OKUMA LB3000 SLIDE REPAIR PART 3

Hi, I’m working on the X-axis of the Mazak LB3000. We identified an issue with this side of the slide, where the Y-axis impact caused a cracked binder. When I checked the alignment, I zeroed the slide on this rail and corner. However, as I move across to the other side, it’s about one and a half thousandths off, and this deviation gradually increases toward the front half of the slide, which is unusual. If the misalignment were consistent across the entire length, it would suggest a setup issue, but since it’s localized, we need to address the bottom half of the slide.

The main concern is the backside of the slide, where there’s noticeable scoring. This scoring could trap chips and debris if not fixed, so we’ll need to grind it out. Using an indicator, I measured a drop-off of about two thousandths with a larger needle, though a finer needle showed a more exaggerated four or five thousandths. Either way, this needs to be corrected. We’ll scrape the bottom of the slide and replace the gibs for the X-axis. The other binders may be reusable, but this side definitely requires rework.

We’ll also grind the binder to ensure proper alignment. To confirm the slide is parallel with the bedways, I’d need a straight edge, which I don’t have here. Once we move the slide to a table, I’ll indicate the alignment to verify it’s true to the bedways. Initially, I didn’t think the X-axis needed much work, but the scoring and misalignment mean we’ll need to grind and rework it, though not as extensively as originally planned.

We’ll put the slide on the way grinder first to true it up, then proceed from there. I’ll provide a parts list for what we need and share more updates in future videos. Stay tuned, and thanks for watching!