Last month’s production of Marjorie Prime at Center Theatre Group featured some pretty heavy lifting under the set. We were happy to provide the automation for that heavy lifting, and coordinate with our good friends at Stage Machines for the hydraulic muscle. Center Theatre Group is no stranger to automation, and have used their Fisher (FTSI) gear regularly. However, the automation in Marjorie Prime would require hydraulics, and that could not be controlled easily with the FTSI gear they own.
Mimi Lien’s set design (a stark, “soul-erasing beige”, assisted living facility 50 years in the future) requested the automation of one large stage platform (traveling 42″), a sinking refrigerator, and a small sliding set of steps. No problem. In the video you’ll see our initial scissor lift mock up, testing at load-in, and the full set in motion. Read on below the video for further description of the process.
The gear line up:
Four scissor lifts
One 10 hp hydraulic pump (that’s right just one)
One custom 10hp drive
One flow divider
One small hydraulic scissor lift
One small pump
One Stagehand Mini
Two Stagehand AC Motor Controllers
One PC laptop with Spikemark installed
Celesco and Unimeasure Encoders
Cables as necessary
After a site survey in sunny Los Angeles at the Mark Taper Forum, the next step was to tackle the largest component, the vertical automation of the stage platform. Working with Stage Machines, we decided to do a mock up of the design for a piston flow divider consisting of one master cylinder and four slave cylinders that could be controlled by a single Stagehand Mini.
With one piston doing the work, and the other pistons mechanically joined together, the exact amount of oil would go into each lift’s cylinder to produce completely level lifting and lowering even though the weight of the platform would be unevenly distributed. Satisfied with the results, production began on those components.
For the sinking refrigerator, a small hydraulic scissor lift powered by a Stagehand AC was placed beneath the unit. And the sliding steps were rigged to an existing FTSI winch controlled with a Stagehand AC and some help from a custom set of adapter cables.
All the gear was shipped to and installed by Center Theatre without problems. Nice job, everyone!
Special thanks to Assistant Production Manager Kate Coltun, Stage Carpenter Emmet Kaiser, and Assistant Technical Director Chad Smith. We’re looking forward to working with you again!