Magnum Venus Plastech MicroPro - Manual (Page 21)

MicroPro Operations Manual
Rev. 09/2012 Page | 21
Setting Pump Ratio:
The resin pump (part A) (Poly) normally is fixed at the longest pump stroke length and is
not used for adjusting the ratio changes.
The hardener pump (part B) (ISO) is used to set the proper ratio by loosening the cap
screw (F-CS-05C-08 Socket cap screw) and sliding the Upper & Lower Slide Clevis (top
and bottom of the metering pump) in the slotted track to the desired setting, the
retighten cap screw. The indicator stickers on the top and bottom of the slotted track
are used for a reference indicator when setting ratios.
During the priming of the fluid sections if both fluids read pressure, proceed with setting
ratios. If one of the fluid sections shows no pressure because of a very low viscosity
material, a restriction is needed to create fluid pressure. By adding a smaller diameter
hose onto the ratio block to restrict the flow is normally all that is needed to increase the
fluid pressure.
To set the ratio, an accurate scale or volumetric beakers are needed.
1. Pull the trigger on the gun, allowing for the A&B materials to begin to flow out of
the ratio block. Slide two pre-weighed containers under the resin streams. Allow
no less then 10 pump reversals before removing the containers. Release the
trigger on the gun. Subtract container weights to find ratio. Some material
manufactures may only give a volumetric ratio rather then weight. If this is the
case and setting the ratio by weight measurement is preferred then the Specific
Gravity of each material is needed to convert weight to volume in cc’s.
Example:
The Poly resin (A) weight is 500 grams and has a Specific gravity of 1.09 which
requires dividing the sample weight by Specific gravity (500/1.09=458.71 cc’s).
Repeat using the Specific gravity and dividing by ISO hardener (B) to weight to
convert to cc’s.
2. To adjust the ratio, loosen the cap screw to adjust the pump stroke length on the
ISO hardener (B) fluid section (shorter – lower slave arm number).
3. Tighten cap screw before checking ratio again. Make notes of each setting that
the ratios were taken from on the indicator sticker until desired ratio is set.
Once the material ratio has been set flush the ratio block by pushing in the flush valves
and selecting between solvent/air purge with 3-way ball valve.