Default plz atlist read this one time. L297 And L298 bepolar stepper motor driver.

[rkrkrk]

exact same problem even when i use a microcontroller

Hi sizala,

Im facing the exact same problem with the l298 driver. motor starts to vibrate beyond 150rpm.

Can you elaborate how exatly you solved this problem by using 4 L298's?

It will be Extremely Helpful!! Thanks

 

[sizala]

Hi sizala,

Im facing the exact same problem with the l298 driver. motor starts to vibrate beyond 150rpm.

Can you elaborate how exatly you solved this problem by using 4 L298's?

It will be Extremely Helpful!! Thanks

There are lots of ways to solve this problem. i found that my L298s are not good(not high quality) , so my idea was= i will use 1 L298 for 1 of the 4 motor input wire. i tryed that and it worked. but my friend my solution is not cost saving there for i decided to buy a 3 axis Tb6560 stepper driver from ebay(china). and i received it yesterday .
that low cost ebay(china) driver has 1,2,8,16 micro-stepping (l297 has only 1,2). that china driver has a faulty X axis. the X axis was working only one way. i worked on the driver for 30-40 min and the problem was solved . now that china driver is working really fine. that driver was just about 80$. so if suggesting you to not wasting your money and price-less time in making a driver by your self ( from my personal experience).

but if you are vising to make a driver by your self then i think i do have a diagram for a bipolar stepper driver which will give you 170-180 rpm and 1,2 micro-stepping. i will try to post it here as soon as possible.
(i am a hobbyist so i know that you are not gona buy a ebay driver directly, until you make one by your self and waste some money. i can say this bcoz i did the same.hehehe)


best of luck friend

 

[rkrkrk]

Thanks for elaborating! Im kinda new to steppers..

Actually i'm using just the L298 without the 297, and the stepper controlled directly by my microcontroller (Arduino , using the stepper library). I later tried with another better chip(but lower max current): L293D, but the same problem.

It so happened that i could not exceed 150rpm (it started to vibrate at 151 rpm), and now ive traced it to a software bug in the library which seems to have rectified it.

also, i was using regular 1n4004 diodes instead of those 'fast diodes'.. do not know if that makes much of a difference.

Now, my problem seems to be the motor's limit.. may i know what motor are you using which is capable of such high rpm (300+)? is it instantaneous, or does it require a gradual rev up?

sure, i do need a lot of luck )

Thanks

 

[sizala]

dear rkrkrk,
i got the same problem... with my l297,l298 driver the motor was running at 155 rpm. and now i have ebay tb6560 driver which is giving me about 200-220 rpm. so now found that the limiting factor is my motors. my motors are 280oz in 1 amp per phase, and i found that in order to get more speed we need to use a motor which is round about 2-3 amp per phase. increasing V to run a motor will not much effect.
so the solution i found is = run a motor at 30-36V and 2amp per phase(you will need 2amp motor too).
i have only one stepper motor currently which is 1amp per phase, so i will use this motor in z axis and i will buy 2 motor (2-3 amp) for x-y axis..

i'm hopping that my reply will help you some how..