ooznest WorkBee CNC User manual

WorkBee CNC
Limit Switches & Wire Routing

WorkBee CNC 1
Table of Contents
1.0 Getting Started 3
1.1 Notes on Assembly 4
2.0 Limit Switches & Wire Routing 5
2.1 Limit Switches 6
2.1.2 Z-Axis Limit Switch...................................................................... 8
2.2 Wire Routing 9
2.2.2 Screw Driven - Gantry Wire Routing ............................................ 10
2.2.3 Belt Driven - Gantry Wire Routing ............................................... 11
2.2.4 Screw Driven - Y-Axis Wire Routing - Part 1 .................................. 12
2.2.5 Screw Driven - Y-Axis Wire Routing - Part 2 .................................. 13
2.2.6 Belt Driven - Y-Axis Wire Routing ................................................ 14

WorkBee CNC Getting Started 2
1.0 Getting
Started

WorkBee CNC Getting Started 3
1.1 Notes on Assembly
This manual has been written for the construction of a 750 x 750mm screw driven version
of the WorkBee. If you have a different version everything is exactly the same, with the
exception of longer V-Slot extrusions and wire routing.
It is recommended that you read through the whole manual before beginning the build in
order to get a full picture of the assembly process. Before beginning each step, make
sure you have studied the diagram and have the required parts in front of you. A PDF
version of the manual is available on our website and this will allow you to zoom in on the
diagrams if needed.
Be very careful to not over tighten the nuts and bolts on the plastic parts, otherwise they
may crack. Everything should easily fit together, and so if it isn’t, take a step back and
re-read the instructions.
Assembly of this kit involves the use of electricity and therefore you should take appro-
priate precautions to ensure you are assembling the kit in a safe manner. When following
wiring diagrams, double check that everything is connected correctly. Before carrying out
any work on the electrics make sure that the machine is switched off.
The polarity is indicated by the color of the wire, not by the color of the connectors at each
end. For the AC IEC input, the live wire is brown, neutral blue, and earth is green and yel-
low. For the DC Wiring of the machine a positive wire is red, negative is black, and earth
is green and yellow.

WorkBee CNC Limit Switches & Wire Routing 4
2.0 Limit
Switches &
Wire Routing

WorkBee CNC Limit Switches & Wire Routing 5
2.1 Limit Switches
2.1.1 X & Y Limit Switches

WorkBee CNC Limit Switches & Wire Routing 6
A. Carefully attach the Limit-Switch that was inserted in Section 2.1.5 to a Limit-Switch-
Plate using 2 x Plastite-Screw-M3-8mms. The Plastite-Screw-M3-8mms self thread,
the best technique is to screw in a couple of turns, then back out, and then back in a
few more turns than last time, and so forth, until the Limit-Switch is firmly secured.
Do not over tighten as you can shatter the switch. Make sure the Limit-Switch is ori-
entated as the Y-Axis-Limit-Switch-Assembly above. Finally attach a M5-Low-Profile-
8mm bolt, and on the end slightly thread a M5-Drop-In-Tee-Nut.
B. Repeat Step A for the last Limit-Switch, this one has not been inserted anywhere yet.
Note the different orientation as seen in the X-Axis-Limit-Switch-Assembly above.
C. Attach the Y-Axis-Limit-Switch-Assembly to the left hand Y-Axis C-Beam extrusion (if
looking from the front). It should be attached to the inner slot on the far end of the C-
Beam extrusion. The distance between the Limit-Switch-Plate and the end of the
extrusion should be 13mm.
D. Attach the X-Axis-Limit-Switch-Assembly to the back side of the X-Axis C-Beam extru-
sion. It should be attached to the top slot on the far left side (if looking from the
back). The distance between the Limit-Switch-Plate and the end of the extrusion
should be 10mm.

WorkBee CNC Limit Switches & Wire Routing 7
2.1.2 Z-Axis Limit Switch
A. Attach the Z-Axis limit switch to the threaded holes on the X-Plate-Front using 2 x M3-
Socket-Head-10mm bolts, in the orientation above. Do not over tighten as you can
shatter the switch.

WorkBee CNC Limit Switches & Wire Routing 8
2.2 Wire Routing
2.2.1 Z-Axis Limit Switch Wiring
A. The Z-Limit-Switch sits in-between two sets of wheels. Directly opposite there is a
hole. Feed the wires through this hole (Red circle above). Then as shown by the green
line above bring the Z-Limit-Switch wires up the X-Plate-Back, and feed it through the
X-Drag-Chain. Secure the wires using Cable-Tie-Smalls to the points marked with blue
circles above. To stop it snagging on anything the wire should be pulled taught.

WorkBee CNC Limit Switches & Wire Routing 9
2.2.2 Screw Driven - Gantry Wire Routing
A. For the stepper motor wire that is inside the X-Drag-Chain, connect it to the pigtail on
Z-Axis stepper motor. Making sure there is enough slack for the full travel of the Z-
Axis, secure the wire to the X-Drag-Moving-End-Mount using a Cable-Tie-Small,
shown by the small blue circle above.
B. The lead on the X-Axis limit switch should be secured to the V-Slot-2040-750mm
using a Cable-Tie-Large at the position shown by the blue oval above. Then run the
lead along to the other end of V-Slot-2040-750mm - it can be tucked into one of the
slots.

WorkBee CNC Limit Switches & Wire Routing 10
2.2.3 Belt Driven - Gantry Wire Routing
A. For one of the stepper motor wires that is inside the X-Drag-Chain, connect it to the
pigtail on Z-Axis stepper motor. Making sure there is enough slack for the full travel of
the Z-Axis, secure the wire to the X-Drag-Moving-End-Mount using a Cable-Tie-Small,
shown by the small blue circle above.
B. For the second stepper motor wire connect it to the pigtail on the X-Axis stepper
motor wire. Secure it to the X-Drag-Moving-End-Mount in a similar fashion as in Step
A
C. Connect a stepper motor wire to the pigtail on the right hand Y-Axis stepper motor (as
if looking from the front). Feed it through the square hole on the Y-Plate. The lead on
the X-Axis limit switch and stepper motor wire should be secured to the V-Slot-2040-
750mm using a Cable-Tie-Large at the position shown by the blue oval above. Then
run the wires along to the other end of V-Slot-2040-750mm - they can be tucked into
the slots.

WorkBee CNC Limit Switches & Wire Routing 11
2.2.4 Screw Driven - Y-Axis Wire Routing - Part 1
A. Connect the two stepper motor wires in the Y-Drag-Chain to the pigtails on the Y-Axis
stepper motors. In Section 2.1.5 Step B, one of the stepper motor wires will be longer
than the other, the longer wire should connect to the right hand stepper motor.
B. Secure the stepper motor wires to the Y-Axis-Fixed-End-Mount using Cable-Tie-
Smalls. The wire for the right hand stepper motor can be tucked into a slot on one of
the extrusions along the back.
C. Secure the lead on the Y-Axis limit switch to the Y-Axis-Fixed-End-Mount using a
Cable-Tie-Small.

WorkBee CNC Limit Switches & Wire Routing 12
2.2.5 Screw Driven - Y-Axis Wire Routing - Part 2
A. Connect a stepper motor wire to the pigtail on the X-Axis stepper motor and feed it
through the square hole on the Y-Plate
B. Inside the Y-Drag-Chain there should be two stepper motor wires (red above), a
power supply wire (yellow above), and a limit switch wire (green above). Feed all of
these through the square hole on the Y-Plate. Remove any slack inside the Y-Drag-
Chain, and then secure these 4 wires to the Y-Drag-Chain-Moving-End-Mount using
Cable-Tie-Smalls.

WorkBee CNC Limit Switches & Wire Routing 13
2.2.6 Belt Driven - Y-Axis Wire Routing
A. Connect a stepper motor wire to the pigtail on the left hand Y-Axis stepper motor (if
looking from the front) and feed it through the square hole on the Y-Plate
B. Inside the Y-Drag-Chain there should be a power supply wire (yellow above), and a
limit switch wire (green above). Feed all of these through the square hole on the Y-
Plate. Remove any slack inside the Y-Drag-Chain, and then secure these 2 wires to the
Y-Drag-Chain-Moving-End-Mount using Cable-Tie-Smalls.

WorkBee CNC Limit Switches & Wire Routing 14