Hardware for 24V 2.5A Stepper Motors I'm thoroughly confused and could use some guidance. I have a hardware setup that I'm going to repurpose. It is very nice and I don't want to swap out motors. There are 3 stepper motors for XYZ motion that are 24V and 2.5A. I have not built the stepper/extruder yet, but there will probably be only one. Can someone please help me spec out a control board that will give me the most options, control, expansion, ease of configuration. Bonus requirements: heated chamber control (24V, I think), DC motor/encoder control (I have a very nice motor/encoder extruder setup that would be nice to repurpose). Custom LCD display (existing basic lcd screen on front of machine). If you guys can throw some ideas or reference material to help me out, that would be great. I would rather customize software/firmware rather than customizing hardware. I'm confused with what challenges are going to be in front of me if I go with something like a DUE with RAMPS-FD and some DVR8825 drivers. Thanks for any help you can throw my way. Cheers. https://reprap.org/forum/read.php?1,435426,435426#msg-435426 Wed, 15 Jul 2026 12:18:25 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,435426,438265#msg-438265 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,438265#msg-438265 arthurwolf General Sun, 30 Nov 2014 06:37:16 -0500 https://reprap.org/forum/read.php?1,435426,436352#msg-436352 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,436352#msg-436352 Paul Wanamaker General Tue, 25 Nov 2014 00:29:59 -0500 https://reprap.org/forum/read.php?1,435426,436330#msg-436330 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,436330#msg-436330 Are you CNC milling titanium with 1" depth cuts?

Not much current required
to push/pull an extruder around?
or
Squirt ABS out of extruder?

:S]]> cozmicray General Mon, 24 Nov 2014 22:11:57 -0500 https://reprap.org/forum/read.php?1,435426,435957#msg-435957 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435957#msg-435957 When it's near its max it will overheat, and it's thermal protection will cut the voltage until it cools off. In my experience for about a second. This is a possible source of lost steps.
If you run drivers rated at 2A with 2.5A motors, you are just not going to go over 2A, and will not get the max torque from the motors, but the motors will be just fine.

Edit:
It will have less holding power, but it's the voltage that determines the max speed.

Edit:
FYI: The Azteeg X5 is based on Smoothie, and has 8825 drivers.
According to this wiring diagram it can take up to 30v.]]> Paul Wanamaker General Sun, 23 Nov 2014 23:42:14 -0500 https://reprap.org/forum/read.php?1,435426,435953#msg-435953 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435953#msg-435953 TFinleyosu General Sun, 23 Nov 2014 23:07:34 -0500 https://reprap.org/forum/read.php?1,435426,435950#msg-435950 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435950#msg-435950
Quote
george4657
Steppers work on magnetic force from coils of wire. If you feed 3.6 volts at 2.4 amps to the motor it would have full holding power.
To step the motor you reverse the direction of current in the coils. At 3.6 volts this would take a long time so motor would be very slow.
By using a higher voltage the current can be changed quicker and the motor can run much faster. The higher the voltage the faster the maximum speed is. The job of the driver circuit is to stop the current as soon as it hits the maximum allowed , 2.43 amps in your case.
The coil will release its stored current over time and the controler will refresh it to keep the average at the maximum. There used to be a rule of thumb of 20 times stepper voltage for the power supply maximum.

That helps a lot with regard to the confusion of the motor specs.

Do you think I'll run into any issues using the 8825 above the rated max of 2.2A?]]> TFinleyosu General Sun, 23 Nov 2014 22:17:38 -0500 https://reprap.org/forum/read.php?1,435426,435936#msg-435936 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435936#msg-435936 To step the motor you reverse the direction of current in the coils. At 3.6 volts this would take a long time so motor would be very slow.
By using a higher voltage the current can be changed quicker and the motor can run much faster. The higher the voltage the faster the maximum speed is. The job of the driver circuit is to stop the current as soon as it hits the maximum allowed , 2.43 amps in your case.
The coil will release its stored current over time and the controler will refresh it to keep the average at the maximum. There used to be a rule of thumb of 20 times stepper voltage for the power supply maximum.]]> george4657 General Sun, 23 Nov 2014 21:34:27 -0500 https://reprap.org/forum/read.php?1,435426,435933#msg-435933 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435933#msg-435933 TFinleyosu General Sun, 23 Nov 2014 21:21:11 -0500 https://reprap.org/forum/read.php?1,435426,435922#msg-435922 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435922#msg-435922
you have said the current is 2.43 and the resitance is 1.5

ie V = 2.43 * 1.5
= 3.645 volts

This makes more sense. as you can drive that from a 24v supply no issues.
So driving this form a drv8825 stepper driver should be fine (even if a little curent limited)]]> Dust General Sun, 23 Nov 2014 20:20:53 -0500 https://reprap.org/forum/read.php?1,435426,435869#msg-435869 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435869#msg-435869 Note that you do not need to run your steppers up to the full current rating. I have similar Nema23 steppers and am running them using 8825 drivers.

I am using a Rumba, but really I would recommend a Smoothie. It's a 32 bit controller and will do everything that the Ramps etc will do much easier, since it will not be running into 16mhz 8-bit overhead. It has outputs that can be used to run external drivers. It can run a full graphic display without slowing down like the Arduino based controllers. I'm planning on upgrading to a Smoothie.

For a servo motor (I assume is for the extruder) you will need to run an external driver like a Gekko. It might be easier to use a stepper instead.

Edit:
Note that the increased voltage will allow higher speeds, increased current gives added torque. Steppers are always run over their current rating, since the drivers use a chopper circuit that controls the current.]]> Paul Wanamaker General Sun, 23 Nov 2014 17:41:04 -0500 https://reprap.org/forum/read.php?1,435426,435864#msg-435864 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435864#msg-435864 TFinleyosu General Sun, 23 Nov 2014 17:33:39 -0500 https://reprap.org/forum/read.php?1,435426,435860#msg-435860 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435860#msg-435860
Quote
VDX
... so the stated voltage won't fit - this seems to be common steppers, which should be happy with the normal 12V/1.5A-drivers too

Somethings going on, but the previous system used a 24V power supply ... so that's weird]]> TFinleyosu General Sun, 23 Nov 2014 17:23:31 -0500 https://reprap.org/forum/read.php?1,435426,435854#msg-435854 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435854#msg-435854
TB6560: [www.amazon.com]]]> TFinleyosu General Sun, 23 Nov 2014 17:18:15 -0500 https://reprap.org/forum/read.php?1,435426,435846#msg-435846 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435846#msg-435846 VDX General Sun, 23 Nov 2014 17:02:54 -0500 https://reprap.org/forum/read.php?1,435426,435842#msg-435842 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435842#msg-435842 TFinleyosu General Sun, 23 Nov 2014 16:53:25 -0500 https://reprap.org/forum/read.php?1,435426,435803#msg-435803 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435803#msg-435803 See this link [www.linengineering.com]
5718M 4 wire motors are 173 oz-in
5718M-05P is 2.8 amps at 0.9 ohm = 2.5 volts (i*v) or 7 watts (i*i*r)
5718M-02S is 2.1 amps at 1.8 ohm = 3.8 volts or 8 watts
24V * 2.43amps = 9.8 ohm or 58 watts
Measure the resistance of the coils

George]]> george4657 General Sun, 23 Nov 2014 15:26:44 -0500 https://reprap.org/forum/read.php?1,435426,435704#msg-435704 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435704#msg-435704
I have 2 Applied Motion stepper motors (MN23-700-002) and a Lin Enginering stepper motor (5718M-24P-03RO). I am waiting to get the specs from Applied Motion but the Lin Engineering motor is 24V and 2.43A.

I think I need to identify the right stepper drivers if the DVR8825 is not an option.]]> TFinleyosu General Sun, 23 Nov 2014 11:12:36 -0500 https://reprap.org/forum/read.php?1,435426,435578#msg-435578 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435578#msg-435578 Ohmarinus General Sun, 23 Nov 2014 04:37:51 -0500 https://reprap.org/forum/read.php?1,435426,435569#msg-435569 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435569#msg-435569 jamesdanielv General Sun, 23 Nov 2014 03:47:56 -0500 https://reprap.org/forum/read.php?1,435426,435542#msg-435542 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435542#msg-435542
The caps C3, C4, C6, C7, C9, C10 - 100uF capacitor on the board need to be 35v not the cheaper 16v

The mega is powered from the 12v via D1, for 24v D1 must be removed and the mega powered vi another way (its own power plug for eg)

and the 11amp poly fuse need replaced its only rated for 16v

BUT

The standard pololus will work on 24v no issue, but these will not reach the full 2.5amps, 1.5 the realistic max. you can get DRV 8825 which will do 2amps.
For full 2.5 amps... you will need something else..

Also most steppers you run at much higher voltage than listed... the standard reprap one are rated 1-4v are run on 12 and 24v. So your going to need more than 24volt...

You need 'real' stepper drivers]]> Dust General Sun, 23 Nov 2014 00:25:27 -0500 https://reprap.org/forum/read.php?1,435426,435540#msg-435540 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435540#msg-435540 and a kit to build before you build from scratch!

Please tell us the hardware you have to use?

What existing X, Y, Z hardware and electronics used to control it
NEMA 17 or NEMA 23 motors?
Existing external stepper drivers -- I see -there are NO drivers

RAMPS 1.4 shield gets plugged atop an arduino mega 2560.
The arduino has USB connection to PC, and USB 5V powers the arduino.
The RAMPS shield has two power busses, to power motors
via the stepper drivers (5 driver modules (carriers) on RAMPS -- X, Y , Z axes and 2 extruder motors)
and heaters (extruder/bed) via switching transitors

The driver sends voltage to correct coils in motor to rotate them
as controlled by firmware (Marlin or Repetier) running on the arduino micro controller
as commanded via a stream of g-code from PC software.

RAMPS can use
Pololu DRV8825 Stepper Motor Driver Carrier, High Current

[www.pololu.com]

It operates from 8.2 V to 45 V and can deliver up to approximately 1.5 A
per phase without a heat sink or forced air flow (rated for up to 2.2 A
per coil with sufficient additional cooling).

So with the right power supply you can run motors on up to 45V

But I think you have to understand basic simple system before developing custom system

:S]]> cozmicray General Sun, 23 Nov 2014 00:15:58 -0500 https://reprap.org/forum/read.php?1,435426,435526#msg-435526 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435526#msg-435526
Can someone please recommend some hardware?]]> TFinleyosu General Sat, 22 Nov 2014 22:35:24 -0500 https://reprap.org/forum/read.php?1,435426,435525#msg-435525 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435525#msg-435525 TFinleyosu General Sat, 22 Nov 2014 22:21:38 -0500 https://reprap.org/forum/read.php?1,435426,435497#msg-435497 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435497#msg-435497
Controller --> stepper driver --> stepper motor

24v stepper motor voltage drives stepper motors via driver

Some boards have stepper drivers onboard (plugin pololu drives) RAMPS 1.4 5 drivers
driver could be separate off the board

I don't know of a control board that does DC Motor / encoder and stepper on same board?

Do a little studing?

See RAMPS wiki
[reprap.org]
[reprap.org]
[reprap.org]

:S]]> cozmicray General Sat, 22 Nov 2014 19:02:40 -0500 https://reprap.org/forum/read.php?1,435426,435488#msg-435488 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435488#msg-435488 TFinleyosu General Sat, 22 Nov 2014 18:48:08 -0500 https://reprap.org/forum/read.php?1,435426,435486#msg-435486 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435486#msg-435486 VDX General Sat, 22 Nov 2014 18:45:00 -0500 https://reprap.org/forum/read.php?1,435426,435449#msg-435449 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435449#msg-435449
Here:
[reprap.org]

Quote

Specifications

Microcontroller: Atmega2560-16AU
Operating Voltage Electronics:5V
Operating Voltage High:12-24V (15A heated bed, 7A electronics)
DC Current per I/O Pin:40mA
Clock Speed:16Mhz
]]> Ohmarinus General Sat, 22 Nov 2014 16:52:08 -0500 https://reprap.org/forum/read.php?1,435426,435435#msg-435435 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435435#msg-435435
Quote
VDX
... have you according drivers for your steppers?

I'm driving steppers with an Arduino, powered with 12V (internal 5V) while the drivers+steppers are powered with 325V from their own net-plug PSU ...

I'm sorry, but I don't understand what you mean by according drivers.

I don't know what at net plug PSU is. I'm thinking the arduino is consoling the driver almost like a solenoid and the higher voltage is separate from the 12v arduino power. If so can you please point me to some references to that setup.

Edit: I'm thinking you meant acquired steppers. No I have no drivers]]> TFinleyosu General Sat, 22 Nov 2014 16:26:44 -0500 https://reprap.org/forum/read.php?1,435426,435434#msg-435434 Re: Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435434#msg-435434
I'm driving steppers with an Arduino, powered with 12V (internal 5V) while the drivers+steppers are powered with 325V from their own net-plug PSU ...]]> VDX General Sat, 22 Nov 2014 16:20:45 -0500 https://reprap.org/forum/read.php?1,435426,435426#msg-435426 Hardware for 24V 2.5A Stepper Motors https://reprap.org/forum/read.php?1,435426,435426#msg-435426
Bonus requirements: heated chamber control (24V, I think), DC motor/encoder control (I have a very nice motor/encoder extruder setup that would be nice to repurpose). Custom LCD display (existing basic lcd screen on front of machine).

If you guys can throw some ideas or reference material to help me out, that would be great. I would rather customize software/firmware rather than customizing hardware. I'm confused with what challenges are going to be in front of me if I go with something like a DUE with RAMPS-FD and some DVR8825 drivers.

Thanks for any help you can throw my way.

Cheers.]]> TFinleyosu General Sat, 22 Nov 2014 15:43:25 -0500