The Schtec CM 620 CNC Corner Cleaning Machine

Aluminium-Corner-Crimping-Machines-Cm-620-4

CM 620 CNC Corner Cleaning Machine

Name: CM 620 CNC Corner Cleaning Machine
Brand: Schtec
SKU: CM-620

Schtec CM 620: High-speed CNC for automatic PVC corner cleaning. two-axis servo ensures precision on white/colored profiles. 400+ frames/8 hours for large lines.

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SKU: CM-620

Category: Corner Cleaning Machines

High speed and accuracy corner cleaning with Servo System controlled two Axes
Automatic knife selection for selected profile foil type (colour / white)
High quality corner cleaning result through durable special knife and bit designs
High quality cleaning results on surfaces by automatic measurement system
Industrial PC Based Control System (Beckhoff)
Remote desktop connection by way of Wifi or Network connection
File transfer by USB or network
Easy programming support via DXF,DWG file extensions
Central lubrication system for all bearings, axis and sliding bearings
15” TouchScreen
High performance industrial PC working between 0C – 55C with operating system Windows XP Embedded and fanless design
All alarm sand messages can shown on the machine interface by way of software which developed by SCHTEC Software R&D Department.
By way of using private remote desktop connection, which developed by SCHTEC Software R&D Department, expert service technicians can connect true machine automation system and machine interface for fixing or determine problems.

Optional Features

Additional tool for sliding frames inside surface cleaning
Additional tool for monoblock frames inner surface cleaning
Expanding to Single Line by way of connection to 4 point welder with two axes robotic design turning table.
Earning 12 m² on working area with benefit of the brand new design turning table placed on the corner of the line

Product Description

The Schtec CM 620 is a high-speed CNC machine developed for automatic corner cleaning in PVC window and door production. It features a two-axis servo system and delivers precise surface cleaning for both white and colored profiles. With an automatic measurement system and DXF/DWG programming support, it offers a user-friendly and efficient operation. With a production capacity of 400+ frames 8 hours, it is suitable for integration into large-scale production lines.

Frequently Asked Questions

Find quick answers to common questions about our Corner Cleaning Machines.

1. What is the purpose of a corner cleaning machine in PVC profile production?

A corner cleaning machine removes the excess welding flash, burrs, and material residues from the welded 90° corners of PVC frames, delivering clean and precise edges. It ensures that frames are ready for sealing, glazing or further finish without manual rework. Proper cleaning avoids interference with gaskets, joints, and hardware, improving product aesthetics and performance. In automated lines, corner cleaning is an essential finishing step to maintain throughput and quality consistency.

2. What features are essential in a high‑performance corner cleaning machine?

Key features include servo‑driven multi‑axis control, automatic knife selection for different profile foils (colour/white), high‑precision centering and clamping systems, tool change mechanisms, and PC‑based control with remote diagnostics. A reliable lubrication system, automatic measurement of profile surfaces, and alarm system further enhance reliability. The machine should support DXF/DWG input or profile program files for flexibility. All these features work together to ensure fast, accurate, and repeatable corner cleaning.

3. How does CM 620 Corner Cleaning Machine perform and which strengths does it bring?

The CM 620 offers high‑speed and high‑accuracy corner cleaning using a 2‑axis servo system. It supports automatic knife selection depending on profile foil (colour or white), improving adaptability. The control is via industrial PC, supporting DXF/DWG import, remote connection (WiFi/Network), and centralized lubrication. It also has features like automatic measurement of profile surfaces and real‑time error reporting through its HMI.

4. What are the advantages and limitations of a simpler machine like CC 254 Four Cutter Corner Cleaning Machine?

The CC 254 uses four cutters to trim weld flash and burrs from frames. It has automatic centering for welded frames, vertical clamps for profile stabilization, and durable special knives suitable for foiled or white profiles. Its simplicity leads to lower cost and easier maintenance, but it may be less flexible in handling diverse profile shapes or foil types compared to CNC models.

5. What maintenance practices help keep corner cleaning machines operating reliably?

Keep cutting knives and bits sharp and free of residue, and inspect them for wear regularly. Clean the clamping and centering systems to prevent debris accumulation that can affect accuracy. Periodically calibrate servo axes, sensors, and measurement systems to maintain precision. Verify lubrication, air supply lines, and system seals, and monitor alarms or fault logs for early signs of drift. Implement preventive maintenance schedules to reduce unplanned stops and maintain product quality.

Voltage	400 V AC, 3 P, 50/60 Hz
Power Consumption	7 kW, 18 A
Air Pressure	6–8 bar
Air Consumption	110 lt./min
Saw Blade Details	Ø 250 x Ø 30 x 3.2 mm, Z=80
Saw Blade rpm	5,200 rpm
Drillers rpm	14,000 rpm
Max. Axes Speed	45 m/min
Max. Outer Frame Dimension	Limitless (Automatic Mode: 2,300 x 2,300 mm)
Min. Outer Frame Dimension	380 x 380 mm (Automatic Mode: 450 x 450 mm)
Max. Profile Height	160 mm (depending on the profile type, different regions can be cleaned)
Min. Profile Height	35 mm
Max. Profile Width	130 mm
Machine Height	1,900 mm
Machine Length	2,150 mm
Machine Width	1,250 mm
Machine Weight	960 kg
Tool Count	12 pieces
Capacity	400–440 frames / 8 hours (based on one corner cleaning time)

CM 620 CNC Corner Cleaning Machine

Standard Features