(As a side note, if we
grind a Turkish-type
grind at 100 pm for example, there is an incredibly high exposed surface area, but due to the near impermeable structure of the ground coffee, it cannot be brewed through a brewing device and must be prepared by mixing directly into hot water.)
Since these grinders produce a consistent
grind at a lower temperature than blade grinders, they produce a richer taste.
Regrinding the blade removes the coating from the most important area or the blade concerned with web-to-blade abrasion resistance--the primary
grind face.
"To overcome the tooth tip burr problem," Bodie says, "we developed two new grinding methods--a full tooth form grinding method with axial band stock oscillation during the
grind for coarser teeth, and an alternate tooth, multiple
grind cycle for fine pitch teeth."
Offering precision grinding from extra coarse to extra fine, burr grinders may have as many as 17 different specific
grind settings from which to choose.
To improve productivity, Kovatch recently added a Model PG-30 Reciprocating Power
Grind programmable belt grinder by Grinding & Polishing Machinery Corp., Indianapolis.
That would require improved size control and greater stock removal during the centerless
grind.
To achieve this, an operation must rough
grind with a coarse grit wheel and finish with a very fine grit wheel.
This total grinder automation technology includes not only the monitoring and measuring of every aspect of a coffee
grind, including density and temperature, but also the adjusting of the grinder to automatically maintain the desired specification.
Probably the oddest material to be run through RPEI's grinders was the time one was used to
grind up dead livestock for use in composting.
"You can
grind right into the coloring machine if they have a coloring machine that can keep up with the grinder output.
Always
grind on the proper surfaces of the wheel; do not
grind on the wheel's side.
The wet fine
grind process is unique in that very intense and rigorous cutting paths are required for the particle to travel while being reduced.
Coffee
Grind Varies from Time to Time: "Sometimes I get a good
grind and a little while later it has changed!" There are several areas of possibilities given this scenario.
