MODIFICATION
Z -- ELECTRONIC CYLINDER LIFTING SYSTEM
- Notice Date
- 4/13/2006
- Notice Type
- Modification
- NAICS
- 332721
— Precision Turned Product Manufacturing
- Contracting Office
- NASA/George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812
- ZIP Code
- 35812
- Solicitation Number
- NNM06151529Q
- Response Due
- 4/17/2006
- Archive Date
- 4/13/2007
- Description
- THIS NOTICE CONSTITUTES AMENDMENT NO. 2 TO THE COMBINED SYNOPSIS/RFQ FOR ELECTRONIC CYLINDER LIFTING SYSTEM. Companies shall acknowledge all amendment(s) in their quote. This notice serves as the official amendment to subject synopsis/RFQ and a written amendment will not be issued. The purpose of this amendment is to answer questions asked before the due date. 1. Question: Will Parker brand electric cylinders and motors be accepted if load and performance criteria is met? Answer: Yes 2. Question: We will use cylinder type proximity switches for travel limits and home position. Is this acceptable We typically use 24 VDC with NPN transistor output switches. Is that acceptable? Answer: As for determination of the applicablility of the proposed cylinder type proximity switches for travel limits and home position and the use of a certain voltage and output switch type, the system has been specified to meet prescribed performance criteria. It is not part of the specifications to dictate exactly how those criteria are met. Objective evidence of compliance of the performance criteria is what is required. 3. Question: Part of the specification calls for the system to re-adjust, realign and resynchronize the four matched sets of servo motors and electric cylinders if the chamber dome level attitude is ever violated. We can provide a "synchronize" button on the operator panel to perform that function provided power to the encoders is maintained. We typically provide a "background" 24 VDC supply to the encoders on the servo motors in order to preserve the position as long as the power supply to the main cabinet is not turned off. In the event of a power down condition, if "normal" encoders are used, the system will require re-homing before use. If absolute encoders are used, absolute position will be maintained through a complete power down. Will absolute encoders be required for this application? Answer: The intent of the performance criteria is to re-adjust, re-align, re-synchronize the system when a fault has caused the horizonatally level attitude of the chamber dome to have been violated. It is not intended that any power down condition should cause the need to exercise the automatic process of re-adjustment, re-alignment, re-synchronization. 4. Question: The specification is somewhat ambiguous as to the number of brakes. Will a brake be required on the motor or both the motor AND the cylinder? Answer: The specified performance criteria state the types of motion that must be eliminated by the application of braking within the system. Again, it is not part of the specifications to dictate exactly how those criteria are met. Objective evidence of compliance of the performance criteria is what is required. Each matched set of servo motor and electric cyclinder must have independent brakes. 5. Question: Will variable speed be required with the jog joystick controller If not, the jog speed can be programmed through the operator terminal and the motors will accelerate and jog at that fixed speed using discrete control. Answer: The jog control joystick will initiate motion in the direction commanded at whatever speed is set prior to issuance of the command. Variable speed is required, but is not required to be set or changed by the jog control joystick. 6. Question: Installation and training is not specified on the solicitation. Note 4 on sheet 1 of 4 calls for transfer of holes and mounting a plate to the existing frame. What is the specific scope of installation, set up and training Answer: This is instructions for drilling holes in the existing frame located at MSFC. No special training required. 7. Question: My intent is to set up and tune the servos at MSFC. Would this be acceptable Answer: Yes 8. Question: Will the 10,000 lb proof loading take place at MSFC? Will the 10,000 lb load be supplied there? Answer: Yes, Yes The due date for receipt of offers is not extended. Companies shall provide the information stated in the synopsis/RFQ posted on the NASA Acquisition Internet Service (NAIS) on April 3, 2006. Documents related to this procurement are available over the Internet. These documents reside on a World Wide Web (WWW) server which may be accessed using a WWW browser application. The Internet site, or URL, for the NASA/MSFC Business Opportunities home page is http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=62
- Web Link
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Click here for the latest information about this notice
(http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=62#119622)
- Record
- SN01027812-W 20060415/060413222022 (fbodaily.com)
- Source
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