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The most common 1910.147 finding on a robotics floor is a procedure that names a robot family but not the cell. We build the cell-specific procedure that closes that gap, names every energy source, and gives your authorized employees something they can actually follow.
What 1910.147(c)(4) Actually Requires
OSHA's standard is not "you have a procedure." The standard is that the procedure documents the specific equipment, the specific energy sources, the specific isolation devices, and the specific sequence required to make the equipment safe. A procedure that references "Fanuc R-2000" without naming Cell M-04 in your specific facility fails that test.
Robot cells make this harder than standard machinery because the energy picture is rarely simple. Electrical mains feed the controller. Pneumatic lines feed end-of-arm tooling. Hydraulic systems power positioners. Stored kinetic energy lives in counterbalanced axes. Gravity creates loads on parts and tooling. Any of those, missed in the procedure, is a citation.
A printable, post-able, auditable LOTO procedure for each robot cell on your floor. Written in plain language. Built around the actual cell, not a template.
How It Works
We visit your floor and walk every cell with the maintenance lead. Energy sources, isolation points, and tooling configurations get documented as they actually exist, not as the original integrator drew them.
Each cell gets its own procedure document. Written in your facility's voice, not generic templated language. Drafts come back to you for review before finalization.
The team that locks out the cell gets trained on the procedure they will actually use. Documented under 1910.147(c)(7) so it stands up to audit.
Final procedures get posted at the cell. Master copies live in LockStep for centralized access, version control, and the annual review under (c)(6).
FAQ
Yes for the vast majority of cells. 1910.147(c)(4) requires documented, machine-specific energy control procedures for any equipment with hazardous energy. A robot cell with a single energy source can use the limited exception in (c)(4)(i), but multi-source cells (which is almost all of them) require a written procedure. Generic procedures naming a robot family rather than the specific cell fail this requirement.
Cell ID, scope of equipment covered, every energy source feeding the cell, the exact isolation point and lockout device for each, the verification step before work begins, the stored energy release sequence, the restart sequence, and the authorized employee training reference under (c)(7). The procedure must be specific enough that an employee unfamiliar with the cell could lock it out safely by following the document.
Robot cells almost always involve multiple energy types (electrical mains, pneumatic, hydraulic, stored kinetic from gravity-loaded axes), interlock gated entry that requires its own access control protocol, end-of-arm tooling that changes regularly, and shared infrastructure across multiple cells. A standard single-source machine procedure does not handle any of those complications.
For a facility with five to fifteen robot cells, expect a half-day to full-day on-site walkthrough, two to three weeks of drafting and review, and a final delivery on a four-to-six-week total timeline. Larger multi-cell, multi-line facilities scale from there. We can move faster if there is an audit on the calendar.
Free walkthrough first. We will tell you what you have, what you need, and what it would cost. No commitment.
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