Jogging (Inch Control)

Run a motor only while a button is held, by deliberately defeating the seal-in so each press is a momentary burst.

What you’re building

Steps

1. Build a working start/stop first

   Build the normal start/stop/seal-in circuit: Power Source, Push Button NC (Stop), Push Button NO (Start), Coil M, NO Contact M (seal-in), Contactor M, Motor. Get it sealing in before adding the jog.

2. Add the two-block Jog button

   Add a Push Button two-block (NO+NC). This is one physical button with two contact blocks that move together: pressing it closes its NO block and opens its NC block at the same instant. Start is a separate button — Jog is its own button. In the diagram above, the dashed line links the two JOG blocks to show they are the same button.

3. Wire the Jog NO block to energize the coil

   Run a parallel path (alongside Start) through the jog’s NO block to the coil. Pressing Jog energizes the coil directly.

   Stop (right) → Jog NO block (left)

   Jog NO block (right) → Coil A1

4. Route the seal-in through the Jog NC block

   Put the jog’s NC block in series with the seal-in contact. Now pressing Jog opens the holding path, so the coil can’t latch while you jog.

   M seal-in NO Contact → Jog NC block (left)

   Jog NC block (right) → continue to coil side

5. Energize and compare

   Click Energize. Tap Start: the motor latches and keeps running. Press and HOLD Jog: the motor runs only while held — release and it stops instantly, because the jog’s NC block kept the seal-in from latching.