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Hello,

Thanks for replying, but, like I already said on my last message :

"I have took a look to the limit_enable thing => it is clearly too drastic ! halting the entire printer is not what I want : I just want the axis to stop at hardware endstop and do not go further on the endstop direction if triggered …"

Following your own link :

"A reset will be required to continue, or sending M999, make sure you move away from the endstop though before trying to move. "

This, is clearly too drastic, so useless in my case …

EDIT:
Please can someone confirm : to resume, on smoothieware, hardware endstops only work for homing action, or as kill switch.
If yes, why is it not simply and clearly written like that on the documentations ?

Re: Problems with endstops by ulysse31ulysse31, 23 Feb 2018 12:02
Re: Problems with endstops by arthurwolfarthurwolf, 23 Feb 2018 10:03

adding the voltage regulator will provide 5V at the endstop inputs or serial port.

Re: Reverse USB Power by arthurwolfarthurwolf, 23 Feb 2018 10:00

Is it possible to provide power from the USB port on the Smoothie? I have a WIFI bridge that I would like to power but the main supply voltage is too high and I don't really have room to add a step down. Does adding the voltage regulator provide power to the USB port or at least the 5v input pins?

Reverse USB Power by tjb1tjb1, 22 Feb 2018 15:10

Hello all,

Same problem here for me as @Dytoractor, I have 6 Normally Open (NO) endstops (one at min and max of each axis), configured with "!" in order to be inverted.
Homing functions works correctly, BUT, after homed (all home_to_min, so min_endstops are triggered), if I ask the printer to go further backwards … it tries to go further even with the endstop triggerred (which, for me, is a complete NONSENSE! ) … worse for max_endstops : even triggered, it tries to go further, hitting the max_endstop does NOT even stop the movement, and does NOT protect the printer.
I have took a look to the limit_enable thing => it is clearly too drastic ! halting the entire printer is not what I want : I just want the axis to stop at hardware endstop and do not go further on the endstop direction if triggered …
I may understand that software endstop are not yet implemented, BUT, AT LEAST, is it possible to have hardware endstops working correctly ?
May be there is an explanation for this behaviour, I would be glad to know it, could someone explain that ?
Thanks a lot.

PS: @Dytoractor : did you found a way to avoid this ?

Re: Problems with endstops by ulysse31ulysse31, 22 Feb 2018 09:47

Ok thanks. One last question. I didn't see this in the laser module of the documentation.

I'm going to be using all the stepper drivers because I have a Prusa i3 type printer. So all the pwm pins in the laser cutter documentation will be used.

Could I then wire the TTL port of the laser driver module to any of the pins mentioned in the configuration?

From the configuration file:

Only pins 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 1.18, 1.20, 1.21, 1.23, 1.24, 1.26, 3.25 and 3.26 can be used since laser requires hardware PWM.

Or do I use the TTL pin:

#laser_module_ttl_pin                           1.30            # This pin turns on when the laser turns on, and off when the laser turns off.

But that's confusing because it seems like it's only on or off. I want to be able to vary the power.

Anyway, sorry if I'm asking too many questions but you've been a big help and it's awesome that you're so willing to help the community. Thanks.

Ooohhhh. I see. So is the fundamental difference between the two methods is that the PWM is tuning the laser on and off and the driver board varies the current rather than turning off the laser so often?

If that's the case, I could see why PWM would reduce the life of the laser.

You can do what you did with Rambo with Smoothie, Smoothie can do 12V PWM ( for example it does for hotends, but it can for lasers ). It's just not how the laser is supposed to be used, current needs to be regulated, that's what the driver board is for, and if you skip it, you'll likely severely reduce the laser's life.

Oh ok gotcha. I was just using my Rambo board to power my laser so I thought maybe I could do the same with the smoothieboard. Is it because the smoothieboard can't do 12V PWM? Or is it just too much current for the pwm outputs?

Re: Octoprint
mlaustin6mlaustin6 18 Feb 2018 20:21
in discussion Smoothie Firmware / General » Octoprint

Good to know, thanks.

Re: Octoprint by mlaustin6mlaustin6, 18 Feb 2018 20:21
Re: Octoprint
arthurwolfarthurwolf 18 Feb 2018 17:53
in discussion Smoothie Firmware / General » Octoprint

There in no need to do any of this …

Re: Octoprint by arthurwolfarthurwolf, 18 Feb 2018 17:53

Oh a laser that power definitely needs a laser driver board. That board has a TTL input, which you wire to any PWM pin on Smoothie.

Thanks, Arthur!

I looked through the documentation. One thing that I'm not sure about is whether I can connect the laser directly to the smoothieboard. It's a 2.5W laser so it's using less than 1A if powered by 12V.

Can the smoothieboard control the laser with PWM? Where would I hook the laser to the smoothieboard?

Re: Octoprint
mlaustin6mlaustin6 18 Feb 2018 15:35
in discussion Smoothie Firmware / General » Octoprint

I couldn’t put s link in so here it is Butchered.

github dot com/foosel/OctoPrint/wiki/Setup-OctoPrint-with-Smoothie

Re: Octoprint by mlaustin6mlaustin6, 18 Feb 2018 15:35

Sure, marlin isn't really designed for this, Smoothie is.

See the laser documentation on the wiki.

Re: Octoprint
arthurwolfarthurwolf 18 Feb 2018 11:45
in discussion Smoothie Firmware / General » Octoprint

What guidelines are you talking about exactly ?

Re: Octoprint by arthurwolfarthurwolf, 18 Feb 2018 11:45
Octoprint
mlaustin6mlaustin6 18 Feb 2018 08:11
in discussion Smoothie Firmware / General » Octoprint

I tried to follow these guidelines on the Smoothie GitHub for setting up Octoprint. I did all of the commands. For step 8 Once the file or files are uploaded, press System -> Copy to SD., I am not getting an option to copy to the SD card. I have Smoothie connected to Octopi via USB and Octopi is hard wired.

Does anyone have any suggestions? I can't find an answer anywhere. Is it even needed to do all of these commands in 2018?

Octoprint by mlaustin6mlaustin6, 18 Feb 2018 08:11

Hello everyone, I have a prusa i3 that currently is running a RAMBo board. I added a small 2.5W diode laser to it so that I can swap between the laser and the extruder. I haven't been able to find some good software to generate gcode for laser engraving that is compatible with Marlin.

I wanted to upgrade to a Smoothieboard but I wanted to know if what I want to do is possible.

Can I connect the laser and 3D printer extruder on the same board at the same time? I don't want to have to switch the cables around every time I switch between the two.

Also, where would I connect the laser on the smoothieboard?

Thanks.

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