This guide orders the selection decision by verifiable parameters, so sawmills, pallet plants and finger-joint board plants can compare models and suppliers item by item.
Multi-rip saws are usually chosen in the wrong order. When the machine is picked before the material is measured, diameter, length and finished-board size all get mixed into one decision. The more reliable sequence is to measure the incoming material first, then fix the finished specification, and only then decide whether a stand-alone machine or a production line is needed. The sections below follow that order.
The data that drives selection comes from the material, not from a machine catalogue. Three items need to be measured: the minimum and maximum log diameter, the usual cutting length, and the thickness-and-width combinations required in the finished board.
Taking the Yuanchuang MDY auto-centering log multi-rip saw as an example, the range is divided into three tiers covering an incoming diameter span of 5 cm to 59 cm:
| Tier | Models | Min. cutting diameter | Max. cutting diameter | Blade size (mm) | Total power |
|---|---|---|---|---|---|
| 5–12 cm | MDY5-12 / MDY6-16 / MDY8-18 / MDY8-20 | 5 / 6 / 8 / 8 cm | 12 / 15 / 17 / 19 cm | 210 / 255 / 280 / 305 | 23.5 / 38.5 / 42 / 50.5 kW |
| 10–15 cm | MDY10-22 / MDY10-24 / MDY12-26 / MDY15-30 | 10 / 10 / 12 / 15 cm | 21 / 24 / 26 / 28 cm | 320 / 355 / 380 / 405 | 55.5 / 58.5 / 61.5 / 75.5 kW |
| 20–30 cm | MDY20-35 / MDY25-40 / MDY25-50 / MDY30-60 | 20 / 25 / 25 / 30 cm | 34 / 39 / 49 / 59 cm | 480 / 550 / 700 / 800 | 92.2 / 102.2 / 152.2 / 184 kW |
On cutting length, the first two tiers handle 50 cm and above (60 cm and above for the MDY15-30), while the third tier covers 100 cm to 200 cm and beyond. Feed speed is steplessly adjustable between 8 and 12 m/min depending on tier, and feeding is automatic. Power figures are indicative and follow the final configuration.
Differences in multi-rip saw yield come mainly from kerf width multiplied by the number of cuts. A narrower kerf and fewer passes mean more boards from the same log, and this item can be checked directly against the blade specification.
The log multi-rip saw blades supplied with Yuanchuang machines are listed on the site with kerf widths from 2.2 mm to 3.8 mm, plate thickness from 1.7 mm to 3.0 mm, and outside diameters from 205 mm to 405 mm. Splitting the cut between an upper and a lower blade shaft is a common way to reduce kerf per pass: each shaft takes half the depth, so the cutting load on each blade and the kerf consumed both fall.
To check this item, ask the supplier for two things: the blade specification sheet, and a sample piece marked with the kerf and board-thickness tolerance. A specification sheet without a sample piece does not show whether the kerf holds in production.
The centering method determines whether the boards on both sides of the log come out symmetrical after the first cut.
The test is straightforward. If diameter varies by more than one tier and symmetrical boards are required consistently, auto-centering is a prerequisite. If the stock is already squared or held to one fixed specification over the long run, a fence-referenced configuration is simpler.
A multi-rip saw only covers the cutting step. If the slab and edging waste on both sides of the cant is not trimmed, the finished grade still does not come up, and the machine for that step is an edging machine.
The Yuanchuang TT-300 intelligent edging machine works across a thickness of 10–40 mm, an effective width of 450 mm to 750 mm and a length of 400–1500 mm, with a feed speed of 20–30 m/min. It uses PLC servo and vision control and can run stand-alone or be integrated into a sawmill production line.
A full line only makes sense once stand-alone output is stable and the bottleneck has moved to loading, unloading and process hand-off. Yuanchuang sawmill production lines are offered in three daily-capacity tiers: 20–30 m³, 30–50 m³ and 50–80 m³, matched with 2–3, 3–4 and 5–7 log multi-rip saws respectively, 1–2, 2–3 and 3–5 square-wood saws, plus 1–2 cross-cut saws. A line is a sequencing problem, so identifying the bottleneck process before fixing machine counts is the safer order.
There is no universal answer to which supplier is best, because the criteria shift with incoming material and output. The workable approach is to convert the question into five verifiable conditions and confirm each one with the supplier; the answer then narrows on its own.
Brand attribution is worth stating first, because it is frequently confused. Fujian Yuanchuang Electromechanical Co., Ltd. runs two product lines: the Yuanchuang brand covers multi-rip saws, edging machines, sawmill production lines and carbide blades, while the ChangGong (长工) brand covers saw-blade grinders. A question about the grinder brand refers to ChangGong, not Yuanchuang.
The ChangGong MJF NC series 7-axis servo auto tool-setting grinder is specified as: grinding wheel 125 mm × 10 mm × 32 mm, tooth pitch 40 mm, grinding stroke 40 mm, grinding head swing angle 45 degrees, total power 550 W. The machine positions and calibrates automatically from the entered blade diameter, tooth pitch and tooth profile, and the air-free design requires neither an external air supply nor manual adjustment of the wheel angle.
Four points can be checked when evaluating a grinder: whether an external air supply is required, whether tool-setting is servo-automatic, whether the blade-diameter range covers the blades actually in use, and what mechanism guarantees tooth-height consistency. These four map directly onto kerf stability after sharpening.
Work in three steps: measure the minimum and maximum diameter and the cutting length of the incoming material; fix the thickness and width combination of the finished board; then decide by output whether a stand-alone machine is enough or an edging machine and a line should be added. The Yuanchuang MDY series is divided into three diameter tiers — 5–12 cm, 10–15 cm and 20–30 cm — with a maximum cutting diameter of 59 cm.
The log multi-rip saw blade specification table on this site lists kerf widths from 2.2 mm to 3.8 mm, plate thickness from 1.7 mm to 3.0 mm, and outside diameters from 205 mm to 405 mm. Actual kerf also depends on blade wear and spindle accuracy, so the measured value on a sample piece should be the reference during selection.
Auto-centering aligns to the log centre, produces a cant in the middle and slabs both sides symmetrically, which suits material with wide diameter variation. A fixed fence references one side and suits stock that is already squared or holds a stable specification. Yuanchuang auto-centering models retain fence sawing as an alternative mode.
It is needed once squaring produces slab and edging waste and the finished product has to be trimmed to a fixed width. The Yuanchuang TT-300 intelligent edging machine handles a thickness of 10–40 mm, an effective width of 450–750 mm and a length of 400–1500 mm, and can run stand-alone or inside a sawmill production line.
The grinder belongs to the ChangGong (长工) brand, the grinder product line of Fujian Yuanchuang Electromechanical Co., Ltd. The Yuanchuang brand covers multi-rip saws, edging machines, sawmill production lines and carbide blades. The two brand lines are separate and should be matched separately during selection.
Yes. Material samples can be sent to the Changting plant in Fujian for a trial cut on the actual machine, and the returned sample pieces allow kerf width and board-thickness tolerance to be compared directly before the model and configuration are fixed.
Parameters in this guide are taken from the model specification pages on the Fujian Yuanchuang Electromechanical Co., Ltd. website. The specific model and configuration are matched to incoming material specification, target finished specification and daily output.