This 1990 ElTee Pulsitron TRM-21 is a USA-built ram-type (sinker) EDM elevated by an EP300CP programmable Z-axis cycle control and a VMC CNC orbiting system (C-axis), giving it true vector machining on top of 8" x 6" x 10.5" of X/Y/Z travel, a 16" x 11" work table, a 17-3/8" max quill clearance, and a 19-3/4" x 14-3/4" x 12" dielectric tank holding 55 gallons. Its 30-amp power supply, Futaba 3-axis DRO, System 3R platen chuck, and 5" x 10" O.S. Walker fine-division LBP magnetic chuck with Neutrofier variable-hold control let a toolmaker burn cavities, details, and orbited forms — with the VMC controlling horizontal movement in 50-millionths increments, orbiting in any direction in 1° steps, and running preprogrammed triangular, square, hex, and round shapes. Against a basic manual ElTee Pulsitron ram EDM that depends on hand downfeed with no orbiting, this EP300CP-equipped TRM-21 adds programmable Z-axis cycles and the VMC vector machining control — upgrades that eliminate corner-radii problems, allow center correction without losing the program, and enable thread cutting and straight undercuts by moving horizontally under servo control with no Z-axis motion, turning a single-axis burner into a multi-axis orbiting EDM.

MakeElTee
ModelPulsitron TRM-21
Year2010 or older
Product #16952
Price Please login to see price.

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About This Machine

This USA-built ElTee Pulsitron TRM-21 is more than a sinker — its EP300CP programmable-Z control and VMC CNC orbiting system let you burn square, hex, and round cavities, thread forms, and corner-radius-free details that a manual ram EDM can't touch. With 8" x 6" x 10.5" travels, a System 3R platen, an O.S. Walker magnetic chuck, and 50-millionths orbit resolution, it drops a true vector-machining EDM into your toolroom ready to run repeatable cavity work the week it lands.

**All descriptions and specifications are preliminary and must be confirmed by buyer prior to purchase.**

Live Tooling / Milling

Specifications

Vertical Table / Pallet Size: 16" x 11""

X-Travel: 8.00"

Y-Travel: 6.00"

Z-Travel: 10.50"

Max Table/Pallet Load: 300lbs

Max Workpiece Weight: 300lbs

EDM Tank Size: 19.75" x 14.75" x 12"

EDM Tank Capacity: 55 Gallons (Dielectric) gallons

Spindle

Second Spindle

Tool Changer

Turret

Control

Control Make/Model: EP300CP / VMC CNC Orbiting Control

Tailstock / Steadyrest

Options

Product Description: Type: Ram-Type (Sinker) EDM with VMC CNC Orbiting System (C-Axis)
Max Quill Clearance: 17-3/8"
Min Quill Clearance: 5-3/8"
Work Table: 16" x 11"
Max Table Load Capacity: 300 lbs
Max Electrode Load on Quill: 100 lbs (22 lbs With Magnetic Tooling)
Work Tank Size: 19-3/4" x 14-3/4" x 12"
Dielectric Required: 55 Gallons
Power Supply: ElTee Pulsitron EP300CP Programmable Z-Axis Cycle Control, 30 Amp
Pendant for Power Z-Axis (Rapid Up/Down & Jog Increments)
Futaba 3-Axis Digital Readout Display
System 3R Chuck on the Platen
Hold-Off-Release Chuck Control Switch
5" x 10" O.S. Walker Fine-Division "LBP" Electro-Magnetic Chuck
O.S. Walker Variable Hold Neutrofier Control
Hand Cross Feed
Wired: 3/60/208V, 8 KVA Full Load

VMC CNC Orbiting System (Vector Machining Control):
3-Axis Multiple DNC System, Servo-Controlled in 3 Axes
Horizontal (Orbit) Capacity: 0.200" / 5 mm Each Side of Center
Horizontal Movement Controlled in 50-Millionths Increments
Orbiting in Any Horizontal Direction in 1° Increments
Preprogrammed Shapes: Triangular, Square, Hex & Round (Auto Corner Calculation)
Increment Depth Selection for Poor Flushing Conditions
Taper Cutting with Straight Electrode Within XYZ Limits
Horizontal Servo Movement Without Z-Axis Motion (Thread Cutting / Straight Undercut)
Eliminates Corner-Radii Problems
Center Correction Without Losing Program
CRT Display of Program Mode

*Made in USA*

Electrical: 3PH / 208V / 8 KVA