Posts made by gnmrc_

The problem is fixed, G92 command was in a bad position, it was such a simple solution...., sorry to have bothered you so much.

@JoergS5 thanks for the help, you fixed it. I moved the G92 command position and now it works as it should, it was such a dumb fix..... I am so stupid.

@JoergS5 , so endstops works, the leds on the mobo turn on when the machine reaches the endstop in the correct position and if I interrupt the homing sequence before trying to home z the dashboard gives me x,y homed. What I am not able to do is home Z, my z endstop in an FSR switch that triggers when the nozzle touches the bed. My hotend in the home position is outside the build plate, to home Z I need to move the nozzle to the bed center, that is my 0,0 position, to do so I wanted to use a G0/G1 move, but the command continues to move the arm without stopping. This is a post with the video of the machine behaviour.

Something curious that is happening is that if in my homing file I do not home z, and in the dashboard I use a g92 command to home z, the arm works in the right way, but if I add the same command inside the homing file it does not work.

@JoergS5 The endstops work correctly, I tried at the start of the homing file to set G92 Z0 but the arm still does not work.

@JoergS5 sorry, I forgot to link the old thread, @Phaedrux told me to open a new one to make DC42 read it. So here’s the link there you can find also the video of the machine.
I tried not to use any parameter but the printer gives me an error, the arm cannot be moved because it’s not homed even if the arms have reached the endstops.

@Phaedrux yeah I imagine but I am not in a hurry.

@Phaedrux I have created the recap post this is the link.

I’ve built a 5bar scara arm, I can home the 2 arms in the home5barscara.g but when I try to do a G0/G1 move to set the hotend position to the center to home z, the arms overshoot the required position. If I only home the arms then send a G92 Z## from the dashboard the arm works as expected.

This is the config.g file: config (1).g
This is the homig file: home5barscara (2).g

Thanks in advance for the help.

@Phaedrux said in 5bar scara Problem configuring z probe using fsr switch:

This thread is a bit long now. Can you create a summary post of the issue as it is currently and I can pass it along to DC42 to see if he has any suggestions.

@Phaedrux do you have any news from DC42?

@fcwilt yes, it would be simpler to link them there

@fcwilt no but we can use a google drive in the same way right?

@fcwilt Yes they are too big to link them here, the dropbox could be the best way.

@fcwilt ok I’m gonna send it to you, but I have no idea in how to do it. Can I link them here in some way?

@fcwilt It’s not true, we are trying to solve a problem that seems easier than what it really is on a complex and not so well documented machine. You gave a really big help trying to figure out what the problem is, and giving option on how to solve it.

By the way if you want to build one I can give you the cad files so you have the machine too and we can complete the build of a well documented and easy to work scara arm.

Gianmarco

@fcwilt Nice idea, I’m gonna try and see if this trick works.

Thanks for the help,
Gianmarco

@fcwilt for semplicity of wiring I would prefere to have only the probe, but due to all this problems I’m really considering this solution.

Gianmarco

@fcwilt yes in the homing file I tried to use a dummy G92 comand to trick the machine in to moving, but with no success. There is something that I’m missing but I can’t figure it out.

So I wanted to build a SCARA printer because I think that there is a lot of unexpressed potential in this kinematic but due to it’s complexity there aren’t a lot of people that wants to build one of this printers and improve them. This type of printers are left in an embrional state, particularly the 5bar one, the only 2 guys that I have seen make them work are Joerg and Pontus Borg but 3/4years have passed since the last videos and post about those printers.

Thanks for the help,
Gianmarco

@Phaedrux Yes, the heated bed is moved up, but due to the zprobe not being inside the bed area the heated bed crash. But if I manually activate the probe the homing is completed.

@fcwilt so this is what I get from m208:

g28
Axis limits (mm)s X-162.7:250.0, Y-108.5:250.0, Z0.0:200.0
Axis limits (mm)s X-162.7:250.0, Y-108.5:250.0, Z0.0:200.0
Error: Failed to home axes Z

Thanks for the help,
Gianmarco