Plotter/cutter machines and MTC software...

[Dorsetmike]

After 6 years my KNK Zing has developed a fault in the USB connection, currently awaiting news of the repair.  I have never had a problem cutting any material so far, the MTC software is easy to use and versatile, I would seriously consider buying another if a repair is not posible.

[Dorsetmike]

Further to the above, failed to get sorted, sounds like it needs a new PCB, or the one currently fitted to go back to makers, which is in USA; so bought another on Ebay, slightly later model, but about half the price of a new one.

[themadhippy]

After 6 years my KNK Zing has developed a fault in the USB connection

if its just the connector i'd be tempted to cut the connector of the cable and solder it direct to the pcb

[Dorsetmike]

Checked with more than one cable, also checked on laptop as well as PC, one pin of connector on PCB was loose and resoldered, still the same, so diagnosis points to the USB interface chip which being a surface mount item is something I am not equiped to deal with even if I could decipher the chip type.

[Dorsetmike]

Think I may have sussed it, the USB socket on the back of the machine is upside down, cable plugs in either way but looking at the socket the slight curve is at the bottom (it's one of those almost square ones) so plugging in wrong way will have put the USB power to the wrong pin on the chip which probably won't have done it any good.

When the cable is connected correctly the machine does show in control panel as a USB UART FTR232R, but not working.

[Delboy]

Hi Mike,
Seems sad that for such a costly machine you are allowed to plug the USB in the wrong way and effective may have damaged the unit.
Bad design flaw i.m.o.

[Dorsetmike]

Machinne from Ebay arrived, took an age to unpack, loadsa tape. Enough spare blades to see me out. Anybody want my old one, (offers?) only needs a USB chip (FT232RL) buying and fitting!