We logged a consistent +1.8% length overrun on a JD 1270G in Klamath last week after a storm, likely from feed-wheel slip, and it pushed bucking out of spec and jammed our truck tallies. For those running similar setups, how often are you doing in-shift length/diameter checks in wet conditions, and does the lost cutting time pay back in better scale accuracy and fewer reloads?
, wet Pondo will do that — we saw +1.6–2% on a 1270G after a squall outside Klamath too; > our truck tallies. For those running similar setups, how often are you doing in-shift length/diameter checks Agree on the timing — 3‑stem check at start, then every 60–90 minutes or right after a downpour; it costs about 5 minutes but pays back by avoiding a reload and the tallies mess. We also bump feed‑wheel pressure 5–8% and tick up slip/length compensation until the bark roughs back up, plus a quick wipe on the measuring wheel when pitch builds; caveat: too much pressure scars wood and can skew diameter, so nudge, don’t crank — are you on aggress.
We saw the same on a 1270G H415; the fix was to “bump the length wheel pressure 5–10%” and run a 3‑piece check every 60–90 minutes in rain — about 8–12 minutes lost per shift, but it usually saved us a reload. Just don’t crank it too far or you’ll scuff bark; pair with a small knife‑pressure bump and keep the wheel clean, otherwise it’s like measuring a fish with wet hands. Do you have TimberMatic’s length correction/slip comp enabled to drop a temporary +1–2% offset during storms?
, that “+1.8% after the storm” screams the length wheel riding on pitch/mud; on our 1270G we knock it back by blowing off the wheel and encoder at breaks, dropping feed speed one notch on slick stems, and snugging the knives a touch — @eliza_c92’s pressure tweak helps but cleanliness and speed control did more for us. Instead of fixed-interval checks, we run a quick 2‑piece tape check whenever overrun creeps past about 1% or rain intensity jumps, then set a small temporary negative length correction so truck tallies stay in spec.
@tony_woods72 cleaning helps, but I’d add a temporary +2% slip correction in StanForD after a squall and soften the initial feed ramp so the first meter doesn’t skate. Event-based checks worked better for us than a clock — 2-piece at shift start and whenever the rain intensity shifts kept a +1.8% overrun on a 1270G near Klamath under 0.5% with minimal lost time, and it saved us a reload.