‹ AWithZ Academy
HD2 course
Digital display, instant welds
Hands-on & reviews3 lessons
![[Operation guide] HD2 handheld dual-pulse spot w](https://cdn.awithz.com/assets/_derived/w480/community/works/d122/cover.webp?v=b40fba12.q82)
Builds & projects0 lessons
Builds & projects0 lessons
Know-how0 lessons
FAQHD2
No weld after power-on, or welds turn black — what to do?
First make sure the pins are pressed firmly and the surface is clean; start low and step up — 0.1–0.15mm Ni-plated steel usually needs only a low-to-mid level. Look up settings by cell model × material in the WeldWorld parameter lookup.
How often do I change the pins, and how?
Pins are consumables — dress or replace them when welds enlarge, spark often or blacken noticeably; see the manual's pin-change section and the Academy videos for steps.
How do I store it long-term?
For lithium models, top up to 50–80% every three months; avoid heat and long-term storage at full charge.
Anything unclear in this course?
Tell us which step or which model is missing and we will add lessons.