116
TRAK Machine Tools
Southwestern Industries, Inc.
TRAK 3ntr 3D Printers
–
Maintenance & Troubleshooting Manual
Figure 6.41.3 Safety Switch on Z Arm Assembly
5)
Lock Z safety switch at highest position possible
6)
Route Z safety switch cable along with existing Z sensor cable, until reaching the motherboard.
7)
Connect Z safety switch to ZMAX pins (at the right of existing Z min switch)
8)
From LCD menu, run the Z homing command. BE SURE THAT TRAY IS CORRECTLY PLACED INTO
MACHINE
9)
Move Z plate down 0.5mm
10)
Release (1) and (2) screws, slide down sensor until tip (3) touches the Z holding part.
11)
Lock safety switch into this position using screws (1) and (2)
12)
Test Z homing with tray in place.
13)
Z offset test print must confirm actual setting.
14)
Test Z homing without tray in place: safety switch will cause homing to keep nozzles away from
heated plate.
6.42
Z Safety Switch is triggered
–
machine is locked
This is an expected behavior to save machine from crashing plate against nozzles.
To regain control of the machine, lift the Z switch assembly (step #5 of Z switch mounting procedure) then
check reason for triggering, that could be one of the following:
•
Lack of printing tray
•
Z arm servo KO
•
Z arm sensor KO
•
Part on plate preventing arm deployment
Once problem is fixed, perform Z safety switch calibration.
6.43
Appendix A
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Testing for Shorts (Continuity)
You may want to be sure that current is flowing (i.e.: fuse) and sometimes you want to be sure it isn
’t
(i.e.:
between machine frame and any power lead). In both cases, you need a multimeter.
Let’s see hot to test a fuse:
Set you multimeter into “continuity” mode.
Some models will also emit a sound when current can flow.
