motion underrun

[smcelhaney322]

I have a constant problem with motion underrun (error 7).  I seen comments in posting that it may be due to a slow computer and to increase the queue in the PDX configuration.   My computer is not slow (dell inspriron  5000 series) and I have increased the queue to near max.  In runs for 8 minutes before hitting the underrun, then it may run 2-6 minutes before having that error again.

Any suggestions?  My pdmx cable is connected straight to my computer.   Does it matter if it is a usb 2.0 or 3.0 port?

[Steve Stallings]

The SmartBOB family of products are USB 2.0 and backward compatible with USB 1.1.

If connected to a USB 3.0 port they will run in USB 2.0 mode.

Even though your computer is fast, it is possible that your G code contains segments
so short that there is not sufficient time to transmit them relative to how long the
movement should take. Look to see if you have G code moves that are tiny, such
as less than a couple of thousandths of an inch.