Spindle Kit Setup


If you’ve installed the Sienci Labs Spindle Kit, plug in the power cord from the VFD unit into a wall outlet or extension cord now. If you’re using an extension cord, ensure that it is rated for 1500W of power.

Without the VFD unit plugged in and powered on, the controller won’t be able to communicate with the VFD and will present an ‘Alarm 14’ error.

Connecting spindle to power

With your computer connected to your machine, and no alarms active, we’ll need to enable one setting to allow for communication between your controller and the spindle. Click on ‘Firmware’ in the top right corner of gSender to open the firmware window. Scroll down to find the setting called ‘$395 Default Spindle’, and select the ‘H100’ option then click ‘Apply new settings’.

Applying spindle firmware settings

Power cycle the controller to have this setting take effect by flipping the ON-OFF switch at the rear of the controller, remembering that the E-stop button also needs to be pressed then released after a power cycle to fully power on the machine.

Switching the OFF-ON for power cycling

In gSender, click the small gear icon to open the settings menu, then select the ‘Spindle/Laser’ tab. Here, toggle the ‘Spindle/Laser’ option to enable this menu in gSender.

Toggling the spindle on

Set the spindle’s ‘Min’ and ‘Max’ speeds as 7500 and 24,000 RPM, respectively.

Correct AltMill spindle speed settings

Exit the settings menu, and you should now see a ‘Spindle/Laser’ tab on the bottom right corner of gSender. Here, you can try setting a desired RPM speed, then clicking ‘Start’ to have the spindle start spinning up to the set speed. Ensure there are no obstacles in the way of the spindle or any loose parts nearby before turning this on. In the event of any emergency, press the physical E-stop button to immediately stop the spindle.

You’ll also want to make sure the spindle is spinning the correct direction by watching as the spindle slows down to a stop once done.

Spindle rotation control 

Now that you’ve finished these last checks on your AltMill, you’re almost ready to start making! If you have already set up your wasteboard, feel free to continue into the ‘Handbook’ section to familiarize yourself with the various features and functionalities of the machine, as well as troubleshooting and maintenance methods. Otherwise, to the wasteboard we go!