The Nolatron TB-3 machine start bar is a complete OSHA compliant ergonomic two hand starting system. It increases productivity while operator fatigue and stress are decreased. It includes guarded hand sensors and an anti-defeat (“anti-tie-down”) control with top panel indicator lights in a durable steel enclosure utilizing Easton Lean Tools, Op Guard, a steel and cast aluminum height adjustable arm.
It is offered with mechanical push buttons, optical hand switches, zero force hand switches and in 24V or 120V versions with M12 quick disconnect out of the bottom for input and output.
Different mounting options include, under counter, floor, thru-surface or wall mount. Under counter mounting shown below
TB-3 with mechanical push buttons
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The Nolatron 4480 is now available mounted in a junction box. If your application needs to have cables and wiring enclosed inside of a junction box without any exposed screw terminals, take a look at the 4480JB. The 4480JB is the 4480 mounted inside of a junction box. The box has a removable screw mounted access cover.
Nolatron ships the 4480JB without any conduit holes. If you need us to pre-punch the holes, let us know and we can add holes per your drawing.
One benefit of this new package is that the hand switch and output lights are visible through the enclosure cover for the operator to see.
4480JB External View
4480JB Internal View
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The Nolatron TB-2SR can be programmed for multiple functions. Huston Industrial integrated the TB-2SR two-hand control run bar to a Schmidt press. Take a look at this video and contact them for a quote on the full turnkey package for this programmable two-hand control run bar using force guided relays for control reliability and associated pneumatic components.
This information is provided for reference purposes only. It is the user’s responsibility to determine suitability for a specific application. Nolatron LLC is not responsible for any damage and/or injury as a result of using the information provided.
These are excerpts from the OSHA guidelines that require “control reliable” controls for two-hand start systems.
According to OSHA guidelines, Programmable controllers which are used in two-hand start systems shall meet the definition of “control reliability”. This definition states that the controllers shall be constructed so that a failure within the system does not prevent the normal stopping action from being applied to the press when required, but does prevent initiation of a successive stroke until the failure is corrected. The failure shall be detected by a simple test, or indicated by the control system. This requirement does not apply to controls which have no effect on the protection against point of operation injuries. The Programmable Controllers also must default to a predetermined safe condition in the event of any single failure within the system.
The following are the OSHA paragraphs which are referred to above:
29 CFR 1910.217 (b)(13)Control reliability. When required by paragraph (c)(5) of this section, the control system shall be constructed so that a failure within the system does not prevent the normal stopping action from being applied to the press when required, but does prevent initiation of a successive stroke until the failure is corrected. The failure shall be detectable be a simple test, or indicated by the control system. This requirement does not apply to those elements of the control system which have no effect on the protection against point of operation injuries.
29 CFR 1910.217 (h)(6)(xvii)Presence sensing device initiation; Cycle control and control systems. Controls with internally stored programs (e.g. mechanical, electro-mechanical, or electronic) shall meet the requirements of paragraph (b)(13) of this section, and shall default to a predetermined safe condition in the event of any single failure within the system. Programmable controllers which meet the requirements for controls with internally stored programs stated above shall be permitted only if all logic elements affecting the safety system and point of operation safety are internally stored and protected in such a manner that they cannot be altered or manipulated by the user to an unsafe condition.
29 CFR 1910.217 (c)(5)Additional requirements for safeguarding. Where the operator feeds or removes parts by placing one or both hands in the point of operation, and a two hand control, presence sensing device of Type B gate or movable barrier (on a part revolution clutch) is used for safeguarding:
(i) The employer shall use a control system and a brake monitor which comply with paragraphs (b)(13) and (14) of this section.
These are only a few of the many regulations pertaining to this subject. For the complete OSHA regulations see the OSHA web site directly.
This page is provided for information purposes only. Compliance to any Federal regulations is the responsibility of the user.