Profession - Senior
Mechanical Engineer - Mark Case, P.E.
Design anything that moves... Take advantage of best (maybe the latest) technology. Listen
to the people that know... the operator and the maintenance person.
Experience & Education
|Project Engineer - Genie Industries, a division of Terex (Aerial Work
Designed hydraulic and electric drive systems, computer controlled electro-hydraulic systems and vehicle
|Design and Project Engineer - Goldendale Aluminum 12 years.|
Focus in project management,
machine design (including numerous electro-hydraulic, PLC controlled
troubleshooting on large, complex machinery.
|Designer/Liaison Engineer Freightliner Corporation|
Performed cab structural design for
military truck vehicle project(2,600 units). Followed truck through production line made
modifications to design while in manufacture, communicated design changes necessary for
capability to designers for all aspects of vehicle. Corrected
design of cab and related components.
|Bachelor of Science in Mechanical Engineering (BSME) - Washington State University, 1988|
|Registered Professional Engineer (P.E.) - State of
|Private Pilots license |
Mechanical Design Have
designed numerous machines and systems ranging from material handling to
piping systems, to emissions control systems, hydraulic presses, and numerous other
purpose built machines for performing various tasks in the hot, dirty, rough and tumble
world of an aluminum smelter.
Solid Modeling AutoCAD
Mechanical Desktop, Autodesk Inventor and Solidworks. I have used CAD in all phases of
mechanical and electrical design for 15 years. Have been using solid modeling for
ten years. Currently 90% of all of my new designs are solid models.
PLC Programming Have applied
PLCs of numerous types of mobile equipment (a very demanding environment for PLCs).
Proficient in Allen Bradley SLC 500 and PLC 5(with RsLogix). Applied OPTO22 hardware
for control of environmental systems- utilized cascaded PID loops. Mobile PLCs were
Automation Direct(Koyo/PLCDirect) with PID loops and wireless Ethernet connection for
remote control of stationary equipment and for display of information from central company
database to vehicle mounted touchscreen.
Designed and specified numerous industrial and mobile hydraulic systems. Well versed
in proportional hydraulic valve technology and integration with electric remote
proportional joysticks and PLC controllers.
Educator Developed a
curriculum for and taught beginning through advanced courses in Computer Aided Design with
AutoCAD at Yakima Valley Community College and Columbia Gorge Community College.
Support of Employee Involvement
- Lansberry Tractor Control System -
- Designed and oversaw installation of and
programmed “Fly by Wire” PLC control system for revolutionary single
track tractor/crawler in thirteen(13) days. Previously a team of
comprised of the controller hardware vendor and their recommended software
integrators were unable to provide functional control system during
fifteen(15) month design, installation, and troubleshooting period.
PLC control solution development costs were 1/30th of the previous attempt. http://lansberrytractor.com
Click to Enlarge
for more details
- Precision Ore Feeder
- Feed Screw is controlled by a PLC monitoring an encoder
built into the hydraulic drive motor to achieve precise doses. The
spreader attachment forms a dam of dispensed material, against which,
the screw pushes- - this results in a dustless operation.
Ore Deck Trimmer
- Designed a machine to automatically trim(sweep) Soderburg Aluminum
Reduction Cells. The operator performs this hot, dirty work from the cab
of a hydrostatic, air conditioned Linde Baker vehicle. The unit is equipped with proportional electric
hydraulic PID feedback control system which monitors brush motor torque and automatically
adjusts the height of the brush head to maintain consistent brushing action and to improve
brush life. See a Drawing
and Brochure (pdf)
DECKTRIMMER ATTACHMENT(in relation to production cell)
- Alumina Fluoride Delivery Vehicle
- Utilized standard Baumann side-loading forklift cab, frame
and powertrain. Designed and mounted bulk material hopper and precision screw
feeding system. Factory hydraulics were removed and replaced with
Danfoss electric proportional hydraulic system. PLC controller
receives dose weight by polling the company production database via wireless
Ethernet connection. A digital rotary encoder monitors screw feeder shaft
position and speed to ensure precise fluoride dose. Stationary
production cells are remotely controlled, also via wireless Ethernet.
Custom Tapping Vehicle
Designing a new self-contained tapping vehicle with on board air
compressor and Diesel engine. Existing units are battery powered and must be tethered to
air hoses. New tapping vehicle will be equipped to draw metal directly into a transfer
crucible, thereby eliminating an existing pour operation. Eliminating "the
pour" cuts gaseous fluoride emission dramatically, eliminates unsafe and floor
damaging, molten metal spills. Not pouring reduces metal reoxidation thereby contributing
to project payback..
Diesel Powered Mobile Crustbreaker - See Brochure
& Envelop DWG.
-or- Click here to view hydraulic
Click to Enlarge
(If video doesn't play, download Windows Media Player from Microsoft.
Current section air crust breakers are tethered to a plant air line
resulting in limited range, and dependence on varying plant air pressure. This inability
to move around the plant requires numerous spares to distributed throughout the cell
production lines. The new unit is mounted to a standard Linde Baker fork truck frame. A
new hydraulic system installed in place of the factory setup which uses
regenerative cylinder extension and accumulator energy storage(during upstroke.)
The stored energy is then employed to afford greater breaking power while
maintaining the fast cycle time of the air powered units. Controls are integrated into a
Spading Machine Overhaul and Hydraulic Upgrade
Removed outdated, unresponsive hydraulic pilot, joystick controlled hydraulic control
system and replaced with modern, proportional electric piloted, load sensing hydraulic
system. The new system is a nine function hydraulic stack with internal load sense
shuttle network. It's proportional flow control spools provide finer control while
eliminating about forty hoses and six discrete valves. The system allows adjustable
load sense pressures for each direction of each hydraulic function. The
flexibility of electric control signals will allow the elimination of one of the three
existing joysticks. Two ergonomic, multifunctional joysticks can perform the same
function with much less operator fatigue.
Install New Hydraulic System and Automate Crucible Cleaning Machine.
Remove leak prone hydraulic system mounted internally to machine frame. Existing system
was controlled via mechanically stroked hydrostatic pump circuit and mechanical
proportional hydraulic valve. The system was replaced with PLC controlled
electro-hydraulic system with hydraulic linear positioner system with MTS linear
transducer, Rexroth proportional control valve, and electrically stroked Denison 85 GPM
closed loop pump. Machine can now run manually via electric proportional joystick control
or under automatic cycle. Under automatic control the PLC controller monitors machine
vibration and hydrostatic pump drive motor current. If either parameter is above threshold
level, the positioner cylinder slows down the cutting head advance rate to preserve the
carbide tipped cutter teeth.
150 Ton Press
This press is not large as presses go, until you consider that it has a 10' deep throat
to allow straightening of 16' X 29' cathode bottom shells and anode side casings
that the previous 100 ton press could not touch. The unit employs a dual pump(hi-lo
speed) circuit which automatically unloads the high volume pump when high pressure
is required. The work pieces are so large that a remote control pendant is used so
that operator is able to see the operation, while operating the controls.