ViewLoader

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VLocity
By Bill Mills - Photos by Dawn Mills - April 2006

Page 1  -  Page 2

In the 1990s ViewLoader dominated the world of tournament paintball.  Their electronic agitating loaders were the de-facto standard.  The VL2000, and its successor the Revolution utilized an internal motor and stirring paddles to prevent the problem that plagued most hoppers at the time – jams.  When light from an infrared LED in the feedneck struck an IR detector on the opposite side, the Revolution recognized that its feedneck was empty, and kicked into action, spinning its un-jamming paddles, and stirring up the paintballs inside the hopper, so that more will fall by gravity into the paintgun.

The next generation of loader from ViewLoader was the eVLution, and the later, more refined eVLution II.  The eVLution took another step forward technologically, in that it allowed the paintballs to fall into a ring shaped raceway in its bottom, where they were driven by a motorized impeller to the feedneck.  This move forward in design jumped from simply unjamming paint to sorting it into a line for the feedneck.  Like the Revy before it, the eVLution loaders used an infrared break-bean detector in the feedneck with a circuit designed to activate the motor when a gap was detected in the stack of paintballs waiting in the feedneck. 

ViewLoader started putting its newest loader, the VLocity into the field first with its high-profile sponsored teams during the last tournaments of the 2005 season.  These pre-production field trials allowed the loader to go through professional level tournament play while final adjustments were made before full production began near the end of the year.

The VLocity represents ViewLoader’s next step forward in loader technology, providing for true force-feeding where pressure from the loader drives paintballs into the paintgun’s breech without having to wait for an empty space to appear in the feedneck.  The software driving the Vlocity even allows the user to adjust the amount of force applied to the feed stack, from low pressure for dealing gently with brittle paint to high pressure for maximum speed.

The VLocity design forgoes the eVLution’s egg shape for a new design that is more slender in the front, to increase the chance of a deflected shot, and places the batteries near the front for better balance – the first ViewLoader product to do so.  Six steel Phillips head screws hold the VLocity’s two halves together, and lock the internal components in place.  The battery compartment locks into place with a single Phillips head screw. 

Although this means that a screwdriver is needed to install fresh batteries, it also keeps the battery lid secure, rather than depending on flexible plastic latches that can wear and fail.  The body of the VLocity is built from high-impact polycarbonate.

Inside the battery compartment is a clip for a pair of 9-volt batteries.  Frayed wires and broken solder connections were among the most common problems facing the original VL 2000 electronic loaders.  These were eliminated with the use of spring style clips in the Revolution and eVLution loaders.  

The VLocity’s design, with the batteries stored forward of the circuit board meant that spring clips directly on the board were impractical.  To combat the possibility of a frayed wire, the VLocity’s battery clip uses crimped, rather than soldered connections, and the wires pass through a strain-relief hole, which prevents them from being bent back against their connections.  At their other end, the power wires plug into a socket on the circuit board, and thus are easily replaced if damaged.  Soldering skills are not required.

The feedneck of the VLocity has some additional significant design features.  Most noticeable that it is molded as a single piece, rather than two separate parts like the feednecks of most hoppers. 

This avoids potential alignment problems, or shifting of the two pieces under the pressure of a tight fitting clamping feedneck.  With walls 0.15 inches thick, the feedneck is quite sturdy, and fit into a variety of paintguns during testing without modification.  The one exception to a perfect fit was in a Nerve’s clamping feedneck, in which a layer of tape was needed to snug it into place. 

Because the VLocity does not depend on a gap between the paintballs for activation like the earlier eVLution models did, it is able to operate with a noticeably shorter feedneck.  Including its 1-1/2 inch feedneck, the VLocity stands seven inches tall and seven and a half inches long. 

A less obvious feature of the VLocity’s feedneck consists of a pair of raised ridges on its interior.  The rails allow the paint in the feedneck to be kept in proper alignment for the loader’s IR detectors, and to be fed perfectly inline, while allowing the feedneck to be slightly larger in diameter.  The larger diameter of the feedneck means there is room for airflow around the paintballs, reducing the effects of blowback from the paintgun, and reducing the piston effect of air below a paintball slowing how fast it can be fed.

The 5-3/8 inch width of the VLocity in the rear is defined by its catch cup, which ViewLoader calls a raceway.  This part is the round cup into which paintballs fall before the impeller drives them to the feedneck.  The VLocity’s raceway is larger than those of other loaders presently on the market, and this offers an advantage.  The larger a loader’s catch cup, the more spaces ia available into which paintballs may fall.  More spaces in the catch cup mean an increased probability of a paintball making its way from the randomly moving mass of paintballs in the loader and literally falling in line toward the feedneck.

The spring loaded flip top at the rear of the VLocity pivots on a steel pin, and is of a normal width to allow feeding from a standard pod.  Like other ViewLoader hoppers it is spring loaded to flip to the full open position once unlatched.   The real innovations of the VLocity, however are on the inside.

Centered in its raceway is the VLocity’s 3-piece impeller.  The bottom piece of the impeller is a disk, which connects to the loader’s gear train.  Riding atop that piece is the impeller itself.  Three arms extend from the center into the raceway to drive paintballs out of the loader.  A ring of bumps also serve to bounce and jostle paintballs, stirring them into the raceway.  Atop the impeller assembly is a cone, which uses gravity to direct paintballs from the impeller’s center out into the raceway. 

The key to the impeller assembly’s function lies in the fact that the impeller pivots independently from the base, with a spring linking the two parts.  The spring can hold pressure on the ball stack even when the motor is not spinning.  Constant pressure means that a paintball will be driven into the breech the moment the paintgun’s bolt is open far enough, even before the motor is activated.

The motor drive assembly that powers the VLocity impeller is quite compact, consisting of a motor that fits into a gear box which develops the proper rate of spin and torque, while turning the axis of rotation 90 degrees.  The motor drive’s central steel axle extends downward to an opening in the bottom of the VLocity.  The end of this axle is ribbed with tiny splines which will allow a gear or knob to be friction fit.  This arrangement means that accessories similar in function to the HALO’s Rip Drive knob could potentially be added to the VLocity.

The motor drive plugs into the VLocity’s circuit board.  Because it is not wired permanently to the board, swapping out a motor drive assembly is an easier task during maintenance or repair.  The circuit board itself is a source of more innovations. 

Like all high-end electronic loaders, the VLocity is controlled by an embedded microprocessor, or microcontroller.  The software that drives the loader is recorded in this chip.  Getting high-end performance is more than just turning a motor on and off, and as loaders has advanced, so has the software which drives them.

The VLocity’s internal software features eight user selectable performance levels, which could best be described as aggressiveness levels.  A steel toggle switch on the back of the loader turns it on and off.  To the right of the switch is a status LED, and to the left is a tension control push button.  While the loader is on, and operating normally, the LED lights green.  Holding down the tension control button causes the LED to blink orange.  The number of times it blinks indicates the tension mode level, from 1 to 8.

When selecting the tension mode the LED will blink for one rate, then move on to the next.  Releasing the button will select the mode number last blinked, and the LED will blink the number of the mode again, to confirm which change was just made.  The VLocity records its mode setting, so that it does not have to be reset the next time it is turned on.

As the tension level setting is increased, the VLocity puts greater amounts of tension on the spring inside the impeller assembly by pulsing greater current levels to the motor when needed.  At its highest level, the motor can be heard, putting constant pressure on the paintballs leading straight into the paintgun’s breech.

Testing of loaders on different paintguns (see Loader Lineup 2) has shown that there is more to maximum loading speeds than just the loader and its software.  The design of the paintgun the loader is interacting with will also come into play.  While ViewLoader has addressed this to a degree with the adjustable tension, they have also set things in place to allow for further customization.

The VLocity’s microcontroller is a socketed DIP device, which means that it can easily be replaced.  Microcontrollers pre-programmed for optimal performance with a particular brand of paintgun can be built and marketed as a simple plug-in performance upgrade by third party manufacturers.  Such performance upgrades would not bear the cost of an entire circuit board as is the case with most other loaders.

Also not to be overlooked are the infrared sensor beams which straddle the feedneck.  The VLocity’s dual-beam system provides its microprocessor with more data about feed conditions than the single beam used in VL’s earlier models. 

The center beam will always be broken, as long as there are paintballs in the feedneck – even when the loader is feeding.  The second beam, closer to the edge, will break only with the widest diameter of a paintball passes it, allowing the software detect not just a gap in the stack of paintballs, but also the rate at which an uninterrupted stack of paintballs is moving.  This is critical not only for proper application of force to the motor, but also detecting jams.

Anti-jamming is another feature built into the VLocity software.  If the microprocessor’s feedback sensors determine that the feedneck is empty, and the motor is drawing more amperage because it is facing resistance, it kicks the motor into reverse momentarily about the distance of half a paintball’s diameter, to unjam a paintball that might be caught between one of the impeller’s arms and the mouth of the feedneck.

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