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===== Bad USB cable =====

When we first started up the software, it didnt display the huge red "ON LINE" button and said it couldn't find the "KPS card" due to a bad USB extension cable. Don't forget also to have the pick and place on before the computer so that it auto-starts correctly

===== Misaligned homing dots =====

We also had a problem where the machine would not 'HOME' properly. If the homing dots aren't where thinks they should be the machine freaks out and quits. Turns out that our homing-dot brackets were not tightened before shipment (hey it happens!)

{{:mdcpickandplace:homingright.jpg|}}

As a result, when moving the machine, the bracket moved. We shifted the bracket back so the homing dot was where the machine looked for it and it started homing again. *whew*

===== Misaligned nozzles =====

In the nozzle programming/teaching menu, we had a new problem, which was that the nozzles were not centered

{{:mdcpickandplace:nozzlepos.jpg|}}

It turns out this was because when we re-set the homing dots (above) they were off slightly and the machine had a bad skew calculation. The homing dots are actually there to align the two Y motors (since they can be out of sync). As a result we needed to reset the homing dots using {{:mdcpickandplace:mdc_luna_mark_adjustment.pdf|special instructions}} by gently aligning the Y motors, then retraining it on the new dots. Once we did this the nozzles came back into alignment.
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