Scan thru

**absolom7691** · 09-30-2013, 23:02

Originally Posted by polishedball

i knows it busy, was just playing around to excess.

also vids are kinda rough, not sure if youtube or what will post better later on.

Top notch, John! Lovin the Metallica! Seeing your awesome rig in action is getting me excited to start working on mine!

Originally Posted by dave

Using this little sucker.. A small 2 channel DMX - servo driver.. I have it configured as only 2 position ( in and out ) but the 2 pots allow me to set the down position for each servo.. Pretty useful to get Linear gratings doing a horizontal line

Attachment 40228

Dave, how would this work with a continuous rotation servo? I am interested in being able to control the rotation of a lenticular optic as far as switching between static, rotation clockwise and anticlockwise.

**dave** · 10-01-2013, 03:45

Originally Posted by absolom7691

Dave, how would this work with a continuous rotation servo? I am interested in being able to control the rotation of a lenticular optic as far as switching between static, rotation clockwise and anticlockwise.

Haha, I dont think it would work TBH. You could do what you need with one of my analogue boards and one of my gm20 drivers

**polishedball** · 10-01-2013, 04:20

How fast are these, I need to add 3 more positions, but have always thought i'd be able to see servos sliding into the beam. Where the solenoids snap in so fast you don;t see it.

John

Originally Posted by dave

Here is my take on the scan thru thing using RC servos

Attachment 40227

Using this little sucker.. A small 2 channel DMX - servo driver.. I have it configured as only 2 position ( in and out ) but the 2 pots allow me to set the down position for each servo.. Pretty useful to get Linear gratings doing a horizontal line

Attachment 40228

**dave** · 10-01-2013, 05:37

Hey John,

They are pretty quick, but not so fast as to not see any artefacts.. Ill send you a board to mess around with if you like?

Originally Posted by polishedball

How fast are these, I need to add 3 more positions, but have always thought i'd be able to see servos sliding into the beam. Where the solenoids snap in so fast you don;t see it.

John

**polishedball** · 10-01-2013, 06:26

Originally Posted by dave

Hey John,

They are pretty quick, but not so fast as to not see any artefacts.. Ill send you a board to mess around with if you like?

Thanks ill PM ya in the next days. Gonna have a parts order again.

**JasonB** · 10-01-2013, 08:15

Nice looking effects, sure does make the show a lot more interesting by addding the scan thru. Also thats a cool sequence of frames , I really like the precision timing to percussion at 3:25 on your metallica show. Great stuff, thanks for posting.