BQ198
Equipment series · BQ198
The BQ198 is an automatic warp knotter that ties the incoming warp to the old one on a mobile frame, away from the loom. The maker rates it at up to 600 knots per minute with stepless rotary speed control, and builds frames from 1 m to 4 m wide. Four versions cover a standard lease, unleased warps, a combination of leased and unleased sheets, and double knots for filament such as nylon. For a quote, send the lease drawing of both warp sheets, the knot you need, yarn samples and the frame width.
Manufacturer: Zhuji Boqiu Textile Machinery Co., Ltd.
- Knotting rate
- Up to 600 knots/min
- Speed control
- Rotary, stepless
- Frame widths
- 1–4 m, by version
- Standard lease
- Cam-controlled 1:1
- Type 10 lease unit
- Repeats from 1:1 up to 4:4, or irregular
- Printed yarn range
- 2S–200S and 20D–3000D
Published specifications
Values below come from the maintained catalogue record. The guide review date does not renew an earlier specification: read the dated source notes and confirm a current, matched configuration before comparing products.
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| Parameter | Published value |
|---|---|
| Stated maximum knotting rate | 600 knots/min |
| Knot types | Single and double; configuration dependent |
| Standard lease arrangement | 1:1 |
The four BQ198 versions
Boqiu splits the BQ198 model page into four tabs, and each tab carries its own data. An offer that only says BQ198 could mean any of them. Name the version on the order and attach its tab data. [1]
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| Version on the model page | What sets it apart | What your offer should state |
|---|---|---|
| Automatic warp knotter | Cam lease at 1:1 as standard; optional type 10 unit for regular repeats from 1:1 through 4:4, or an irregular one; single or double knot by switch | The lease mechanism fitted, the knot options and how they are adjusted. |
| Unleased warp knotter | Ties warps with no lease; the image prints 2S–200S while the text beside it gives 2–160 | One agreed count range, with the meaning of S spelled out. |
| Unleased / leased warp knotter | Both sheets leased, neither leased, or just one of them | The upper and lower arrangement you will run, shown on the machine. |
| Double-knot warp knotter | Aimed at filament such as nylon, where single knots can slip open | Knot security and passage through the loom on your chosen yarn. |
Published figures and what to ask about each
Several figures appear only in the specification images, not in the page text. The widest frame, the full yarn range and top speed are each listed on their own. Ask Boqiu which of them it will hold together on your warp.
The counts are printed with S and D. Ask which count system the S figure uses before you compare it with your own Ne or Nm yarn data. [1]
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| Item | Published value | What to ask for |
|---|---|---|
| Working method | Mobile frame; tying is done outside the loom | A layout drawing of the frame and beam in your weaving room. |
| Working width | 1 m–4 m across different versions | The width of the frame you are buying, and whether it adjusts. |
| Rate | Maximum 600 knots/min | The speed for your yarn; setup, stops, fixes and loom restart come on top. |
| Speed setting | Rotary stepless control | The agreed setting for your yarn and lease. |
| Yarn range: general, mixed-lease and double-knot tabs | 2S–200S and 20D–3000D | The meaning of S and the range that applies to the version you order. |
| Yarn range: unleased tab | 2S–200S | A D range for this tab, and one count figure in place of the two printed. |
| Motor line | 100 W × 36 V × 5 A × 18,000 r/min; DC motor | The motor nameplate and a wiring and supply sheet. The printed line mixes ratings and gives no mains figure for your plant. |
| Manual operation | Described for tying a few test knots | Boqiu's setup procedure and safety instructions. |
| Stopping | Wording about one-to-six automatic stops and slow stop and restart | The trigger, what is counted and which faults stop the head. The BQ188 empty-knot stop is a separate feature. |
Draw both warp sheets before choosing a lease mode
Boqiu's lease diagram shows four cases. Neither the upper nor the lower sheet is leased, both are, the upper is unleased while the lower is leased, or the reverse. Upper and lower describe the frame. Old and new describe your warps. Decide which warp goes where on the supplied frame before you choose.
The standard cam unit ties a 1:1 repeat, so check that your warp follows it. For 2:2, 3:3, 4:4 or an irregular repeat, ask for the type 10 unit to be quoted as a separate line, together with an illustrated guide to setting the repeat.
Send the warp sequence, the lease drawing, the total number of ends, the working width and any special selvedge or colour order. Ask Boqiu to show how the end order holds at the start of the sheet, across its width and after a stop. [1]
A tight knot also has to clear the loom
On the general tab, Boqiu describes independent yarn clamps, needle positions that move for the yarn and clamping pressure set to yarn thickness. It lists cotton, wool, silk, filament, textured and elastic yarn as suitable. Your own construction and finish are what count, so test them.
The page shows a single knot A and a double knot B. A double knot helps with yarn that tends to come undone. You still need to look at knot size and tail length, and at how the knot runs through your drop wires, heddles and reed once weaving starts again. Boqiu publishes no knot-strength or fault-rate figures, so agree a test with them.
Bring samples of both the old and the incoming yarn, covering differences in count, finish, twist, stretch and condition. Ask for the trial on the hardest yarn in your range. [1]
Accept the machine on a full warp change
Buyer acceptance steps
These steps are a suggested acceptance plan for buyers. Nobody from the site has run a BQ198 or timed a warp change on one. Run the trial on your own warp and keep every result with its conditions. [1]
Label the job
Mark the old and new sheets with end count, width, material, count system and the lease pattern.
Record the machine
Note the frame size, the exact version, the lease unit and the knot selected.
Time the setup
Clock frame setup and warp preparation apart from the knotting run, and write down the settings that worked.
Run and count
Log speed, ends tied, stops, missed or doubled picks and the time spent putting them right, using terms agreed beforehand.
Check the loom path
Look at the knots and tails, then pass them through the loom and restart under Boqiu's safe operating steps.
Judge the result
Record the time until good fabric comes off the loom, the faults left and how often the operator stepped in. Keep the samples and the pass limits.
Frame, parts and handover
Ask for an installation drawing that shows the room needed around the beam and the mobile frame, the working height, the shipping size and where the frame is parked between jobs. The 1–4 m width range gives none of these.
Request a full supply list: frame, knotting head, lease parts, the electrical supply and adapters, manuals and a first set of wear parts. Have needles, clamps and other service items named for the version you are buying rather than shown on a general photograph.
Boqiu promotes the BQ198 for short downtime and broad yarn coverage. To judge payback, compare a full accepted warp change with the way your mill does it now, using your own labour, downtime and repair figures. Price, lead time, training and warranty come from a current offer. [1]
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Sources & limitations
Have Boqiu confirm in writing, before you order, which version you will receive and whether the type 10 unit is included, one count range with the meaning of S for that version, the motor nameplate and supply data in place of the combined printed line, and the knot quality and warp-change time you will accept after your own trial.
BQ198 model page: four version tabs, specification images and knot and lease diagrams
Zhuji Boqiu Textile Machinery · Undated; accessed 11 October 2026
Data for each of the four versions, the specification images with frame widths, motor line and yarn counts, and drawings of the two knots and four lease arrangements.
Each source above lists its publisher and the date it was checked. Editorial method · Report an outdated detail