DIY CNC Homemade - Calibrate Stepper Driver A4988
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- Опубліковано 20 сер 2024
- DIY CNC Hecho en Casa - Calibrar Stepper Drivers A4988 - Ajustar Vref
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you are the best tunning maker
The best of all. Thanks.🏅🏅🏅🏅🏅
I don't know to calculate when using 1/16 micro step. Your video is full step.
for full step : multiply it by 70%
others : multiply it by 100%
Best example yet still don't know where the appropriate "Sense Resistor" value comes from for this calculation? Is it on that table or, missed, in the body of the text?
Great video. Really informative. Thanks for saving my project. :-)
Great vid. I have a board where the Vref doesn't change no matter what I do
I figured it out I had to measure on the Potentiometer leg. The pot was actually backwards as well. CCW to raise and CW to lower.
gracias
Gracias por tu video excelente, tengo un slo-syn SS250-1004 (22.5v / 0.61A / 225OZ.in) ya que esta por debajo del Amp de consumo lo puedo manejar con este pololu?? el asunto son los 22.5v puedo controlarlo con arduino MEga o que driver necesito??
Thank sir
my dvd stepper motor is rotating even when it's not connected to arduino (just 5v and GND)
sir why did you multiplied 0.7 in the equation
It is obtained from table 2 (min: 1.06)
Run the motor in full step, min 1:07
@@laborjag You have to divide through 0.7 though, you just transposed the equations wrong. It also makes way more sense to multiply because the 0.7 is basically about distributing the maximum current to the different coils, and the critical current is the current per coil. So as an extreme example, if you have two coils and you give each 50% of the current, it would even be ok to let the driver send 200% of the maximum current per coil to the motor.
true, there are two methods to set the current limit. One is using the fullStep 0.7 factor, the other way is to using Vref = Imax * 8 * Rcs. The equation in the video is little bit interpreted.
Are you working on the assumption that you will run the motor in full step?
it's correct, min 1:07
hey its Deepak
i have a nema 23 stepper motor (type:KH56KM2U001) 1.8Deg/step and 2AMPS and its a uni-polar we can change into bi-polar its not a problem
my problem is in this specification of stepper motor we can use A4988 stepper motor driver is it works and how to change microstep
vref=imax(8x0.1)x0.7 in this 0.7 its a full step i need 1/8 microstep how to change ????
vref=2.0x(8x0.1)x0.7 and on this 0.1 is driver A4988 in case we are using DRV8825 what is the value of it ?????
vref=1.12 and i calculated this stepper motor its a right answer ???????
RS 0.1 is the value of resistors in the driver A4988 (R100). Look the value of resistor in the DRV8825... There are 2 resitors...
for my specification Vref =0.672 even if i set it my stepper motor is turning 1/16 step only for completing one revolution i need to set 3200 steps to turn 1 revolution can anyone help what did i do wrong i have wrote a program to turn required no steps but it is stepping 1/16 stepping i am stuck right here can anyone help me i am using a4988 driver and nema 17 stepper motor
Get rid of those tree jumpers under the motor drivers
Hello friend,
I'm newbie
I have motor stepper nema 23 103h7124-1041 (sanyo denki) unipolar DC 3.25 amp, but i make to bipolar. I will wiring it to drv8825 with arduino shield v.3.
I used power supply 24v 20amp
My question is calculate Vref,
Imax=Vref*2
So Vref =Imax/2
Vref=1.625
Is it okay for drv8825?
Thanks you
quick answer is no, 8825 max at 2.2amp , go for 6600 driver. you want to overshoot since most of these cheap chinese products might not even make it to max. btw ur cal for vref looks correct.. and that chip wont handle 1.62. errr it can barely handle 1.10, get 3 or 4 6600 driver, if you going to stay with that motor, other option less the motor, geared it, serial style stepper(low amp ), cheapest route is the 6600 and keeping that motor after all its a sanyo..
Why does Rs suddenly change from 100 ohm to 0.1??
The 4 digit SMD resistor code R100 stands for 0.1 Ω
reacias