Page History

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Author(s):	Lisa Crowder
Reviewer(s):	Bill Mills, Heather Barnes
Editor(s):	Herrmann
Supervisor Approval (Name, Title, Date):
Audience:	Laboratory Specialists
Origination date:
Current version:	374 March 2018
Domain:	Core Lab
System:	Core Splitter

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Main Power 110V. Turn on for power to carriage and motion control
Turn on for power and water to Super Saw Image Modified

Splitting with the Wire and Hook Blades for Soft Sediment

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Issue	Possible Causes	Solution
Carriage does not move with joystick operation	No power to the control unit	Turn 110V isolation switch to On. Home the carriage.
	Motor has reached its torque limit	Reset the controller and home the carriage
	Emergency Stop Button is Engaged	Disengage the Emergency Stop button. Reset the controller and home the carriage
		Digital Servo Controller has been corrupted or damaged.	Reload program into servo controller or replace with spare (see Appendix B)
	No obvious Cause	Get an ET and troubleshoot A hang crank or drill can be be used on the gears to move the carriage.
Carriage only moves in one direction with joystick operation	Limit switch is stuck in engaged position	Disengage and lubricate the limit switch. Reset the controller and home the carriage
	A limit Switch cable is damaged and the circuit is open	Get an ET to examine the cables.
Super Saw does not turn on	No Power to Super Saw	Turn 208V isolation switch to On.
	The overcurrent protection switch is tripped.	Turn power off to the saw. Open the control cabinet and reset the overcurrent protection switch.
	Emergency Stop Button is Engaged	Disengage the Emergency Stop button.
Super Saw stops running while cutting core	Saw blade encounters too much friction and stops. The overcurrent protection switch is tripped to protect the motor.	Turn power off to the saw. Free the saw blade from the core material. Open the control cabinet and reset the overcurrent protection switch.

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The Core Splitter is a very robust piece of equipment and only needs a full service every five years or so. The Core Splitter should only be dismantled under the direct supervision of the Lab Officer or their appointed designee. Have the ship's electricians isolate the power to the Core Splitter before beginning the work.
The following images document, in part, the full dismantling of the Core Splitter in 2015. Additional images are in the Uber Saw folder in IODP_Share.

Removal of the blade flange from the saw motor.

Saw motor before and after refurbishment.

Left: Lifting of the saw housing off of the splitter with a chain hoist.
Right: Lifting of the port end of the splitter with a chain hoist.

Left: Lifting of the port end of the splitter and blocking.
Right: Lifting of the starboard end of the splitter.

Left: Blocking of the starboard end of the splitter.
Right: Removal of the side brackets of the splitting carriage.

Left: Underside of the splitter showing linear actuators and travelling blocks for the splitting carriage.
Right: Top of the linear actuators with the brackets that attach them to the splitter frame.

Left: Linear actuators with brackets removed.
Right: Motor shaft separated for cleaning and inspection.

Left: Removal of the protective cover of the actuator belt drive.
Right: Linear actuator belt.

Left: Linear actuator travelling block.
Right: Belt attachment to travelling block.

Left: Travelling block limit switch, one of two.
Right: