Servo Roll Feeds

Servo Feeds

The RF Series

The RF Series feeds are ideal for medium to heavy duty stamping and cut-to-length applications. This series comes in six sizes, ranging from 2.5" to 8" diameter feed rolls in an array of coil widths. High torque servo motors that drive either planetary or helical-bevel reducers make the RF series both powerful and precise.

RF-2.5 Series Servo Feeds

RF-2.5 Series servo feeds are designed to provide an economical means of employing servo feed technology on smaller presses without sacrificing quality, accuracy, durability or power.

Servo FeedThe mechanical design of the RF-2.5 Series sets it apart. Consider the standard features on every model: Maintenance-Free AC brushless servo motor; a Kevlar non-stretch timing belt transfers power to the feed rolls; solid, full width, matte finish feed rolls; adjustable stroke air cylinder for roll pressure and pilot release; pivoting upper roll assembly maintains full gear mesh at any thickness; heavy duty, “C” frame, Slide & Clamp edge guide; slotted press mounting plate; entrance curve section and remote jog pendant with four modes.

Servo Feed All RF-2.5 Series servo feeds can be equipped with an optional, adjustable height cabinet base.
Servo Feed All RF Series servo are available in a Push-Pull configuration and operate synchronously from a single control.
Servo Feed Designed for blanking out diameters, zig/zag servo feeds can be programmed to perform from two to multiple out blanks, typically saving at least 8% in material costs.
Servo Feed

Servo Feed Specifications

RF 2.5 Series
Model RF-2.5 (63.5)
Width (in/mm)
Capacity
Full Width (in/mm)
Capacity
With PTS (in/mm)
 
6 / 152.4 0.187 / 4.75 0.120 / 3.05  
12 / 305 0.156 / 3.96 0.105 / 2.67  
18 / 458 0.125 / 3.18 0.080 / 2.03  
24 / 610 0.094 / 2.39 0.060 / 1.52  
30 / 762 0.063 / 1.60 0.035 / 0.89  
Ratings are for mild steel.

Standard Features

Optional Features

  • Remote jog with jog-to-length
  • Entrance curve section for material support
  • Heavy-duty, slide & clamp edge guides
  • Color Touch screen operator interface
  • 200 job memory
  • On-the-fly, micro adjust feature
  • English/Spanish, Inch/Metric
  • Batch counter
  • Hand crank, self-centering edge guides with Digital Position Readout
  • Hand crank adjustable press mounting plate
  • Adjustable passline height cabinet base
  • Motorized passline height adjustment
  • "No Tools Required" passline height adjustment
  • End-of-stock sensor
  • Pull-thru straighteners

RF Series Servo Feeds

Servo Feed

 

The exceptional mechanical design of the RF Series sets it apart from many other feed designs. Horizontal tie-bars provide significant structural rigidity. Feed rolls are full diameter across the entire rated width of the feed. Sealed-for-life spherical roller bearings are used to support the feed rolls.

All RF Series feeds can be equipped with a pull-thru straightener.

Servo Feed The rolls raise and lower on a pivot, rather than up and down in a slide block, to ensue full gear mesh regardless of the thickness of the material.
Servo Feed The roll pressure is applied by two adjustable-stroke pneumatic cylinders. Roll pressure is adjusted by a supplied regulator. The same cylinders are also used for the pilot release of the upper feed roll. These cylinders are positioned well past the center point of the rolls to provide leverage for optimum pressure to the roll.

Standard Features

Optional Features

  • Adjustable height cabinet (optional on RF-2.5 and RF 3)
  • Remote jog pendant with jog-to-length
  • Curve section or chute support bracket
  • Heavy-duty adjustable entry guides
  • Color touch screen Operator Interface
  • 200 Job Memory
  • On-the-fly, micro-adjust feature
  • English/Spanish, Inch/Metric
  • Feed complete output
  • Batch counter
  • Motorized passline height adjustment for cabinet
  • "No tools required" passline height adjustment
  • Dual Roll Vertical Guides
  • Hand crank adjusted entry guides
  • Anti-backup rolls
  • Power adjusted entry guides
  • End-of-stock sensor
  • Pull-thru straighteners (optional pilot release feature available)
  • Transformer (for other than 460 volt only)
  • Up to 150 horsepower drives

Servo Feed Controls

Servo Feed

Feed Lease Corporation is proud to employ top quality controls on every servo feed. Feed Lease servo feeds utilize, as standard, a Control Techniques (Emerson) drive for superior performance. Since no components of the electronic system are proprietary, our customers have the option of using their local distributor for any replacement parts.

Optional I/O are available for more advanced systems. For example, our optional Line Automation allows any powered axis to be stored in the job recipe and automatically set to position when a given job is loaded.

Servo Feed 1000 Series control, standard on
RF 2.5 and RF 3 models, with color touch screen operator interface.
Servo Feed 5000 Series control, standard on all RF 4 through RF 8 models,
with color touch screen operator interface.

Standard Features

Optional Features

  • Brushless servo motors
  • Servo feeds up to 150 HP
  • Jog forward/reverse - Slow/Fast
  • Jog-to-length - Slow/Fast
  • Auto/Manual mode
  • Serial interface available
  • Feed complete output (optional on RF 2.5 and RF 3 Series)
  • 200 recipe storage
  • Color touch screen operator interface
  • Micro adjust plus/minus
  • Setup mode password protection
  • Feed length to 0 to 999.999
  • Batch and part count
  • Press too fast fault
  • E-Stop
  • Loop Optimization: Enables communication between feeder and straightener for advanced loop control.
  • Line Automation: Allows for "one button" setup of entire feed line. Any powered axis may be automated. Position of automated axis is stored in recipe storage

Servo Feed Options

Servo Feed Dual Roll Vertical Guides Servo Feed "No Tools Required" Passline Height Adjustment
Servo Feed Hand Crank Adjustable Vertical Guides Servo Feed Floor Stand with Guide Bars
Servo Feed Motorized Vertical Guides Servo Feed Anti-Back-up Rolls
Servo Feed Pull-Through Straightener Servo Feed Material Support Table
Servo Feed Heavy Duty Pull-Thru Straightener With Pilot Release    
RF Series
Feed Roll Diameter (in/mm)
Width
(in/mm)
RF 3
Capacity
Full Width
RF 3
Capacity
With PTS
RF 4
Capacity
Full Width
4 / 101
RF 5
Capacity
Full Width
5 / 127
RF 6
Capacity
Full Width
6 / 152
RF 7
Capacity
Full Width
7 / 178
RF 8
Capacity
Full Width
8 / 203
12 / 305 0.187 / 4.74 0.120  / 3.04 - - - - -
18 / 458 0.156 / 3.96 0.105 / 2.66 0.218 / 5.54 0.250 / 6.35 0.312 / 7.92 - -
24 / 610 0.125 / 2.17 0.080 /  2.03 0.187 / 4.75 0.250 / 6.35 0.281 / 7.14 0.375 / 9.53 0.420 / 10.67
30 / 762 0.090 / 2.28 0.060 /  1.52 0.156 / 3.96 0.218 / 5.54 0.250 / 6.35 0.343 / 8.71 0.390 / 9.91
36 / 915 0.060 / 1.52 0.035 /  0.88 0.125 / 3.18 0.187 / 4.75 0.218 / 5.54 0.312 / 7.92 0.343 / 8.71
42 / 1220 - - 0.094 / 2.39 0.156 / 3.96 0.187 / 4.75 0.281 / 7.14 0.312 / 7.92
48 / 1220 - - 0.063 / 1.60 0.125 / 3.18 0.156 / 3.96 0.250 / 6.35 0.281 / 7.14
54 / 1524 - - - 0.094 / 2.39 0.125 / 3.18 0.218 / 5.54 0.250 / 6.35
60 / 1524 - - - 0.063 / 1.60 0.094 / 2.39 0.187 / 4.75 0.218 / 5.54
66 / 1829 - - - - 0.094 / 2.39 0.156 / 3.96 0.187 / 4.75
72 / 1829 - - - - 0.094 / 2.39 0.156 / 3.96 0.187 / 4.75
Ratings are for mild steel.

4-Roll Servo Feed

Servo Feed4-roll servo feeds from Feed Lease can be a good choice when running wide, lighter gauge material. Since four rolls contact the material instead of two, the per-roll pressure can be reduced. For sensitive materials where not marking or stretching the material is critical, a 4-roll feed may be the best choice.

These feeds benefit from a few construction advantages worth noting:

  1. The upper feed rolls are trunion-mounted (i.e., rolls pivot rather than go straight up and down as with a slide block design). Trunion mounted upper rolls are the standard on heavy-duty two-roll feeds as they increase the mechanical advantage of the roll and maintain complete gear mesh at all times.
  2. Upper rolls work together or independently. Unlike some other 4-roll feeds, Feed Lease four-roll servo feeds allow all four feed rolls to work together or independently. This adds flexibility to the line.
  3. All standard features and options of 2-roll feeds are also available for 4 roll feeds. Discuss your application with a Feed Lease sales rep to determine if your application is best suited for a 4-roll feed.

                                                   

Air Feeds

Servo FeedAir feeds are a simple coil-feeding option best-suited to low volume operations. Feed Lease air feeds offer a high-strength, cast alloy gripper carriage; pilot release; outboard-mounted electrical controls and adjustable, double-acting air cushions. To simplify job set-up, hand wheel adjustment is provided for rapid stroke length adjustment.

Options include pull-thru straighteners and air saver cylinders. Feed Lease air feeds are also available in Dual Grip, Zig Zag and Double models.

Standard Equipment

  • Accurate to + .001”
  • Precision fabricated steel feed base
  • High strength cast alloy gripper carriage
  • Pilot pin release electrical circuit
  • Outboard-mounted electrical controls (no reaching over material)
  • Adjustable double-acting air cushion
  • Rapid stroke length adjustment by means of hand wheel
  • Two-roll rear entrance stock guide with entrance vertical guide side shield barrier safety guards
  • Noise control mufflers
  • Guide bar keeper plates industry-standard interchangeable precision parts
  • Mechanical numeric stroke length indicator (FL-4 and larger)
  • Adjustable stroke air saver cylinder (FL-4 and larger)
  • Right angle stroke adjustment by means of hand wheel (FL-4 and larger)

Bar Air Feeds

Bar Air Feeds

Servo Feed Feed Lease bar feeds can be used to handle round, rectangular, I-beam channel and other shaped bars. These feeds can also be designed as push-pull feeds for removing "skeletons" from press or for removing strip material from die. 

Specifications

Strokes Per Minute
Max Strokes Per Minute
Stroke Length
  Model FL 2 Model FL 2 1/2 Model FL 3 1/4 Model FL 4 Model FL 5 Model FL 6
6 110 90 80 70 60 40
12 90 70 60 55 45 30
18 70 50 50 40 30 20
24 50 40 40 35 25 18
30 35 30 30 30 20 15
36 25 25 25 20 15 12
Note: Feed stroke is 5/8 longer than chart indicates.
Stock Thickness
Max. Stock Thickness (Without Straightner / With Straightener)
Stroke Length
  Model FL 2 Model FL 2 1/2 Model FL 3 1/4 Model FL 4 Model FL 5 Model FL 6
6 .156 / .125 .187 / .156 .218 / .187 .340 / .312 .375 / .340 .375
12 .125 / .090 .156 / .125 .187 / .156 .312 / .250 .340 / .312 .375
18 .090 / .060 .125 / .090 .156 / .125 .250 / .180 .312 / .250 .375
24 .060 / .040 .090 / .060 .125 / .090 .200 / .150 .250 / .180 .312
30 .040 / .025 .060 / .030 .090 / .060 .170 / .120 .180 / .150 .250
36 - .045 / .025 .060 / .030 .120 / .070 .150 / .120 .187
Note: Material is 1 wider than chart indicates. FL 6 information shown with straightener only.

 

Here is a sneak peak at the Push-Pull Roll Feed System with integrated Scrap Chopper:

Push-Pull Roll Feed System with Scrap Chopper - Angle 1

Push-Pull Roll Feed System with Scrap Chopper - Angle 2

Push-Pull Roll Feed System with Scrap Chopper - Angle 3