Alright, so I finally got my hands on one of those Sentro 40 knitting machines. Been seeing them everywhere, you know? Looked like a quick way to whip up some knitted stuff. So, I decided to dive in and give it a whirl. Here’s how it all went down, right from cracking open the box.

Unboxing and First Impressions
Pulling it out, the Sentro 40 felt… well, like a lot of plastic. Not a bad thing, necessarily, just what it is. It came with the machine itself, a few legs you gotta screw on, a crochet hook, some plastic needles, and a few little skeins of starter yarn. Honestly, the yarn felt a bit cheap, but hey, it’s for practice, right?
Setting it up was a piece of cake. The legs just push and click into place, or some versions have little suction cups. Mine had the screw-on kind, which was simple enough. The instructions were… okay. Lots of pictures, which helped, but some bits I had to read a couple of times. It also came with a tension fork, which is this little arm that the yarn threads through. Seemed important.
The Great Cast-On Battle
So, machine set up, yarn threaded through the tensioner and the guide. Time for the main event: casting on. The manual shows this zig-zag method, weaving the yarn in and out of the needles. My first attempt was a total disaster. Yarn everywhere, stitches dropping before I even got a full round. I think I re-did it about five times. I was getting a bit frustrated, not gonna lie.
I watched a couple of videos online – not from the manual, just general ones. That helped a bit to see it in action. The trick seemed to be keeping a very, very light tension on the yarn with my hand as I slowly cranked that handle for the first row. Slow and steady. Eventually, I got a row to stick! It was a small victory, let me tell you.
Getting into the Groove (Sort Of)
Once I got the hang of casting on (mostly), I started cranking. The machine has two modes: “T” for tubes (like for hats and socks) and “P” for flat panels (scarves, blanket pieces). I started with tubes, seemed easier.
The biggest learning curve for me was tension. That little tension fork thingy? Super important. And how you feed the yarn from your hand matters too. Too tight, and the machine jams or drops stitches. Too loose, and your knitting looks sloppy and uneven. I found a medium-weight, smooth yarn worked best to start. Nothing too fluffy or too thin, because those just caused headaches. I had one yarn that kept splitting, and that was a nightmare.
You also gotta be careful with the cranking speed. Go too fast, especially at the beginning, and you’re asking for trouble. A nice, even pace is key. And you need to keep an eye on those needles. Sometimes a stitch doesn’t quite catch, and if you don’t fix it right away with the crochet hook, it turns into a dropped stitch ladder real quick.
- Tip 1: Weight your project. As the knitting gets longer, it needs some gentle pull from underneath. I just used some clips with a bit of weight on them.
- Tip 2: Listen to the machine. You’ll start to hear when things aren’t quite right. A weird click or a crunch means stop and check!
Making Actual Things! (Well, Almost)
After a lot of practice swatches (which mostly looked a bit wonky), I finally managed to crank out a decent-looking tube! It wasn’t huge, maybe enough for a kid’s hat. But it was consistent, and all the stitches were there. That felt pretty good, I gotta say.

Then I tried the flat panel setting. You have to manually move the yarn around certain pegs at the end of each row. It’s a bit more fiddly than tubes, and you really have to pay attention. My first flat panel was… trapezoidal. Not exactly what I was going for. But again, practice. I learned you have to be super consistent with how you handle the yarn at the edges.
I’m currently working on making a simple beanie. Just a tube, then gather the top. It’s coming along! It’s definitely faster than hand knitting, once you get past the initial struggles.
So, What’s the Verdict?
Is the Sentro 40 a miracle machine? Nah. It’s a tool. It has a learning curve, and it can be finicky. You’re not going to be churning out perfect sweaters on day one. But is it fun? Yeah, actually, it is, once you get the hang of it.
I think it’s great for making simple things quickly – hats, scarves, leg warmers, maybe even simple pet sweaters. If you’re patient and willing to practice, it can be a cool addition to your craft tools. If you’re expecting professional, flawless results with zero effort, this probably isn’t for you. It’s more of a fun, hobbyist gadget.
I’m definitely going to keep playing with it. Maybe try some different yarns now that I’m a bit more confident. We’ll see what else I can crank out!