DMG MORI ADC Cycle for Gun Drilling: Programming Guide

DMG MORI ADC Cycle Programming Guide

DMG MORI’s Adaptive Drilling Control (ADC) is a closed-loop adaptive system that monitors coolant pressure, flow rate, and spindle load in real-time to automatically optimize deep hole and gun drilling parameters. This guide covers ADC programming, G-code parameter setup, and integration with the machine control.

ADC Cycle Modes

ADC offers three operating modes accessed through the CELOS X interface or programmed via G-code:

Mode	Cycle Name	Application	Key Parameters Monitored
Standard	ADC_STANDARD	Conventional drilling < 5×D	Spindle load
Deep hole	ADC_DEEP	BTA and ejector drilling 5–50×D	Load + coolant pressure + flow
Gun drilling	ADC_GUN	Single-lip gun drilling up to 300×D	Load + pressure + flow + feed optimization

G-Code Programming

Basic ADC Gun Drilling Cycle

 1N100 T01 M06 (Gun drill, Ø5 mm)
 2N110 G00 X0 Y0 Z50.0 (Position above part)
 3N120 M41 (High-pressure coolant ON)
 4N130 G00 Z5.0 (Rapid to R-plane)
 5
 6N140 ADC_GUN Z-100.0 Q5.0 P0.5 F0.02 (ADC gun drilling cycle)
 7N150 G80 (Cancel cycle)
 8N160 M09 (Coolant OFF)
 9
10N170 G00 Z100.0 (Retract)
11N180 M30 (End)

ADC Parameters

Parameter	Description	ADC_GUN	ADC_DEEP
Z	Final hole depth	✓	✓
Q	Initial peck depth	✓	✓
P	Dwell time at bottom (seconds)	✓	✓
F	Feed rate	✓	✓
V1	Max spindle load threshold (%)	✓	✓
V2	Min coolant pressure threshold (bar)	✓	✓
V3	Min coolant flow threshold (L/min)	✓	✓

Extended ADC Configuration

1N140 ADC_GUN Z-100.0 Q5.0 P0.5 F0.02 V1=130 V2=20 V3=80
2
3V1=130:  Spindle load alarm at 130% of baseline
4V2=20:   Minimum coolant pressure 20 bar (alarm if below)
5V3=80:   Minimum coolant flow 80 L/min (alarm if below)

If the V parameters are omitted, ADC uses default thresholds calculated from the first three pecks (baseline learning).

Baseline Learning Process

ADC automatically establishes baseline parameter readings during the first three pecks:

Peck 1: Measure spindle load, coolant pressure, flow
Peck 2: Measure and average with peck 1
Peck 3: Establish baseline = average of pecks 1–3
        Set thresholds: Load = baseline × V1% (default 130%)
                        Pressure = baseline × V2% (default 80%)
                        Flow = baseline × V3% (default 80%)

During this learning phase, ADC operates conservatively. After baseline is established, adaptive control begins.

Adaptive Responses by Signal

Spindle Load Responses

Load Condition	ADC Response	Display Message
Load > 110% baseline	Reduce feed by 10%	“ADC: Reducing feed — high load”
Load > 130% baseline (V1 threshold)	Pause feed, retract 2 mm, resume	“ADC: Chip clearance cycle”
Load > 150% baseline	Stop feed, alarm	“ADC: Tool overload — check tool”
Load returns to normal	Gradually restore feed to original	“ADC: Feed restored”

Coolant Pressure Responses

Pressure Condition	ADC Response	Display Message
Pressure drops 10% below set point	Alert operator — check filters	“ADC: Coolant pressure low — check filters”
Pressure drops 20% below set point (V2 threshold)	Stop cycle, alarm	“ADC: Coolant pressure critical”
Pressure spikes 20% above set point	Pause feed, retract 2 mm	“ADC: Possible chip blockage — clearing”
Pressure recovers	Resume cycle automatically	“ADC: Coolant restored — resuming”

Coolant Flow Responses

Flow Condition	ADC Response	Display Message
Flow drops 15% below set point	Reduce feed 10%; monitor	“ADC: Flow decreasing — adjusting”
Flow drops 30% below set point (V3 threshold)	Stop cycle, alarm	“ADC: Coolant flow critical — check pump”
Flow intermittent	Alert operator	“ADC: Inconsistent coolant flow”

Programming Examples

Example 1: Standard Gun Drilling

 1; Ø5 mm × 80 mm deep in 4140 steel
 2T01 M06
 3G00 X0 Y0 Z50.0
 4M41
 5G00 Z5.0
 6ADC_GUN Z-80.0 Q4.0 P0.3 F0.015
 7G80
 8M09
 9G00 Z100.0
10M30

Example 2: Deep Hole with Custom Thresholds

For more aggressive operation with higher sensitivity:

 1; Ø8 mm × 200 mm deep in stainless steel
 2T02 M06
 3G00 X0 Y0 Z50.0
 4M41
 5G00 Z5.0
 6ADC_GUN Z-200.0 Q6.0 P0.5 F0.02 V1=120 V2=25 V3=100
 7; V1=120 (20% tighter load threshold)
 8; V2=25 (higher minimum pressure for stainless)
 9; V3=100 (higher minimum flow for chip evacuation)
10G80
11M09
12G00 Z100.0
13M30

Example 3: BTA Deep Hole Drilling with ADC_DEEP

 1; BTA Ø30 mm × 600 mm deep in 4140 steel
 2T03 M06
 3G00 X0 Y0 Z100.0
 4M41
 5G00 Z10.0
 6ADC_DEEP Z-600.0 Q15.0 P0.2 F0.18 V1=125 V2=25 V3=150
 7G80
 8M09
 9G00 Z150.0
10M30

ADC vs Conventional G83: Parameter Comparison

Aspect	G83 (Standard)	ADC_GUN	Advantage
Peck depth	Fixed Q	Adaptive (reduced at high load)	ADC protects tool
Feed rate	Fixed F	Variable (reduced on overload)	Prevents breakage
Coolant monitoring	None	Continuous pressure + flow	Detects blockage early
Tool protection	Hard stops only	Gradual + emergency	Fewer breakages
Programming	2 lines	2 lines + optional V params	Similar effort
Setup	Trial-and-error Q	Self-learning baseline	Faster setup

ADC on CELOS X

On DMG MORI machines with CELOS X:

Select drilling operation
Choose “Adaptive Drilling” from cycle menu
Select mode (Standard / Deep Hole / Gun Drilling)
Enter hole parameters (depth, peck, feed)
Set thresholds (optional — defaults suitable for most)
Generate program

Dashboard Display

During ADC operation, CELOS X shows:

Real-time spindle load graph (%)
Coolant pressure (bar) and flow (L/min)
Adaptive feed rate (current % of programmed)
Event log (all ADC adjustments)

Summary

Programming DMG MORI ADC for gun drilling requires minimal code changes from conventional G83 — replace G83 with ADC_GUN, add optional V parameters for custom thresholds, and the adaptive system handles the rest. ADC learns baseline conditions during the first three pecks, then continuously monitors spindle load, coolant pressure, and flow to automatically adjust feed rate and detect developing problems before they cause tool breakage. For deep hole drilling mode (BTA/ejector), use ADC_DEEP with appropriate thresholds. For ADC technology details, see DMG MORI adaptive drilling control technology. For general CNC programming, see CNC deep hole drilling G-code guide.