Creality CR Touch Auto Bed Leveling Sensor Kit for 3D Printer with Metal Push Pin for Ender 3/Ender 3 V2/Ender 3 Pro/3 Max/Ender 5 pro/CR-10 with 32 Bit V4.2.2/V4.2.7 Mainboard

The CR Touch is an auto-leveling sensor designed to enhance the 3D printing experience, particularly when paired with 3D printers like the Creality Ender series. Here's a review highlighting its key features and benefits:1. **Auto-Leveling Precision:** The CR Touch excels at its primary function—automatically leveling the 3D printer's build platform. It uses a precise probe to measure multiple points on the bed's surface, ensuring that the nozzle is always at the optimal height. This results in consistent first layers and improved print quality.2. **Easy Installation:** Installing the CR Touch is relatively straightforward, especially if you follow the manufacturer's instructions or community guides. It's compatible with a variety of 3D printers, including the Creality Ender series, making it a popular choice among users.3. **Compatibility:** This sensor is compatible with a wide range of 3D printing materials and can be used with both heated and non-heated beds. It's versatile and accommodates various printing requirements.4. **Reduced Calibration Efforts:** With the CR Touch, manual bed leveling becomes a thing of the past. This not only saves time but also eliminates the frustration of fine-tuning the bed level before every print.5. **Improved Print Adhesion:** Proper bed leveling enhances the initial layer adhesion, reducing the chances of print failures caused by warped or unlevel surfaces.6. **Reliability:** Users often report that the CR Touch is reliable and accurate. Once set up correctly, it consistently ensures a leveled bed, reducing the need for frequent adjustments.7. **Community Support:** The CR Touch benefits from an active and supportive community of users who share tips, settings, and troubleshooting advice. This can be invaluable for those new to auto-leveling systems.8. **Price:** While it's an additional expense, the CR Touch is generally considered a worthwhile investment due to the time and hassle it saves in the long run.9. **Longevity:** Many users have reported that the CR Touch is durable and has a long lifespan, making it a cost-effective choice over time.10. **Print Quality:** The auto-leveling provided by the CR Touch often results in improved print quality, especially for intricate and complex models. It helps prevent issues like uneven layers and adhesion problems.In conclusion, the CR Touch is a valuable addition to a 3D printer, offering precise auto-leveling capabilities that greatly improve the printing experience. While it comes at an extra cost, the time saved and the enhanced print quality make it a worthwhile investment for both beginners and experienced 3D printing enthusiasts.

I can verify that this is compatible with my Ender 3 V3 KE (even though it is not stated anywhere - they only list models that it can be added to, not models for which it is a compatible replacement part).It is a replacement for the CR touch sensor that I stupidly broke by leaving a large print on the bed and initiating Z Homing. This caused the pin on the initial sensor to bend and the machine startup tests would fail since it no longer passed it's test. Without that, it won't print!So, this is an identical part, just take the broken one off and replace it with this one.First i placed a magazine on the print bed - in case I dropped anything I didn't want it to scratch the hot plate.It's a little tricky unplugging the wire harness from the old one. I used a small flat-head screwdriver to gently work one side up and then the other until it popped off .. then there was still a little bit of glue that didn't want to let go ... I used a utility knife to carefully cut that, being sure to keep the blade pointed AWAY from the wires.After that .. nothing left to do - since it is a replacement, there is no need to go through modifying the firmware - that's stuff is already in place.I did take it through it's initial calibration steps again before printing.My printer went from dead to alive in just a few minutes <insert maniacal laugh>

TL;DR : Can be tricky to install if you are not experienced in working around electronics or modifying firmware. If you can follow the online instructions, it’s well worth adding to your Creality printer.Let’s acknowledge the 500 pound gorilla in the room : the installation of the CR touch is not hard, but it isn’t easy either. If you find the good tutorials on YouTube, study them and follow them to the letter this should be relatively easy to install as far as the mechanical engineering goes.Then there is the software engineering in the form of the firmware upgrade that must be installed to take advantage of the new hardware you just installed. I opted to run with the Creality firmware just to get up and running as quickly and easily as possible.*** NOTE *** This is not a true bed leveling device. It can only compensate to a limited degree for the bed not being leveled. You will still need to level your printer’s bed manually to a pretty precise level BEFORE running the bed leveling software. Think of this as a finishing touch rather than the be-all-end-all.I use a feeler gauge and manually move the print head to a rough 3x3 grid to start the bed leveling process *AFTER* installing the CR Touch, but *BEFORE* running the software leveling. Once I am satisfied the rough leveling is pretty good, then I throw out the rest of the instructions. I don’t care what, there WILL BE DIFFERENCES between cold leveling and normal printing temperatures leveling, and the stock instructions and firmware will do the leveling cold. I will only run the software once everything has been up to printing temperatures for at least 10 minutes. Trust me - this will pay huge dividends later.The other thing you can do as part of running the bed leveling software is to take time and several prints to dial in your z offset. Despite all my careful planning and instruction I found on YouTube and the internet in general, I found the best settings for my Ender 3 v2 were several hundreds off what should have been optimum. Once I used trial and error to discover that “sweet spot” I marveled at how much better my prints have been compared to before the CR Touch.This is especially true for “calibration” prints like Benchy or the CHEP cube. Since getting dialed in, I stand all amazed at how nearly flawless the Benchy prints have cranked out by the v2. Smooth as silk, and nearly no stringing at all. All other prints are leaps in quality better than before I installed the CR Touch.All in all, it is very much worth the cost to upgrade your Creality printer with a CR Touch.