will be needed to document the whole process. The top section also includes a sheet numbering system (Sheet _____of _____). This information must be included. Other information included on the operation sheet header is the material, the raw stock size for the part, and the operations list.
CNC Setup Sheet
The CNC setup sheet is the document that tells the machinist what tools are to be used and any specific information related to tools. For instance, it may be necessary to have a certain amount of tool projection/extension for a drill to be able to completely machine through a part. This document is where the operator/CNC machinist finds this information. In Part 5 of this text, you will be introduced to CAD/CAM and how you can develop CNC setup sheets within the CAD/CAM programs. Many companies today are going to “paperless” factories, wherein these documents will be on the intranet in electronic form. The CNC setup sheet has two sections (Chart 1-2). The top section is for reference information and includes:
• The date the document is prepared or revised
• The name of the person preparing it
• The part name and part number (from the engineering drawing or blueprint)
• The machine being used
Note: If more than one machine is to be used to manufacture a single part, separate setup sheets are completed for each machine.
• The CNC part program used in the manufacturing process
• Workpiece zero reference points for the part (program zero)
• Work holding devices
Note: If more than one device is needed, the operation number(s) and process are also included.
The lower half of this form lists the tool(s) by number, description, and offset. There is a column for comments, remarks, or explanations, if needed. Specific tool requirements, like minimum tool length projection/extension, can be entered in the comments section.
Chart 1-2Process Planning CNC Setup Sheet
| Date | Prepared By |
| Part Name | Part Number |
| Machine | Program Number |
Workpiece Zero: X __________Y __________Z __________
Setup Description:
| Tool Number | Offset Number | Tool Description | Comments |
Quality Control Check Sheet
This planning document is used for the final inspection stage of the machining process. Once the part is completed, it is necessary to check all of the dimensions listed from the engineering drawing or blueprint to verify they are within the specified tolerance. The Quality Control Check Sheet is an excellent method to document the results of this inspection and a valuable tracking tool.
Reference information is similar to the other planning documents. Included are:
• The date the document is prepared or revised
• The name of the person checking the part
• The part name and part number (from the engineering drawing or blueprint).
On the check sheet, 100% of the engineering drawing or blueprint dimensions and their tolerances are written down in list form. Using this method, sequentially go through each of the dimensions and log the results. This assures that the machined part meets the specifications given on the engineering drawing or blueprint. As the part is checked and verified, some dimensions may not meet specifications. It is important to identify these incorrect values, emphasizing them for correction whether with red ink or a highlighter pen (or by changing font color or highlight if in electronic form). You could also include details in the comments section of the QC Check Sheet (Chart
