ramps 1.4 with nema 34 help needed
April 14, 2016 05:56AM
Hi everyone, I'm building my first 3D DLP printer (3D SLA printer). I have my ardunino mega board, ramps 1.4 with DRV8825 driver modules.

The specifications of the ramps 1.4 board say 12 volts at 11amps or 12 volts at 5amps, however I want to use a nema 34 the required voltage is 24-60V 5.5amps current/phase. Can anyone help me with connecting this up, any diagrams or tutorials would be great but any help would be greatly appreciated.

Thanks in advance
Steve
Re: ramps 1.4 with nema 34 help needed
April 14, 2016 10:28PM
24-60V 5.5amps is very problematic

Pololu modules including drv8825 have a 2amp max limit, yes they could be run at 24v... but not 5 amp.. (maybe if you ran them in liquid nitrogen!)

You need to look at something like these Motor Drivers Controller but even that's only 4amp

Then you just wire the external stepper driver to enable, step and direction and gnd pins of the pololu module socket

Edited 2 time(s). Last edit at 04/14/2016 10:37PM by Dust.
Re: ramps 1.4 with nema 34 help needed
April 17, 2016 05:04PM
Hi Dust
Thanks for the reply, any chance you can explain in a bit more detail?

i.e.if I ground the pololu module (how do I do that?) do I simply connect the stepper output of the ramps board to the stepper input of the suggested motor driver controller?

As you can probably guess, I have no idea how to do what you recommended, any diagrams would be great or an idiots guide.

Thanks again
Re: ramps 1.4 with nema 34 help needed
April 18, 2016 05:28AM
Basically this... from [3dtoday.ru]




instead of using pololu type modules, you just use the step, direction, enable pins to your external stepper driver

Edited 1 time(s). Last edit at 04/18/2016 05:30AM by Dust.
Re: ramps 1.4 with nema 34 help needed
April 18, 2016 09:08AM
Thanks Dust, thats great, just what I needed smiling smiley I take it I don't use the jumpers to set the micro stepping on the ramps 1.4 board?

Thanks again
Re: ramps 1.4 with nema 34 help needed
April 18, 2016 11:38AM
Maybe Powerlolu could be an option? [www.thingiverse.com]
Quote

High Power Pololu Board (Powerlolu) based on A4989 - can be connected to RAMPS Pololu port.

Powerlolu can drive stepper motors up to 500 Watts, drawing currents up to 10 Amps.

Edited 1 time(s). Last edit at 04/18/2016 11:38AM by [email protected]
Re: ramps 1.4 with nema 34 help needed
April 18, 2016 11:04PM
Correct, when using this type of setup the micro-stepping jumpers are not used, micro-stepping is setup on the external controller.
Re: ramps 1.4 with nema 34 help needed
April 19, 2016 06:40AM
Oh look someone just posted about this stepper controller... in another forum.

[www.automationtechnologiesinc.com]

It does 20-50VDC 5.6A , and not to high a price... Should be a good fit for your stepper motor
Re: ramps 1.4 with nema 34 help needed
April 27, 2016 05:39AM
Thanks for all the help Dust
Re: ramps 1.4 with nema 34 help needed
April 27, 2016 06:01PM
Thanks [email protected] that looks interesting smiling smiley
Re: ramps 1.4 with nema 34 help needed
April 28, 2016 01:39PM
Quote
onearmpilot
Thanks [email protected] that looks interesting smiling smiley

FYI : powerlolu ordering: [forums.reprap.org]
Re: ramps 1.4 with nema 34 help needed
June 05, 2016 04:25AM
Dear All!
I have connected the Ramps to the extenal driver TB6560 as the diagram below but they all still not work. Do we need chang anything in Marlin? Thank you
(1X) RAMPS + (3X) TB6560 + (3X) NEMA 23
February 26, 2018 07:36PM
Can someone help me?
I am making this connection: (1X) RAMPS + (3X) TB6560 + (3X) NEMA 23. I checked above where it says that the connection of the image is wrong:

http://3dtoday.ru/upload/main/b03/%D0%9C%D0%9E%D0%AF%20%D0%A1%D0%A5%D0%95%D0%9C%D0%90%20 % D0% 9F% D0% 9E% D0% 94% D0% 9A% D0% 9B% D0% AE% D0% A7% D0% 95% D0% 9D% D0% 98% D0% AF% 20% D0% B2 % D0% B0% D1% 802.jpg

But I did not understand the comment that says it is wrong, because at first the RAMPS has the 5v pin. According to the following link.

https://www.zonemaker.com/product/43/ramps-1-4-3d-printer-shield

However, in this same link shows a totally different connection. Which is also more detailed in the following link:

https://www.zonemaker.com/product/44/tb6560-3a-stepper-motor-driver-board

And now, what is correct? It seems to me that there was a change of position between the + and - pins.

In the image:
http://3dtoday.ru/upload/main/b03/%D0%9C%D0%9E%D0%AF%20%D0%A1%D0%A5%D0%95%D0%9C%D0% 90% 20% D0% 9F% D0% 9E% D0% 94% D0% 9A% D0% 9B% D0% AE% D0% A7% D0% 95% D0% 9D% D0% 98% D0% D0% B2% D0% B0% D1% 802.jpg

Cited above, the positive pins (EN + / CW + / CLK +) would be connected to the 5v of the RAMPS board, while the other negative pins (EN- / CW- / CLK-) are connected to the respective pins of each RAMPS driver.

On the link link is the opposite, the negative pins (EN- / CW- / CLK-) are connected to the GND of the respective RAMPS driver, while the positive pins (EN + / CW + / CLK +) are connected to the other pins of the respective ramps driver.

If the connection of the link I sent is correct, I had the following question: how do you get the other TB6560 drivers in the RAMPS? Should the negative pins of each TB6560 driver (EN- / CW- / CLK-) be connected to each GND of the respective RAMPS driver or should all GND drivers be connected to a single GND of the RAMPS? According to the example of the following link:

http://andre.team9.99.org.nz/2012/10/replacing-pololu-stepper-drivers-with.html

It seems to me that in this example all the negative pins of all the drivers (EN- / CW- / CLK-) were connected in a single GND pin of one of the drivers in the RAMPS.

Can someone help me with this link?
Re: (1X) RAMPS + (3X) TB6560 + (3X) NEMA 23
February 27, 2018 12:16AM
The 5v pin on the ramps has 0 volts on it. It only connects the 5v pin to the 5v lines of the servo plugs,

It is designed to be jumpered to the Vcc pin above it to put 5v on the servo lines.
Re: (1X) RAMPS + (3X) TB6560 + (3X) NEMA 23
February 27, 2018 07:09AM
OK, thanks Dust.
But what is the correct connection to use this configuration:
 (1X) RAMPS + (3X) TB6560 + (3X) NEMA 23
Re: ramps 1.4 with nema 34 help needed
February 27, 2018 08:36PM
The GND's its doesnt matter, they are all connected on the ramps anyways, So all together or use the individuals per stepper its up to you wich you like better.


Because the TB6560 has -ve and +ve connectors it can be connected either way.

step pin do you want it to step on a low or high signal? Answer: It doesn't matter.
direction pin, high or low? Answer: It doesn't matter as stepper can have direction reversed in firmware or with a simple rewiring of stepper cables.
select high or low? Answer: It doesn't matter as can be inverted in firmware. default is active low.

So pick one and make the firmware match.
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