CNC

Choosing between a dedicated deep hole drilling machine and using a standard CNC machine depends on the volume and depth requirements. I have worked with both configurations across multiple shops and the answer is rarely a simple one-size-fits-all. Over the years I have developed a framework for making this decision based on production volume, depth-to-diameter ratio, and tolerance requirements. Cost Breakdown: Dedicated vs Standard Machine A dedicated deep hole drilling machine costs $150,000 to $400,000 new, but the purchase price is only the beginning. When I put together a full cost comparison for a shop considering this investment, I look at several categories beyond the machine itself. ...

Systematic Approach to CNC Control Faults CNC control problems can stop production for hours or days if you chase symptoms without a plan. I have developed a systematic approach over 15 years of maintaining deep hole drilling machines with Fanuc, Siemens, and Mitsubishi controls. The approach works across all brands. I always start with the power supply. A control that will not power up usually has a blown fuse or tripped breaker. I check the main power input at the disconnect switch, then trace through the transformer to the control power supply module. A loose connection on the transformer tap can cause intermittent shutdowns that are hard to reproduce. ...

The CNC control is the interface between the operator and the machine. For deep hole drilling, the control needs specific features that general machining centers don’t always have. I’ve worked with FANUC, Siemens, and Heidenhain controls on deep hole drilling machines. Each has its strengths. What Deep Hole Drilling Needs A CNC control for deep hole drilling needs: Pecking cycles. The control should support programmable peck depth, retract distance, and feed rate for each peck. Variable feed. The ability to reduce feed at entry and exit, where the cutting forces change. Spindle load monitoring. The control should monitor the load on the spindle and trigger an alarm or stop if the load exceeds a threshold. Coolant pressure monitoring. The control should monitor coolant pressure and stop the machine if pressure drops below a set point. Tool life management. The control should track the number of holes drilled per tool and remind the operator to change tools at the right interval. These features are available on most modern CNC controls, but they need to be set up correctly for deep hole drilling applications. ...