3D Printer Stepper Driver VREF Adjustment Made Simple!
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- Опубліковано 11 вер 2024
- In this step-by-step tutorial, I walk you through the process of tuning the stepper driver Vref for your 3D printer, focusing specifically on the TMC2208/2209 stepper drivers running in standalone mode.
We start by accessing the printer's motherboard to find the Rsense (resistor) value, along with optionally checking which drivers the board has. This essential initial step ensures we have the right information to proceed.
Next, I guide you through looking up the current rating of each stepper motor. In my case, the Extruder and Y axis feature the Creality 42-40 motor, while the X and Z axis are equipped with the Creality 42-34 motor.
Once we have all the necessary data, I show you how to perform the Vref tuning using a multimeter, screwdriver, and alligator clip. This crucial adjustment ensures optimal motor performance, reducing the risk of overheating or missed steps.
By the end of the video, you'll have the confidence and knowledge to fine-tune your 3D printer's stepper drivers, enhancing its overall performance and precision.
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VREF Calculator: printpractical...
Links:
Electric Screwdriver: amzn.to/3XA2qrv
Pretty cool. I like the technique of checking voltage difference while adjusting the trim pot
Thanks for watching!
Thanks that's easy to follow, can you also the result before and after tuning 🤔
if you have 2 steppers on the same driver how would you adjust the formula? i.e if you had 2 steppers that can handle 1A each and they are in parallel would you use 1A or 2A since the driver needs to provide 1A each. thanks..
Thanks, the clearest video online and nice to backup my other evidence. Why Creality puts these motors at different amp ratings on each listing. They list the 42-40 as 1.5A sometimes too... maybe that's peak.. who knows.
Does your calculator account for any margins? Say 10-20% as I often see recommended?
I believe the standalone TMC drivers are the weakest link anyway?
My Ender 5 Pro silent 4.2.2 TMC2208 150 r sense board arrived as:
E 1.4v
Z 1.19
Y 1.39
X 1.19
(X and Z motor got pretty warm with these values)
If it helps:
0.796v y measured when was skipping
0.56v X skipped big time.
Z I made 0.58v, no issues as it hardly moves at all. Now cold.
E: now testing 1.1v to avoid any overcurrent situations with LA on.
I'm using this vid to setup a TMC2208 driver for a stand alone stepper project (Not on a printer). Would my Rsense just be 0? (considering there is no resister being applied?)
Thanks! What about when using a standalone 2209 without any rense? Simply set rsense to 0 on that calculator?
You have to look at the resistor on the motherboard near the stepper driver to find your proper RSense value. I should explain this in the video, but can’t remember. If I don’t explain it let me know.
@@PrintPractical Thanks👍🏻
@@PrintPracticalso I’m following this for my CR10S Pro V2 with the creality v2.4 board looks like it has an rsense of 150 and 2208 stepper motors and I’m going to be installing an Orbiter v2 with the LDO motor rated at 1.2A, after setting this, is there any way to check to verify that it is within range at the motor while it’s running? Using your calculator I need to set it to 1.33v? By the way thank you so much I could t really find anything this detailed in a video!
I think you have something off in your vref calculation. I may be wrong but I think vref = 1.385*Imax.
Hello, Print Practical
I want to replace the Y-Axis 42-34 stepper motor on my Ender 3 Pro with a 42-40 stepper. The stock motor gets pretty hot and all of a sudden, it stops working, it just jerks and not rotate.
So do you advise I replace with a 42-40 stepper and set the Vref to the same voltage as the Extruder motor ??
I'm not really good with all the Voltage calculations.
And it uses the HR4988 motor driver.
Hi,
Weird, possibly a bad motor. You can try to replace it with a 42-40, I can’t guarantee that changing the Vref to the same as the extruder is the right way to do it, but makes sense to me. I tried to look at the datasheet for you for calculating the proper value, but it’s all in Chinese.
u might have a lose wire to the stepper i had it once
Are those stepper motor current levels peak current or RMS?
Why/how is it safe to use a metal screwdriver in this case? Other tutorials have mentioned using a ceramic-tipped screwdriver. Just curious?
Just be careful not to short anything...
try improving audio quality cause it's horrible rn
✨ "promo sm"