# Extruder Run Current **URL:** \ **Category:** General Discussion\ **Created:** [September 13, 2024, 10:05pm UTC](https://klipper.discourse.group/t/extruder-run-current/18797 "2024-09-13T22:05:36Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![zeshi](https://avatars.discourse-cdn.com/v4/letter/z/ee7513/32.png) [@zeshi](https://klipper.discourse.group/u/zeshi)\ **Post date:** [September 13, 2024, 10:05pm UTC](https://klipper.discourse.group/t/extruder-run-current/18797/1 "2024-09-13T22:05:36Z")
### Basic Information: Printer Model: Anycubic Kobra MCU / Printerboard: SKR 3 EZ Host / SBC: Pi4 klippy.log I have a Kobra (standard) that I installed and SKR 3 EZ on. If I set run current under the Extruder, the stepper will not successfully turn. If I uncomment run current, it will turn no issues, but then I’m faced with heat creep through the stepper and causing extrusion issues. 0.7 is the correct current for the stepper, but I’m at a lost as to why it won’t turn when set. The other steppers are working no issues at .4 current. The extruder is stock, a titan clone. 3:1 gear ratio. [klippy.log](https://klipper.discourse.group/uploads/short-url/3HXCQ73YyawYW2gfqsQ2yNZgEwY.log) (3.4 MB) ---
**Author:** ![zeshi](https://avatars.discourse-cdn.com/v4/letter/z/ee7513/32.png) [@zeshi](https://klipper.discourse.group/u/zeshi)\ **Post date:** [September 16, 2024, 8:10pm UTC](https://klipper.discourse.group/t/extruder-run-current/18797/2 "2024-09-16T20:10:38Z")
Update, tried a different stepper and a stepper driver. Still having issues and I’m at a complete lost, anyone have any suggestions? ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [September 16, 2024, 8:48pm UTC](https://klipper.discourse.group/t/extruder-run-current/18797/3 "2024-09-16T20:48:22Z")
Hello @zeshi ! 0.4A for the movement steppers is quite low. Prepare for skipping. You go better with 0.7A with those. For the extruder 0.7A should be sufficient with the gear. > [@zeshi](#): > > but then I’m faced with heat creep This is more an issue with heat brake cooling and over extensive retracting. Also keep in mind that the TMC2209 drivers need proper cooling. ---
**Author:** ![zeshi](https://avatars.discourse-cdn.com/v4/letter/z/ee7513/32.png) [@zeshi](https://klipper.discourse.group/u/zeshi)\ **Post date:** [September 16, 2024, 9:05pm UTC](https://klipper.discourse.group/t/extruder-run-current/18797/4 "2024-09-16T21:05:44Z")
I do have the SKR in an enclosure with an 80mm Noctua fan for cooling. The extruder even at .7A continues to do the same thing, will not extrude at all. ---
**Author:** ![zeshi](https://avatars.discourse-cdn.com/v4/letter/z/ee7513/32.png) [@zeshi](https://klipper.discourse.group/u/zeshi)\ **Post date:** [September 23, 2024, 8:47am UTC](https://klipper.discourse.group/t/extruder-run-current/18797/5 "2024-09-23T08:47:06Z")
Switched out the pancake stepper (22mm) with a 38mm and have 0 issues with extrusion. The moment I put the 22mm stepper, it will not produce enough torque to extrude. The stock Anycubic board uses a TMC2208 vs the EZ2209 I’m currently using. That’s the only discernable difference I can see between the two set ups. Would there be a reason to have different settings of some sort with the EZ2209 to accomplish the same results!?!? ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [November 22, 2024, 8:47am UTC](https://klipper.discourse.group/t/extruder-run-current/18797/6 "2024-11-22T08:47:51Z")
Closed on November 22, 2024, 8:47am UTC This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.