What causes the Futura CE100 to beep constantly?

SOURCE: My Futura CE-150 beeps and stops sewing after only a few stitches

Look for the buttonhole lever, just in front of the presserlever, on the lefthand side of the machine. Pull it down and push it back to the top. Good Luck

SOURCE: why does my ce-200 beep every few stitches?

I was having this problem for two days so I just called Singer and got a solution!  I'm posting it for you because I was on here looking for a solution to the problem and nobody had posted one.
Take the top thread out of the machine - cut it back by the spool and pull it out through the machine the way the thread goes when you are sewing - you don't want to be pulling the thread back through the machine because dusty bits are getting stuck up in that part of the machine with the frosted plastic where you have to make sure the thread is pulled into when threading.  You might not think there is dust in there - I didn't because I had taken that part off and brushed it out but that didn't work.  What you need to do is floss that part of your machine.  Get some dmc floss or some UNWAXED dental floss and pull it into that part of your machine - under the pieces that are under that frosted plastic part on the top of your machine - now floss it back and forth for a good 30 - 45 seconds.  When you are done that pull it out to the left - the way the thread goes when the machine is sewing - remember pulling the thread back the other way will get fuzzies stuck in there.  I rethreaded the machine carefully and made sure that the thread got pulled into that top part properly - the lady on the phone said it may feel differently now that its been cleaned out.  Then it worked again!
I hope this works for you!

SOURCE: singer futura beeping every 8 stitches can you

Make sure your thread goes under the plate of the carrousel. If not the machine think is not threaded and it beeps. Thread the machine with your left hand and Pull the thread with your other hand to make sure it "clicks" to every part of the machine.

Another important detail is to add thread nets to your spool. After some used the tension of the machine is affected and the nets help the slippery thread to be pulled by the machine correctly and avoiding the beeping.

SOURCE: My Singer Embroidery machine works wonderfully on

HI,
Did you make sure that you raised the feed dogs? There is a sliding button on the front that you have to move sideways to let the feedogs come up. If not the fabric is not being move right and that may be the reason of the wrong stitching.
Also, are you oiling your machine appropriate?

SOURCE: Machine will stitch for a

PLEASE check the simple threading of the machine when threading on top thru the clear plastic cover you should hear 2 (two) clicks when you guide thru it. Had this problem quite a while until a tech made me aware of this.