On Mon, 19 Jun 2000 09:20:54 EDT CapAAVSO@....... writes: > In a message dated 6/19/00 5:50:02 AM Eastern Daylight Time, > danieo@............ writes: > > Amateur constructors need not be daunted at the prospect of > having to buy expensive penmotors.
An example of a very powerful servo-type penmotor is on Larry's site. I built this for a strip type recorder using cheap cash register rolls. With a longer arm it could be used to walk across a drum. It has been in operation well over a year with no failures, and we have gotten excellent recording results with no problems using ordinary "sharpie" type pens. The unit has enough torque to probably run a Dremel engraver on aluminum strip material (if you wanted "fade proof" recordings)... Was there some TV show called "Have drum, will travel"? __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>