Hot Air Welding, Hot Wedge Welding

T300 Extreme Spline

T300 Extreme Spline Attachment Welding System

A complete, semi-automated solution for attaching spine to your blinds, shades and awnings. The T300 Extreme Spline System is built to move your spline at the precise speed needed to create the best looking flat seams. With speeds up to 15 feet per minute, the T300 Extreme Spline System will produce your blinds, shades and awnings fast and easy all day long. No seamstress skills needed, as the conveyor is automatically synced to the welder.
Best For:
  • Awnings
  • Blinds
  • Pergolas
  • Screens
  • Shades/Tension Structure
  • Shelters Structures
Seam Type:
  • Fin Prayer Seam Fin Prayer Seam
  • Hem Hem
  • Hem with Pocket Hem with Pocket
  • Hem with Rope Hem with Rope
  • Extrusion Beading Extrusion Beading
  • Webbing - SEG Webbing - SEG
Features & Options

Features & Benefits

  • Quick setting recall with easy operation touch screen and recipe storage
  • Automated Conveyor fee for reduction of wrinkles and easy of use
  • Hot rotary welding technology to significantly increase production
  • Automated spline pay off for less material handling
  • Quick, repeatable head adjustments for precision welding
  • Multiple seam configurations for quick, easy guide change

Technical Specs

Power Requirements

  • 208 - 240 Volts - Single Phase - 25 Amp.
  • 380 - 400 Volts - Single Phase -15 Amp.

Air Requirements

  • 2cfm @ 100psi

Power Consumption

  • Approx. 6kw

Maximum Temperature

  • Hot Air: 730° C (1,346˚F)
  • Hot Wedge: 450° C (842˚F)

Throat Width

  • 1m (39")


  • Width: 0.6m (23")
  • Length: 7.6m (300")
  • Height: 1.5m (59")


  • 231kg (509lb) - T300 Only

Seam Width

  • 10 - 50m (0.5 - 2”)**

Welding Cycle

  • Up to 30m/min (100ft/min)*

* Depending on the application, the seam width and the type of material used
**Additional guides might be necessary
Our Training Process

Trust Miller Weldmaster to get your started!


Schedule Your Training

A Miller Weldmaster certified field service engineer will contact you to schedule installation and training at your facility. 

Installation Preparation

We provide you with everything you need to know to get your team ready for installation and training.

Staff Training

Your staff will receive extensive instruction on welding equipment operation and maintenance and how to produce your product.



Machine Videos

  • Overview & How Tos
  • Training Videos
How to Apply Spline to your Blinds and Shades - T300 Extreme Spline System
Hot Air Welder with Synchronized Conveyor for Reinforced Blinds and Screens
Tech Tip I How to Change HMI & PLC Battery I T300 Extreme
Wedge Alignment I Miller Weldmaster
Tech Tip I Start Weld Edge Fabric I T300 Extreme
T-SERIES I How to Adjust your Hem Guide I Miller Weldmaster
Tech Tip I How to Tighten your Weld Rollers I T300 Extreme
Changing Heat Systems on T300 I Miller Weldmaster
How To Clean your Air Filters on the Compressors
Explaining the Upper Roller Speed

Service & Resolution Center

Our service team is dedicated to keeping our customer’s businesses running at optimal performance and assisting with any solutions you need. We are standing by to help you.

Contact Us Today!

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