scanner stops and starts continuously

I'm using a Canon Imageclass MF 4320-4350 printer.

When scanning, either from Platen Glass or Feeder, the document going through the feeder or the scanner passing under the document on the glass, starts and stops continuously. It scans a samll part then pauses, scans a small part and pauses.

It will pause 6-8 times the length of the document and the pauses last varying seconds. This, of course, results in very long scan times. Ocassionally the scan pauses and will not start which results in the loss of the entire scan.

I'm using a Dell Inspiron running Win10, 64 bit, with all updates. I'm using Toolbox 4.9 as my interface.

I also use the printer to print and copy and those functions appear to be working correctly.

Help!