BIGTREETECH Direct Upgrade MK8 CR10 Extruder Heatsink All Metal Hotend 3D Parts for CR10 Ender3 with MK8 Nozzle CR10 Heat Breaker

?Specification? Material: aluminum Suitable for the nozzle: MK8 nozzle Fit for filament: 2 * 4MM Compatible with: 100K NTC 3950 thermistors Compatible with: 6 * 20MM heater ?Friendly Reminder? Recommended setting of the cutting machine: retraction speed over 80 mm / s Retraction length 2.5-4 mm ?Compatible?: Compatible with CR-10S Compatible with CR-10S -S5 Compatible with CR-10S -S4 Compatible with CR-10 Compatible with CR-10 -MINI Compatible with CR-20 Compatible with CR-20 PRO Compatible with Ender2 Compatible with Ender3 Compatible with Ender3 PRO Compatible with TronXY X5S Compatible with Tevo Tornado Compatible with Alfawise U20 ?Recommended slicer setting?: retraction speed over 80MM/S retraction length 2.5-4MM If you are facing PLA clogging problem, please try the followings: 1. Increase the retraction speed. The speed may have being limited in the firmware try to change it. G-command "M203 E200". 2. Increase the extruder acceleration. Check your firmware settings. G-command "M201 E9000". 3. Reduce the retraction length. It depends on your machine setup. 4. Increase the nozzle temperature by 5-10 degrees. 5. Do not install the 2 screws for support the heatblcok like the stock hotend on the CR-10 printer. 6. Make sure that there is no gap between the heatsink and the heat breaker.