6 Colors High Speed Flexo Printing Machine With Double Rewinding

Q: What technical support does your company provide?

We provide multiple technical support channels, including phone, online chat, and expatriate personnel. You can find all the information about technical support on our website. We are committed to providing our customers with the best support services and ensuring that all questions receive timely and professional responses.

Q: My 6 Colors High Speed Flexo Printing Machine With Double Rewinding produces uneven ink density across the web width. Why?

Uneven density on a 6 Colors High Speed Flexo Printing Machine With Double Rewinding is often due to worn anilox rollers (cells clogged or damaged in the middle vs. edges), incorrect nip pressure between plate and impression cylinder, or deflection of the print cylinder at high speed. Measure the anilox roller with a microscope – if cell volume varies >10%, replace it. Check that the impression pressure is equal left to right using a pressure gauge strip. Also, consider a crown‑ground impression cylinder to compensate for deflection. Fixing these gives uniform solid coverage and fine text across 800 mm web width.

Q: How do I calibrate the print repeat length on a 6 Colors High Speed Flexo Printing Machine With Double Rewinding for different die‑cutting jobs?

On a 6 Colors High Speed Flexo Printing Machine With Double Rewinding, repeat length is controlled by the gear ratio between the print cylinder and the main drive. For a new job, first measure the exact circumference of the mounted plate cylinder (including tape and plate thickness). Then set the electronic line shaft or mechanical gearbox to match the repeat length required (e.g., 400 mm). Run a test print and measure the distance between four registration marks. Adjust using the "repeat trim" function in 0.1 mm increments. For servo‑driven presses, you can store up to 200 repeat presets. Calibration errors >0.5 mm will cause waste when combined with a rotary die cutter.

Q: What causes banding or "barber pole" streaks across the print on a 6 Colors High Speed Flexo Printing Machine With Double Rewinding?

Banding on a 6 Colors High Speed Flexo Printing Machine With Double Rewinding appears as diagonal or horizontal stripes and usually points to a damaged anilox roller bearing, a bent plate cylinder shaft, or uneven doctor blade pressure. First, run the press with the chamber removed and observe the anilox roller surface – any visible wobble indicates bearing failure. Remove the plate cylinder and roll it on a flat surface; if it wobbles, replace it. Also check that the doctor blade is clamped evenly – tighten from center outward. A simple fix: clean the anilox with a copper brush to remove dried ink that can cause hydraulic pressure variations. Banding ruins customer confidence, so inspect weekly.

Q: Can I retrofit a used 6 Colors High Speed Flexo Printing Machine With Double Rewinding with servo drives for better register?

Yes, retrofitting an older 6 Colors High Speed Flexo Printing Machine With Double Rewinding with independent servo motors on each print station and a master PLC is technically feasible. It improves register accuracy from ±0.3 mm to ±0.05 mm and reduces setup time by 70%. However, the cost ($25k–$40k) may approach half of a new entry‑level machine. Also ensure the frame and bearings can handle higher acceleration. Many retrofit kits include touchscreen control and automatic tension feedback. If your press is less than 10 years old, the upgrade is worthwhile; otherwise, consider trading in for a factory‑servo model.