A word on USB-hubs

A small note on usb-hubs and using older computers or pad´s to run the machines.
All computers has a usb-host controller, this one controls the data sent out and powers the ports.
On older computers or smaller laptops there is one host-controller for all ports. On newer machines there is often one controller per port, or per set of ports.
 
What may happen is your laser starts to freeze up, it hesitates for a half second and then runs again.

This happens because of the host controller of the ports sending data to all ports + the hubs. Error correction gets too high and the buffer can´t handle it.

Best connection scenario
– Always connect the machine directly to a usb-port on your computer, not a USB-hub.
– You can use a hub in the machine to add machine and dongle to, connect the hub directly to a usb-port on the computer.

USB-hub mounted inside the laser with the dongle.

If you get stutter like this, some things to test
– Get a powered hub
– Remove other connected perhipals, like mouse or printers.
– Try swapping the usb port used on the computer

If you still get stutter or hesitation on your machine it´s due to the limited hardware of the original controller, consider a upgrade of the controller.

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HP Persson

Digging up the strange ideas and convert them into useful tools and addons for the lasers.
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