Swing: assembly

Also see:

Safety warning

  • Lasers can damage your eyesight.

    Never look into a laser. Never point a laser at anyone.

  • Keep small objects, especially batteries, away from young children.

Initial advice

Swing assembly is straightforward (and enjoyable) - you should be up and running in under an hour.

Experience shows there are a number of fundamental rules when building something:

  1. There is no such thing as "a five minute job".
  2. If it can go wrong, it will go wrong.
  3. If there is a "right" way to fit something you will try all the "wrong" ways first.
  4. There will always be bits left over.
  5. There will never be enough bits.
  6. Rules 4 and 5 are not contradictory.

So, work slowly, carefully and methodically (one step at a time) to avoid stress and screaming!


Kit contents

If your purchased the basic kit you will have:

  • Metal enclosure: top, base and bracket.
  • Laser cable and laser holder.
  • Bubble level.
  • Electronics Printed Circuit Board (PCB)
  • Pack of screws, nuts, spacers, grommets, acrylic spline block and rubber feet.
  • USB cable.

If your purchased the full kit you will also have:

  • Two Hitec HS-322HD servo motors.
  • One Soshine RCR-123 16340 Li-Ion 700mAh 3.7V battery.

You will also need

  • One small Phillips screwdriver - for the small screws that go into the servo motors.
  • One No 1 Pozi screwdriver - for mounting the PCB and servos and for assembling the base.
  • Scissors.
  • Some sticky tape.

A 5.5mm nut spinner is ideal (but not essential) for the 3mm nuts we use.

Grinding down the tip enables it to be used where the nuts are close to other components.


Step 1

  • Peel the backing paper from both sides of the 3mm acrylic spline block.
  • Secure the spline block to the horizontal servo bracket using two 3mm x 4mm countersunk Pozi screws and nuts
  • Push the grommet into place. Note: do not use a metal object to do this - it will mark the paintwork.

Step 2

  • Use a strip of sticky tape under the hole in the top of the base to secure the spirit level in place
  • Push the grommet into place. Note: do not use a metal object to do this - it will mark the paintwork.

Step 3

  • Put a 3mm x 5mm nylon spacer on the each 3mm stud.
  • Check you have the PCB the right way round - so the three LEDs go through the holes in the top.
  • Fit the PCB (battery holder downwards) and secure with four 3mm nuts.

Centring the servo motors

Now is the time to centre the servo motors before continuing assembly:

  • Ensure the on/off switch is in the "Off" position - switch towards the spirit level.
  • Connect one servo motor cable to the three pin socket labelled "H" on the PCB.

    The black wire goes to "-", the red wire goes to "+" and the yellow wire goes to "S".

  • Connect the other servo motor cable to the three pin socket labelled "V" on the PCB.
  • Insert the battery into the battery holder - check it is inserted the correct way round!
  • Set the on/off switch to "On".
  • The red LED will start flashing as soon as the motors are centred.

    The LED will flash for 5 seconds as Swing holds the motors in the central position.

  • Set the on/off switch to "Off".

    Important: you must switch off within the 5 second limit or Swing will enter demonstration mode and start moving the motors away from the centre.

  • Unplug the motors and remove the battery.

Step 4

  • Fit the horizontal servo motor using four 3mm x 10mm pan head pozi screws and nuts.
  • Check you have the servo motor the correct way round - see image above.

Step 5

  • Fit the vertical servo motor bracket by pushing it into place on the servo motor.

    Try to ensure that the bracket is parallel to the edges of the servo motor and metal top - as shown.

    The male and female splines may not permit perfect parallel alignment - but don't worry about this - the software will allow for any misalignment.

  • Secure the bracket in place with the black 2.5mm self tapping screw

Step 6

  • Fit the vertical servo using four 3mm x 10mm pan head Pozi screws and nuts.
  • Check you have the servo motor the correct way round - see image above.
  • Pass the servo cable down through the grommet in the bracket and down through the grommet in the top of the base.

Step 7

  • Insert the laser into the laser holder.

    Push it firmly in then secure the cable using the miniature cable tie which you should trim short after fixing

  • Fit the laser holder onto the servo by pushing it into place.

    Try to ensure that the holder is parallel to the edges of the servo motor - as shown.

    The male and female splines may not permit perfect parallel alignment - but don't worry about this - the software will allow for any misalignment.

  • Secure the bracket in place with the black 2.5mm self tapping screw
  • Pass the laser cable through the hole in the front of the vertical servo bracket, down through the grommet in the bracket and down through the grommet in the top of the base.

Now to wire up the cables.

  • Connect the horizontal servo cable to the three pin socket labelled "H" on the PCB.

    The black wire goes to "-", the red wire goes to "+" and the yellow wire goes to "S".

  • Connect the vertical servo cable to the three pin socket labelled "V" on the PCB.
  • Connect the laser cable to the two pin socket labelled "L" on the PCB. The black wire goes to "-" and the red wire goes to "+".
  • Insert the battery into the battery holder - making sure it is inserted the correct way round!

Step 8

  • Slide the base into place and make sure you have access to the USB port and on/off switch.
  • Secure the base to the top using 4 x 2.5mm Phillips self tapping screws.
  • Stick the feet to the base after peeling off their backing.