Welding Issues - particularly with Y notches - can have a number of root causes outside the Stuga Machine. This checklist identifies a number of potential root causes that have been regularly known to occur
Technical Bulletin
| TB Number: | 250 |
| Originator: | Gareth Green |
| Machine: | All |
| Date: | 03/04/14 |
| Circulate to: | Service |
| Title: | Welding Issues |
Symptoms
| Code | Description |
| Windows incorrect size / bowed / not parallel | |
| Weld not consistent top to bottom | |
| Poor finish on ovolo | |
| Dog leg on reverse butt weld | |
| V notches too deep | |
| Q-Cuts incorrect | |
| Incorrect parts / profile | |
| Coloured on White orientation incorrect | |
| Scrapes / damage to profile surface | |
| Weak welds | |
| Windows Ok from one welder, no good from another |
Actions / Checks
| Code | Description | Tick |
| Profile storage – temperature | ||
| Bowed profile | ||
| Profile width within tolerance | ||
| Saw blade blunt / damaged | ||
| V notch blade blunt / damaged | ||
| Cutter blunt | ||
| Check clamping / accuracy / alignment | ||
| Check office link has correct codes | ||
| Heater plate temperatures | ||
| Profile have concave / convex face | ||
| Setting plates out of square | ||
| Setting blocks | ||
| Welding pressure | ||
| Inexperienced operator on welder | ||
| General Welder setup – has it been serviced | ||
| Profile not square / twisted / not parallel / symmetrical | ||
| Burn off on reverse butt | ||
| Timing on reverse butt welder | ||
| Profile slipping in weld cycle | ||
| Backfence on welder not square | ||
| Teflon on heater plates not changed | ||
| Pulling pressure on corner cleaner | ||
| Check same window on all different welders, especially butt welders |
Draft
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