Joyce DCD242 - Manual (Page 3)

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replaced by seller, will be returned to buyer freight collect. This warranty is not intended to
cover consumer products, as defined in the Magnuson-Moss Warranty-Federal Trade
Commission Improvement Act, 15 U. S. C. Sections 2301-12, which are purchased by
buyer for purposes other than resale. If buyer is not intending to resell the products, and if
the products are consumer products as defined in the Magnuson-Moss Act, the foregoing
warranty, but not the limitation of seller's liability, shall be null and void. EXCEPT AS
EXPRESSLY STATED ABOVE, SELLER MAKES NO WARRANTY, EXPRESS OR
IMPLIED, WHETHER OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR
PURPOSE OR USE OR OTHERWISE, ON THE PRODUCTS, OR ON ANY PARTS OR
LABOR FURNISHED DURING THE SALE, DELIVERY OR SERVICING OF THE
PRODUCTS.
1-5 Precautions of Use and Installation
1. Side loading of the lifting screw is not permitted in the dynamic operation of the jack.
A limited side load is allowable in the static condition. Contact Joyce/Dayton for the
allowable side load for a specific application.
2. Mechanical stops are provided on the actuator lifting screw. It is the customer’s
responsibility to provide travel limit devices on all ComDRIVEs®. A mechanical stop is
only an auxiliary device to limit the travel of the lifting screw. Engaging a mechanical
stop during operation can cause damage to the internal jack mechanism.
3. In most applications, factory or manufacturer-assisted installation is not required.
However, it is necessary that appropriate, qualified personnel perform the installation
of Joyce/Dayton products.
4. Joyce/Dayton ComDRIVE® actuators are not rated for shock-loading, extreme
vibration or critical speed conditions (high speed or long-length screw.) It is the
responsibility of the user to ensure these conditions are not imposed on the actuator
or the power transmission equipment. Contact Joyce/Dayton for technical assistance.
5. In the event that service or maintenance is required, the load must be secured or
removed before any work can begin.
6. The ComDRIVE® actuators can be mounted and operated in any orientation. When
used with the lifting screw in a horizontal position, the worm should be mounted
parallel with the horizon and below the gear to ensure proper lubrication. Standard
ComDRIVE® actuators are shipped with all holes plugged. The user must insert the
vent in the highest location at final installation.
7. Never allow the actuator to retract beyond the minimum closed position, as damage to
the jack can occur.
8. Boots or protective bellows covers should be used to protect and keep the lifting
screw clean in dusty or abrasive environments.
9. For continuous or high-duty cycles inquire with your local sales representative or
consult Joyce/Dayton Corp. regarding Bevel Ball actuators.
1-6 General Installation instructions
1. Ensure that all personnel who will service or operate equipment are familiar with its
use and limitations.
2. Secure or remove the load before any installation procedures begin.
3. Be certain the rating of the ComDRIVE® meets or exceeds the load.
4. The ComDRIVE® must be mounted on a structure sufficient to support the maximum
possible load. The structure must be rigid. An under-designed structure could lead to
bending of the lifting screw causing premature wear or failure.
5. In a system with shafts, miter boxes, etc., confirm that the shafts and actuators
operate without binding or excessive force before powered drive devices are engaged.
Drive shaft alignment is critical. Mis-alignment will cause reversing stresses in rotating
members and will lead to fatigue failure. Correct coupling specification is important.
6. When fastening the load to an actuator, make sure the actuator is in the retracted
position. This positions the load accurately with respect to the lifting screw centerline.