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Hi Kreutz
we go for order:
the function of the snubber is that to limit the transients produced by the motor winding when the driver commutes the polarity of the phase, correct ? :)
is...

:)
hi kreutz
not even I am not a seller of inductances.
however these occupy a lot of space on the pcb.

my idea is this:
is it possible to get the same effect of the inductances...

hi boys

this is my version of the UHU servo :) .
I call it hybrid UHU driver.
in fact I have founded on the original driver of Uli .
but the power section has been modified in accord...

hi all
accuracy of angle is in line with other commercial drivers,
the critical point of this drivers is that it it is necessary to use motor with good characteristics (old obsolete motors often...

A3986 ?
yes
si
da
er
él
A3986 !!!:)

hi all

courage boys !!! (group)
my configuration of card + motor also works well to 1/16 :) .
only problems the section of control phase - phase short-circuit protection :confused: .
that is...

I have doubts that its drivers can work fine.
the pcb layout doesn't seem me very in conformity with to how much prescribed by the Allegro.

1) any capacitors of suitable value on the line...

hi all
you think that a serious society as Allegromicro.
does itself have to publish the scheme of a demo board, puts it on line on a site that doesn't exist of fact?.
what studiotoyz is.com?,...

hi Steven
can you make the "schematic " or the pcb known layout that you have realized?.
however enough the schematic one!
I would like to see itself you have made the same error of so many...

hi all
yes ! the capacitor does *not* matter as long as it meets the minimum requirement !.

Allegro writes that it has to be "10 to 20 times Qc " therefore the value is not critical, and...

2,9 A is peack courrent !
4,93 V fase
2,2 - 2,8 N/m +/-
muy variable es :rolleyes:
hi

I confirm!
the closed loop is practically useless, if stepper motors are used.
however that system could be interesting as a further mean of recovery of possible errors owed to causes not...

hi all
external macro to Mach 3?
who is developing it? the same programmer of mach 3?
or furnished together with the suitable card?

if so pits, would be a good thing, for a finally...

this board is a FAKE !!
mach 2.3.4 not support "closed loop" , but suport encoders only in jog manual mode.
hi

hi
motor from 3 Amps?
we admit that they have a motor 2,8Amps , 260 oz = + / - 1,60 N/m "full step"
the motors are connected to the cnc meccanical ax through lead screw step 4mm TPN 14mm...

hi
how much amper do they absorb the motors?

43 v feeding > 63 V capacitor ok
microfarad = 2000uf * 1 Amper
in the s. drivers 1000 uf is good
hi

hi sdantonio
I live and job in Sicily (Messina)
ST.com (Catania) is my job: -)
stepper motors and drivers my passion

hi from italy (ciao da italia)

hi sdantonio
65 V is refered at chopper mode (pwm) !
looh at this board ...

bravo ragazzo :cheers: !!!
hi

hi all

la corrente che scorre in un avvolgimento dello statore di una fase motore é:
1) direttamente proporzionale alla tensione "Volt "
2) inversamente proporzionale alla resistenza di fase in...

hi ez-cnc
The causes that the buzzing of the motors provokes can be so many.
the first one among everybody is that the oscillator of the L297 resoning to a lower harmonica of the fundamental...

yes !!
unipolar 80 volts at 7-8 amps phase is good ?
I prepare the file for download in a time short
you post in my forum question end opinion please !


:cheers: happy Christmas and happy...

how the projects there are not in pdf?
the projects you find aloft them to the page in the box download :p
the files are. zip and they contain both the schemes and the pcb in formed. pdf
hi

Available for free , the complete projects of the totillos "TWH research" stepper motor drivers.
at

http://www.cnc-elettronica.it/

l297 + 298 end L297 + 6203 (4 Amps at 45 volts full/half...

him in fact!.
they are so great that doesn't serve a fan to cool the H bridges :-))
beautiful truth? :-))
hi

hi
all the drivers for bipolar steppers , they can manage the monopolar steppers , 6 or 8 wires.
the rare motors that have 5 wires, can be used only as monopolar .
hi
...

hi
him and true it doesn't make the microstepping.
but ago the half step with shape function.
and with motor from 200 steps and broadly enough is as fluidity of rotation that as resolution...

hi aminear
what problem did you have, with the signal of enable?
hi

h steve
look the
Over Voltage Lock Out ! only 30 volts max :rolleyes:

hi steve
the regulation of the tide that flows in an electric wrapping
it is a very delicate matter.
in particular way when it comes tall amperages.
the solution more adopted and that to...