first of all, are you informed about the Rsense value on ur stepsticks?
with that value on hand, u need a voltmeter to "see" the Vsense ... and u need a small trimmer screwdriver
I_TripMax= Vref/(8*Rs) ---> for A4988
if ur Rsense = 0.05ohm
2.5 = v / (8x 0.05)
v = 2.5 x 8 x 0.05 = 1v
with some light fingers and a steady hand, adjust the mini trim pot so that it reads 1volt ref to ground. caution not to short anything, it is very easy to blow drivers crossing or shorting anything else.
if you do not have a voltmeter, you can use the finger sense method. grab the shaft, turn the trimmer till the shaft is lose to grip to the point, you can stop it with some force, the adjust it slowly till u can feel it over power your fingers. this is a very crude approximation method
but @ 2.5a, ur steppers/drivers will get v hot v fast. i did mod my steppers with heatsinks for that reason.
i did went 1 step further to see how well it performs its microstepping (like this xxx)
i just double side taped a long thingy to the pulley or shaft. if it does have irregular step sizes, you may then look at this for some solution, but its a mod @ SMD device level (mods)
i be interested to know if ur setup would produce even steps w/o mods ... u think u can post a vid?
cheers
Ohmarinus Wrote:
-------------------------------------------------------
> I received a new Sanguino board with new
> stepsticks. Working on everything now, currently
> stuck at the point of configuring my Stepsticks..
> Which I have no idea how to work the formula I
> found on the wiki.
>
> The steppermotors I use are:
>
> Manufacturer Wantai
> Holding Torque 4.8 kg/cm
> 47.1 N-cm
> As 5mm
> Voltage rating 3.1
> Stepping angle 1.8 degrees
> Current rating 2.5A
> Nr. of leads 4 (30 cm)
> Type 42BYGHW811
with that value on hand, u need a voltmeter to "see" the Vsense ... and u need a small trimmer screwdriver
I_TripMax= Vref/(8*Rs) ---> for A4988
if ur Rsense = 0.05ohm
2.5 = v / (8x 0.05)
v = 2.5 x 8 x 0.05 = 1v
with some light fingers and a steady hand, adjust the mini trim pot so that it reads 1volt ref to ground. caution not to short anything, it is very easy to blow drivers crossing or shorting anything else.
if you do not have a voltmeter, you can use the finger sense method. grab the shaft, turn the trimmer till the shaft is lose to grip to the point, you can stop it with some force, the adjust it slowly till u can feel it over power your fingers. this is a very crude approximation method
but @ 2.5a, ur steppers/drivers will get v hot v fast. i did mod my steppers with heatsinks for that reason.
i did went 1 step further to see how well it performs its microstepping (like this xxx)
i just double side taped a long thingy to the pulley or shaft. if it does have irregular step sizes, you may then look at this for some solution, but its a mod @ SMD device level (mods)
i be interested to know if ur setup would produce even steps w/o mods ... u think u can post a vid?
cheers
Ohmarinus Wrote:
-------------------------------------------------------
> I received a new Sanguino board with new
> stepsticks. Working on everything now, currently
> stuck at the point of configuring my Stepsticks..
> Which I have no idea how to work the formula I
> found on the wiki.
>
> The steppermotors I use are:
>
> Manufacturer Wantai
> Holding Torque 4.8 kg/cm
> 47.1 N-cm
> As 5mm
> Voltage rating 3.1
> Stepping angle 1.8 degrees
> Current rating 2.5A
> Nr. of leads 4 (30 cm)
> Type 42BYGHW811
