A beginner's walkthrough for tuning a MASSO AC servo motor for the first time, using MASSO Motor Studio and the drive front panel.

Who this is for: anyone setting up a servo axis for the first time and tuning it from scratch. Before you start: the motor and drive must be wired and powered, and MASSO Motor Studio must be installed on a PC connected to the drive via USB. Work through the six steps below in order — each one depends on the last.

Overview — the six tuning stages

Each stage builds on the one before it. Don't skip ahead — a step later in the sequence (like auto-tune) won't give good results if an earlier one (like the inertia test) hasn't been done.

1. Jog the motor (Trial Run) — confirm the wiring between drive and motor is correct.
2. M.I. Guide — set pulses per revolution and configure inputs/outputs.
3. Update drive parameters — switch the drive into the correct control mode for tuning.
4. Inertia test — let the drive measure how much load (inertia) it's driving.
5. FFT check — scan for resonant frequencies before tuning further.
6. Auto-tune (F20-ADV) — run the drive's own auto-tune routine from its front panel.

1 - Jog the Motor — Trial Run

Reason: jog the motor to confirm the wiring between the motor and drive is correct before doing anything else.

• E-stop: pressed in
• Screen: Ready

1. Open MASSO Motor Studio and select Trial Run.
2. Disable the drive.
3. Set the RPM and acceleration.
4. Enable the drive.
5. Carefully jog left and right to check the motor turns both ways.

Popular settings

• Safe RPM: 300–800 (work up to it carefully).
• Safe acceleration: not less than 50. The lower the number, the faster the acceleration and the faster the motor stops.
• Be careful not to jog the axis past its physical limits.

2 - M.I. Guide — PPR & I/O Setup

Reason: adjust the motor's pulses per revolution and set up the drive's inputs and outputs.

• E-stop: in or out
• Screen: Ready or Run

1. Open M.I. Guide in MASSO Motor Studio.
2. Step through each stage of the guide.

3 - Update Drive Parameters

Reason: switch the drive into the mode where it uses the feedback signal to tune itself.

1. Open Parameters.
2. Select Pn01 from the group list on the left.
3. Change P01-03 to 19, then press the write button.
4. Change P01-02 to 1, then press the write button.

4 - Inertia Test

Reason: calculate the authority the motor has over the axis — how much load it's really driving.

• E-stop: pressed in
• Screen: Ready

1. Open Inertia ID.
2. Press Write, then press Next.
3. Press Enable, then press Turn until WRITE shows.
4. Press WRITE, then exit the screen.

5 - FFT Check

Reason: Check the motor/axis for resonant frequencies before tuning further.

• E-stop: pressed in

• Screen: Ready

   

1. Press Enable, then press Start.
2. Press Write In when complete.

6 - Auto-Tune on the Drive (F20-ADV)

Reason: Run the drive's own auto-tune routine. MASSO Motor Studio is no longer needed at this point — the USB cable can be disconnected.

• E-stop: pressed in
• Screen: Ready

1. On the drive's front panel, press the M button until F shows on the left.
2. Press up/down until F20-ADV shows.
3. Press ENT.
4. Press and hold ENT — you'll hear the drive buzz.
5. Press the up arrow to start the tuning.
6. When tuning finishes, press and hold ENT to confirm.