Zebra GK420d — Printing Labels

Overview

The Zebra GK420d handles 4x6 and 4x8 labels with ease when paired with LollipopWMS. This guide covers USB and network setups, default media settings, and template tips.

Connect it with carrier integrations such as UPS to confirm label compliance before peak days.

Prerequisites

• LollipopWMS workstation with driver access.
• USB-B cable or Ethernet adapter with static IP.
• Latest Zebra Setup Utilities or OS-level drivers.
• Sample label from the pack and ship workflow for testing.

Step-by-step (USB/Network)

USB install

1. Connect the printer via USB-B and power it on.
2. Install Zebra Setup Utilities, choose GK420d, and set media to direct thermal.
3. Print a test label from LollipopWMS; confirm darkness and speed settings.

Network install

1. Attach Ethernet and hold the feed button until the network config label prints.
2. Assign the printer a static IP in the same subnet as the workstation.
3. Add the printer in LollipopWMS using the IP and port 9100, then print a live batch label.

Common ZPL snippets

Use these starters to adjust layout without rebuilding templates.

^XA
^PW812
^LL1219
^FO40,40^A0N,60,60^FDOrder: ^FS
^FO40,120^BY2,2,90^BCN,120,Y,N,N
^FD${ORDER_NUMBER}^FS
^FO40,280^A0N,40,40^FDShip To:^FS
^FO40,340^FD${SHIP_TO_NAME}^FS
^XZ

^XA
^FX Additional reference text line
^FO40,420^A0N,30,30^FDPick Wave: ${BATCH_ID}^FS
^FO40,470^A0N,30,30^FDSku Count: ${SKU_COUNT}^FS
^XZ

Troubleshooting

• Blank labels usually mean media type is set to thermal transfer; switch to direct thermal.
• Streaking indicates worn printheads; clean with isopropyl wipes and recalibrate.
• Skipped labels resolve by holding feed for two flashes to run an auto-calibration.