Manual jog on a CNC
The pendant lets an operator move an axis by hand while watching the readout, without reaching into the machine.
Manual positioning · 25 / 100 PPR
Handwheel Encoders and Manual Pulse Generators (LE60 / LE80 / LERS T1469)
A graduated handwheel with a built-in encoder and a hand-held pendant, both at 25 or 100 pulses per revolution, for manual positioning on a machine that read
Model LE60 Handwheel · LE80 Handwheel · LERS T1469 Hand-Held Unit · Brand LE Raun · Category: Encoders & Draw-Wire
Resolution25 / 100 PPR
Bore50 mm
OutputC · E · F · T · L · A
Body60 / 90 mm
Overview
Not every axis needs a servo. On a manual mill, a printing-press compensator or a test stand, the operator turns a wheel and needs a number — and a handwheel encoder is the cheapest way to produce that number. The wheel is graduated so the eye can judge a partial turn, and the encoder behind it gives the counter an exact count.The LE60 and LE80 are 60 mm and 90 mm wheels on a 50 mm bore, so they replace the existing handwheel on a lead-screw end or a line shaft. The LERS T1469 is a free-standing unit at 134 × 69 mm, held in the hand like a pendant, for jogging an axis from the operator side of the machine.All three are offered at 25 or 100 pulses per revolution. The choice is the trade between speed and resolution: 100 PPR is finer, 25 PPR traverses four times faster for the same wrist movement. Output stages follow the rotary range — open collector, voltage, complementary, push-pull, 5 V line driver or 24 V line driver — so the handwheel can be wired to the same counter or PLC input as the axis encoder.
Application scenarios
Setup on a manual mill
A handwheel with an encoder turns a manual axis into a counted one for a DRO retrofit.
Print registration adjustment
A handwheel on the compensator roller gives the operator a calibrated correction instead of a guess.
Test-stand fine positioning
Approach a probe or a fixture by hand and read the exact travel on the counter.
Retrofit of an old machine
Adding a handwheel and a counter is cheaper than replacing the axis drive when the machine only needs a position display.
Industries
- Machine tools
- Printing
- Test and measurement
- Packaging
Technical specifications
| Models | LE60 Handwheel · LE80 Handwheel · LERS T1469 Hand-Held Unit |
|---|---|
| Outer dimension | 60 mm (LE60) · 80 mm (LE80) · 134 × 69 mm (LERS T1469) |
| Shaft bore / mounting | 50.8 mm bore (LE60) · 72 mm bore (LE80) · free-standing pendant (LERS T1469) |
| Pulses per revolution | 25 · 100 |
| Output stage | C open collector · E voltage · F complementary · L 5 V line driver (LE60 / LE80 handwheels) · LERS T1469 additionally T push-pull and A 24 V line driver |
| Resolution | Incremental 100–5000 ppr; absolute up to 17 bit single-turn / multi-turn |
| Output circuit | Push-pull, open collector, line driver (RS422), SSI or RS485 |
| Supply | 5–30 VDC (5 V for the line-driver versions) |
| Output frequency | 200 kHz (PNP: 100 kHz) |
| Protection | IP54 as standard, IP65 / IP68 for washdown and outdoor |
| Operating temperature | −20 … +70 °C |
Dimensions
| Item | Value |
|---|---|
| LE80 handwheel | Ø80 mm, 72 mm shaft bore |
| LEESTI469 pendant | 134 × 69 mm, free-standing |
| Pulses | 25 or 100 per revolution on both wheels |
The bore is the number that matters: 50.8 mm is 2 inch, so the LE60 drops straight onto a 2 inch shaft without a bushing, while the LE80 needs a 72 mm shaft or an adapter.
Wiring & output
| Lead | Colour (typical) |
|---|---|
| 0 V | Blue |
| A / A̅ | White / Green |
| B / B̅ | Yellow / Grey |
| Z / Z̅ | Pink / Red |
| Shield | — |
How to specify
- 01
Incremental or absolute
Incremental for speed, length and simple positioning where the controller homes on power-up. Absolute where the position must be known without a homing cycle — a rotary table, a lift, a valve actuator.
- 02
Set the resolution from the mechanics
Resolution = travel per revolution ÷ ppr. A 5 mm ball screw with a 2500 ppr encoder gives 2 µm per count before quadrature, 0.5 µm after — finer than the mechanics can hold.
- 03
Choose the output circuit
Open collector for a short cable into a PLC, push-pull for a few metres, line driver for long runs or high frequency, SSI/RS485 for absolute multiturn.
- 04
Fit the mechanics to the shaft
Clamp or hollow-shaft mounting removes the coupling and the alignment problem; a solid shaft needs a flexible coupling and a bracket with slotted holes.
Why this series
A dial to read and a count to trust
The wheel is graduated so the operator can judge a partial turn, and the encoder behind it gives the counter an exact number for the same movement.
25 or 100 pulses per revolution
100 PPR on a 5 mm-pitch screw is 0.05 mm per pulse — 0.0125 mm per count in four-times decoding. 25 PPR gives 0.2 mm per pulse but four times the traverse for the same wrist movement.
Six output stages
Open collector, voltage, complementary, push-pull and 5 V or 24 V line driver, so the handwheel can drive the same input card as the axis encoder.
Wheel or pendant
The LE60 and LE80 replace the existing handwheel on a shaft end; the LERS T1469 is held in the hand for jogging an axis from the operator side of the guard.
Questions
Is the handwheel an encoder or a switch?
It is an encoder with a wheel on the shaft: turning it produces a pulse train, and a counter or a CNC converts that into a position. There are no detents and no contacts to wear.
Why only 25 or 100 PPR?
Because a hand turn is slow and the resolution is set by the screw, not by the encoder. 100 PPR on a 5 mm screw is already finer than an operator can judge by eye, and a higher count would only make the number run away during a fast traverse.
Can it replace an existing MPG?
If the machine expects a differential A/B pair, order the L or A line-driver version; if it expects an open collector, order C. The mechanical fit — 50 mm bore — is the same for the LE60 and LE80.
Need a quotation for Handwheel Encoders?
Send your application details or the guard opening dimensions and we will specify the right model and configuration for your machine.