Need Assistance Using Intervalometer Please

Trying to get prepared to shoot Perseids later this week.
Will be shooting with Canon EOS R6. Sigma 14-24 wide angle lens and I also have a Vello ShutterBoss ii.
Now even though I believe I can set my photoshoot up using the camera’s Bulb Mode I think I’m still more comfortable using the Vello. Trying to do some practice shots but it’s not working 100%. Here are my settings:
Camera is in Bulb Mode
Vello is connected. Vello settings are:
Self: 10 seconds
Long: 10 seconds
Interval: 3 seconds
Number: 10

What is not working is the “Interval”. It’s not waiting the 3 seconds but rather shooting 1 picture after the other without an interval. Aside from that, everything else seems to be work8ng as should.

Any ideas?

Bogino wrote in post #19269053
Trying to get prepared to shoot Perseids later this week.
Will be shooting with Canon EOS R6. Sigma 14-24 wide angle lens and I also have a Vello ShutterBoss ii.
Now even though I believe I can set my photoshoot up using the camera’s Bulb Mode I think I’m still more comfortable using the Vello. Trying to do some practice shots but it’s not working 100%. Here are my settings:
Camera is in Bulb Mode
Vello is connected. Vello settings are:
Self: 10 seconds
Long: 10 seconds
Interval: 3 seconds
Number: 10

What is not working is the “Interval”. It’s not waiting the 3 seconds but rather shooting 1 picture after the other without an interval. Aside from that, everything else seems to be work8ng as should.

Any ideas?

Just guessing here, but if the exposure is 10 seconds, should the Interval be "10 sec for the exp" + "the desired interval" + "some time allowed for writing to the card"?

So, if you wanted the time between frames to be say 5 secs, then that would give 10 + 5 + say 2 for the write time?

Dennis