The E-Roll Player has been in production for over six years.
As much as I would like to continue production, it is not economically
feasible to continue. I will continue to provide support for
all systems sold. I have an inventory of spare parts and will
retain all pages containing information on the latest as well
as the older systems. This page contains links to those pages.
If you need any documentation, configuration utilities, firmware
updates or any other information or tools and can not find them
here, please e-mail me.
Bob Hunt is selling a system called "The Virtual Roll". I
highly recommend it as an alternative to the E-roll Player.
Click here for the
Virtual Roll Site(new)
Click
here for The Virtual Roll Page on this site .
Check the MIDI
Valve page for information on the previous model. MIDI
Valve Page 2 for pictures and testimonials.
Click
here for a page with information about the new system (also discontinued).
New
E-Roll Player Installation Manual
Click here Pictures and letters
from customers.
Please click here for a PDF brochure
describing the previous system, including pricing, The new system
will be similarly priced..
Click here for the Installation Manual
(Original System) which includes photos of installed systems.
Below, you will find additional information describing the features
of the valve block which is the heart of this system.
The valve
block measures 1.25" x 1.4" x 5" ( 32 mm. x 36mm.
x 127mm) without connection nipples.
Sixteen valves
are contained in each block allowing for location close to existing
signal tubes. The valve orifice is .90" and the valve travel
is .040" although these dimensions may be modified for special
situations. Air flow at 4 inches water column is significantly
greater than the signal tube / tracker bar configuration in both
the Duo-Art and the Ampico A. Therefore the units can be installed
at an even greater distance from the stack than the original tracker
bar and still have adequate valve action. However, this is not
likely to be necessary due to the modular design which allows
for distributed valve placement. In addition, the rapid response
of the low mass valve will enhance valve action further. Most
installations will be done with wye fittings (provided) to connect
to the instrument's tubing. Optionally, the valve blocks may be
cross drilled (please ask for this to be done) if they are to
be installed directly in tubing runs. This will allow for no reduction
in air flow through the original tubing.
The valve
blocks use pick and hold control. This allows for operation against
high vacuum pressure without overheating in extended operation.
The pick and hold controller provides an initial voltage for valve
opening and a lower voltage to keep the valve open. These voltages
may be adjusted for special needs. The pick period is field selectable,
however, the default value will suffice for most installations.
Once a valve is switched on, it can remain on indefinitely without
overheating of the magnet or the associated electronics. For this
reason the valves can be installed behind accoustical insulation
to produce virtually quiet operation.
The valves
will open against a vacuum in excess of 90 inches of water and
repeat at a rate of over 20 hertz. This is well in excess of piano
action response times. Higher repetition rates are possible by
custom configuration. Repetition is also excellent at 4 inches
of vacuum and less as the valves are self closing and do not depend
on vacuum for their operation.
If you would
like to be notified of further developments please send an e-mail
to me by using the link on the navigation bar and I will put you
on a list for future contact.
Click here Pictures and letters
from customers.
Please click here for a PDF brochure
describing the complete system, including pricing.
