Hypertherm 428895 Cartridge Ohmic Ring Kit SmartSYNC (3 Pack)

Main Purpose:

Essential accessory for torch height control (THC) on CNC plasma cutting tables using SmartSYNC mechanized cartridges

What It Does: The ohmic contact ring clips onto any SmartSYNC mechanized cartridge and connects via electrical wire to torch height controls (THCs) that use ohmic contact sensing to find the surface of the workpiece before each cut.

"Ohmic Contact" Explained: Refers to the electrical connection made between the torch and the workpiece when the torch touches the workpiece during initial height sensing. This creates a complete electrical circuit that signals the THC that contact has been made, allowing precise measurement of material surface height.

⚙️ Specifications:

1. Part Number: 428895
2. Product Type: Ohmic Ring Kit (Height Sensing Accessory)
3. Package Quantity: 3 rings per kit
4. Material: Conductive metal (copper alloy)
5. Installation: Clips onto mechanized cartridge
6. Connection: Via electrical wire to THC
7. Application: CNC/mechanized cutting with torch height control
8. Compatibility: ALL SmartSYNC mechanized cartridges
9. Function: Initial height sensing (IHS) via ohmic contact

🎯 What Are Ohmic Rings For?

Primary Function:

Accurate torch height detection before starting each cut

How It Works:

1. Before cutting starts: Torch moves down toward workpiece
2. Ohmic ring makes contact: Completes electrical circuit when it touches material
3. THC detects contact: Knows exact surface height location
4. Torch retracts to pierce height: Lifts to programmed distance
5. Pierce starts: Arc initiates at correct height
6. Cutting begins: THC maintains proper cutting height throughout

Why Ohmic Sensing is Critical:

Without Ohmic Sensing (Float/Voltage-Only):

1. ❌ First pierce quality inconsistent
2. ❌ Must guess at initial height
3. ❌ Warped material causes pierce failures
4. ❌ Variable material thickness problematic
5. ❌ More scrap parts from bad starts

With Ohmic Sensing (Using 428895 Rings):

1. ✅ Perfect pierce every time
2. ✅ Automatically finds material surface
3. ✅ Handles warped/uneven material
4. ✅ Works with varying material thickness
5. ✅ Dramatically reduced scrap
6. ✅ Faster setup and production
7. ✅ Essentially required for professional CNC cutting

🔧 Compatibility:

Compatible With:

ALL SmartSYNC Mechanized Cutting Cartridges:

1. ✅ 428925 - 45A Mechanized Cutting
2. ✅ 428926 - 30-45A FineCut Mechanized
3. ✅ 428930 - 65A Mechanized Cutting
4. ✅ 428934 - 85A Mechanized Cutting
5. ✅ 428936 - 105A Mechanized Cutting

Compatible Systems:

1. ✅ Powermax 45 SYNC (with SmartSYNC mechanized torch)
2. ✅ Powermax 45 XP (with SmartSYNC mechanized torch + adapter)
3. ✅ Powermax 65 SYNC (with SmartSYNC mechanized torch)
4. ✅ Powermax 65 (with SmartSYNC mechanized torch + adapter)
5. ✅ Powermax 85 SYNC (with SmartSYNC mechanized torch)
6. ✅ Powermax 85 (with SmartSYNC mechanized torch + adapter)
7. ✅ Powermax 105 SYNC (with SmartSYNC mechanized torch)
8. ✅ Powermax 105 (with SmartSYNC mechanized torch + adapter)

Required Equipment:

1. ✅ SmartSYNC mechanized/machine torch
2. ✅ CNC plasma cutting table
3. ✅ Torch Height Control (THC) with ohmic sensing capability
4. ✅ Proper THC wiring harness

NOT Compatible With:

1. ❌ Hand/drag cutting cartridges (no need for ohmic rings on hand cutting)
2. ❌ Tables without torch height control
3. ❌ THCs that don't support ohmic sensing (voltage-only THCs)