If you run a small coffee business or love making homemade capsules, a coffee capsule filling machine is a game-changer. But let’s be real—machines can act up sometimes! From lopsided coffee amounts to leaky lids, these issues can slow you down. The good news? Most problems are easy to fix with simple checks and adjustments. Let’s break down the four most common issues and how to solve them, no fancy tools required.
1. Filling Weight Is All Over the Place
Ever open a capsule and find too much powder (messy!) or too little (weak coffee)? This is one of the most common headaches. The main culprits are uneven coffee grounds, wobbly feeding speed, or a filling nozzle that’s too high or low.
First, make sure your coffee powder is ground evenly—aim for a consistency like fine sand (200–300 μm, if you want to get specific). Lumpy or too-fine grounds can clog the machine or flow too fast. Next, check the feeding speed: use the machine’s control panel to slow down or speed up the auger (the spiral part that moves powder). A steady speed means steady filling. Finally, adjust the filling nozzle so it’s 1–2 mm above the capsule mouth. This small gap helps powder flow smoothly without overflow. Don’t forget to wipe out the feeding hopper every few uses—caked powder can mess up measurements too!
2. Leaky or Loose Capsule Seals
There’s nothing worse than a capsule that leaks coffee when you brew it. Leaks or loose lids usually happen because the sealing temperature/pressure is off, the gasket is worn out, or the lid isn’t aligned right.
For heat-seal machines (the most common type), tweak the temperature to 120–150°C (it depends on your lid material—check the lid package!). The pressure should be around 0.3–0.5 MPa. Test the seal by gently squeezing the capsule—if it doesn’t leak, you’re good. If the seal still feels loose, check the silicone gasket on the sealing device. If it’s cracked or old, replace it (you can buy replacements online easily). Also, make sure the lids line up perfectly with the capsule bodies—adjust the lid feeder if they’re misaligned.
3. Capsules Get Stuck in the Machine
Few things are more frustrating than a jammed machine. Capsules get stuck because they’re deformed, there’s debris in the channel, or the parts aren’t moving at the same speed.
Start by sorting your capsules before putting them in the machine—toss any bent or damaged ones. Then, turn off the machine and unplug it (safety first!). Use a soft brush to clean the conveying rail and filling channel—coffee powder residue or small debris often causes jams. Next, sync the speeds: the capsule feeder, filler, and sealer need to work together. If the filler is faster than the conveyor, capsules stack up and jam. Use the control panel to slow down the filler until everything moves smoothly.
4. Strange Noises or Shaking
Loud rattles or shaking mean something’s loose or dry. This is usually from loose bolts, unlubricated parts, or unbalanced rotating pieces.
Grab a wrench (a small one works!) and tighten any loose bolts on the machine frame, conveyor belt, or filling head—vibration can loosen them over time. Then, add food-grade lubricating oil to the bearings, gears, and sliding rails. Do this every 200 hours of use (set a reminder on your phone!). If the machine is still shaking, check the filling turntable—if it’s wobbly, adjust the counterweight or replace worn parts. Quiet, smooth operation is a sign your machine is happy!
Pro Tips for Happy Machine Operation:
- Clean the machine after every use—wipe down surfaces with a damp cloth and brush out residue.
- Use high-quality capsules and coffee powder—cheap materials cause more problems.
- Keep a small toolkit handy (wrench, brush, lubricant) for quick fixes.
Coffee capsule filling machines are designed to make your life easier—don’t let small issues stop you. With these simple fixes, you’ll keep your machine running smoothly and your coffee tasting great. Have another problem we didn’t cover? Contact us!
Publication Date: 11/14/2025
Category: Product Events
