Before You Start

• Place the machine on a stable workbench with enough room on all sides.
• Do not cut the zip ties holding the X module until the foot pads are installed and the X module is secured.
• Keep the ceramic calibration disc in a safe place. It is small and will be used later for calibration.
• Check all cables during assembly, especially camera USB cables, motor cables, and limit switch cables.
• After assembly, complete the OpenPnP setup and calibration guide before production placement.

1. Package Overview and Assembly Sequence

This video explains what has been disassembled for shipping and what needs to be reinstalled after delivery.

Key Points

• The QB V4 is fully assembled and tested before shipping, then partially disassembled to reduce shipping volume.
• The main parts to reinstall are the foot pads, the X-axis module, and the X-axis motor.
• The X module is still connected to the machine by a wiring harness. Do not let it fall or pull on the cable.
• Do not cut the shipping zip tie until the foot pads are installed.
• The ceramic disc included in the accessories is used later for calibration. Do not lose it.

2. Foot Pad Installation

Install the four foot pads before cutting the zip tie that holds the X module to the main unit.

Steps

1. Turn the machine over carefully so the bottom side is accessible.
2. Keep the X module tied to the main unit during this step to prevent it from falling and pulling the wire.
3. Screw the four foot pads into the threaded holes at the four corners.
4. Check the bottom camera connector. If it was unplugged for shipping, plug it back in.
5. If your machine includes tape feeder stacks, identify the front and rear take-up motor wires for later installation.

The higher foot pads help the machine clear the tape tray height, making tape feeding smoother.

3. X-axis Module Installation

This video shows how to mount the X-axis module onto the Y-axis sliders and keep the module square to the machine frame.

Steps

1. Do not cut the slider zip ties before the module is installed. They prevent the sliders from falling out of the rail.
2. Remove the two screws from each slider. Keep the longer screws separate so they return to the correct holes.
3. Orient the PCB correctly. The side with four dots faces the front of the machine.
4. Make sure the camera and placement head face the front.
5. Align the closely spaced mounting holes with the slider hole spacing.
6. Use the machine support as the reference edge and make the guide rail flush with it to keep X and Y perpendicular.
7. Reinstall and tighten the screws, then check that the X-axis movement is smooth.
8. After the module is secured and motion is smooth, cut the zip ties that block the sliders.

4. X-axis Motor Installation

Install the X-axis motor, place the timing belt onto the pulley, and check the wiring before tightening everything.

Steps

1. Install the motor with the terminal facing outward.
2. Place the timing belt onto the motor pulley before tightening the four motor screws.
3. Leave the four screws slightly loose at first so belt tension can be adjusted later.
4. Plug the motor cable into the motor terminal.
5. Check the placement head wiring, especially the top camera USB cable if it was unplugged before shipping.
6. Check other visible cables, including the Y-axis limit cable.

5. Electric Tape Take-up Installation

If your QB V4 includes tape feeder stacks, use this video to install the cover tape take-up mechanism.

Steps

1. Install the passive take-up bracket first. It can be inserted from either end.
2. Install the take-up wheel.
3. Install the motor-side bracket on the right side when facing the machine.
4. For rear feeder stacks, use the rear motor-side bracket. Its mounting hole is larger to clear the motor bracket under the rail.
5. Insert the coupler onto the motor shaft and tighten the screw. If the screw is not tightened, the wheel will not rotate.
6. Place the tape reel in the tray box with the side containing the holes facing left when facing the machine.
7. Pull the cover tape through the correct opening, wrap it around the wheel, and tie it twice to secure it.
8. Plug the prepared control wire into the DC motor.

The take-up wheel should pull the cover tape downward. If it rotates upward, swap the two DC motor wires to reverse the direction.

6. Sensorless Homing and Belt Tension Adjustment

QB V4 uses sensorless homing for the X and Y mechanical origins. Correct belt tension is important for reliable homing, low backlash, and stable motion.

Why Belt Tension Matters

• If the belt is too tight, the motor may detect high resistance too early and stop before reaching the real mechanical limit.
• If the belt is too loose, the axis may keep pushing after reaching the mechanical limit and backlash will increase.
• If the belt is too tight, the motor can lose steps, which also increases positioning error.

How to Measure

1. Turn off the machine and move the head/module to the edge.
2. Hook the supplied tension meter to the middle of the belt span.
3. Pull perpendicular to the belt until the meter reaches 10 N.
4. At 10 N, the two belt runs should just touch each other.
5. If they cannot touch at 10 N, the belt is too tight.
6. If they touch before 10 N, the belt is too loose.
7. Adjust tension with the pushing screw, then tighten the four motor screws after the tension is correct.
8. Use the same method for the Y-axis belt.

7. Computer Connection

This video shows how to connect the machine to the computer and which cable ties must stay in place.

Key Points

• Do not cut the two zip ties on the drag chain. They secure the wire bundle to prevent shaking during high-speed movement.
• If the USB cable shakes for a long time, the port can loosen and the camera signal may become unstable.
• Connect the included power cord to the power input.
• Only one USB cable is needed to connect the machine to the computer.
• The motherboard includes a hub chip. The controller and both cameras connect through this hub.
• You may connect the USB cable before or after turning on machine power.

After Assembly

After completing the mechanical assembly, continue with OpenPnP setup and calibration before running your first placement job.