EUCHNER Handheld Operating Unit and Electronic Handwheel Field Troubleshooting Guide

Check if the enable circuit of the contactor or servo drive is connected in series with the emergency stop.

2.4 Selection switch (Gray code) and multiplication switch output are confused

Phenomenon: The axis selection switch is in the "X" position but moves the "Y" axis; The actual feed rate is incorrect when the magnification switch is in the "100%" position.

Reason:

Poor internal contact of the switch or detachment of solder joints on the printed board. The Gray code selection switch of EUCHNER (such as 097029~097034) adopts 22.5 ° positioning and outputs 4-bit binary encoding (DCBA). The coding table corresponding to different gears has been provided in the product drawings.

Wiring error: Output lines A, B, C, D are connected incorrectly to the input point of the controller.

The corresponding decoding table is not configured in the controller.

diagnosis:

Turn the selection switch to each gear, measure the common terminal voltage of A, B, C, and D with a multimeter, record the encoded value, and compare it with the drawing. If a gear encoding is incorrect or unstable, the internal contact of the switch is poor and the entire switch module needs to be replaced (knobs and switch bodies can be ordered separately).

Chapter 3: On site Replacement and Spare Parts Replacement Strategies

3.1 Replacement of cables and connectors

EUCHNER provides original cable components: 12 core, 23 core, 35 core spiral or direct connection cables with pre installed plugs. Replacement steps:

Turn off the power and remove the back cover of the handheld box (be careful with wiring).

Record the original cable core color and pin number (or take a photo).

For soldered plugs (such as 23 pins), use an electric soldering iron to remove the solder and disconnect the wires. The new cable should be welded according to the original definition, and attention should be paid to the single end grounding of the shielding layer (connected to the shell).

After reassembling, use a multimeter to test the key signals for on-off.

Confirm that the pins are not short circuited before power on testing.

If the original cable model has been discontinued, you can choose a universal spiral cable with the same number of cores and similar outer diameters, and purchase matching connectors separately (EUCHNER provides 23, 28, and 35 pin flange sockets and short-circuit plugs, with models such as 074384). When making homemade cables, it is necessary to ensure the coverage of the shielding layer and the bending resistance performance.

3.2 Replacement of Enable Switch

When the third level enable switch ZXE or ZSE fails (contactless switching or disappearance of clicking sound), you can order:

ZXE-091336:2 normally open contact, no clicking sound.

ZXE-104833:2 normally open contact with operation click sound (more suitable for tactile feedback).

ZSE2-2 C1692 (2NO+1NC) or ZSE2-4 C1943 (2NO+2NC) is used for HBL shell.

Attention: Replacing the enable switch requires disassembling and assembling the entire housing and internal printed circuit board. After soldering the 6 pins (or 4) of the old switch, clean the solder pads, insert the new switch, and solder it. After installation, a functional test must be conducted: press to the second position to confirm that the two normally open contacts are closed; Press excessively to the third position and confirm that the contact is disconnected; After release, the contact point should be disconnected when returning to the first position.

3.3 Replacement of Handwheel

Recommended replacement models for discontinued old models, attention points

HKB100S7A05 (RS422, 5V) HKB100S7A05K (with key function) or HKB100S7A12 (10-30V power supply) Pay attention to the power supply voltage and output type

HKD100S100G05 (push-pull 5V) HKD100S100G24 (push-pull 10-30V) G24 output signal amplitude is Ue-3V, need to confirm controller input level

HWA/T series (10 packages) HWA100T100A05/V10 can be used for Siemens systems

HWB series 5-pack HWB100T100G05/V05 suitable for Fanuc

Key steps:

Mark the positioning direction of the handwheel and panel before disassembly (usually the handwheel has a positioning pin hole).

The connecting cable between the handwheel and the control box (usually a 6-core flat cable) needs to be carefully plugged and locked with a buckle.

After replacing the handwheel, a direction test is required: clockwise rotation should generate a pulse of A phase leading B phase by 90 ° (according to the controller definition). If the direction is opposite, there are two solutions: ① Swap A with B (or A with/B); ② Reverse the direction of the handwheel in the numerical control parameters (such as Siemens setting MD32100).

The magnetic positioning handwheel does not require lubrication. If the mechanical positioning handwheel (HWA/HWB) feels rough, the positioning groove can be cleaned and lightly coated with low-temperature grease.

3.4 Emergency Stop and Selection Switch Replacement

Emergency stop button: 096298 for long models (for HBA/HBM shells without enabling windows); Short version (HBA HBE with enable window) with 106435; HBL uses 073985.

Blind hole cover plate (for sealing when emergency stop is not installed): 083653 (22mm aperture).