the Dragon A150 use micro switch style limit switches. The limit switches
are triggered when the Toolhead assembly makes physical contact with the limit switch. In the
case of the A axis, when the A150 machine powers off suddenly such as when an E-stop is
activated, the spring assemblies that help keep tension on the Toolhead will pull the Toolhead
up and cause it to slam into the limit switch. This can lead to failure of the A axis limit switch.
While it is possible for either switch to fail, because of the spring tension on the Toolhead it is
more common for the A axis to fail.
X Y Z
PARALLEL PORT
POWER
ON
OFF
CHARGE
PUMP FAULT
X AXIS Y AXIS Z AXIS A AXIS
Machine Axis Mach3 Input
X
M1
Y
M2
Z
M3
XYZ Limit
Switch Ports