Need help

[ScubaZan]

I recently purchased the Prusa i3 Dual extruder.

I'm have the same issues as others with either the axis only moving in one direction away from endstop, or not moving at all. I've played with the wiring to make sure it's correct, but here are some photos, including the M119 command.

Please excuse the wire mess. They will be tidied up when the printer is functional and in its permanent spot.

Thank you,

Zan

[zhangxueyou]

Hi, endstops should be connected to X-min,Y-min and Z-min.

[ScubaZan]

Thank you for your reply. I discovered that after my post.
The point of frustration is that the directions clearly state they should be in the Max.

Oh well. Thank you

Now if only I was able to get the Z axis threaded rods replaced since mine have a slight bend and cause the X carriage to wobble, and then stop at about 150mm.

Zan

[ScubaZan]

Ok. So last night after switching the end stop plugs, the axis would move in all directions.

Today, with the exact same setup, the axis will only move in the direction OF the end stops.

Nothing has changed.

[ScubaZan]

PRINTER WILL NOW ONLY MOVE TOWARD ENDSTOP.

When I try to move it in the other direction, it says "Endstop Hit ..."

Here are some pictures

Multimeter readings are at 1.2 volts on the drivers.

Plugs have been checked on all ends tops to make sure none are loose, and the contacts are secure on the board.

[zhangxueyou]

The wiring of endstop is not tight enough.
I suggest you cut the end of Dupont a bit.

[midiman310]

PRINTER WILL NOW ONLY MOVE TOWARD ENDSTOP.

When I try to move it in the other direction, it says "Endstop Hit ..."

Here are some pictures

Multimeter readings are at 1.2 volts on the drivers.

Plugs have been checked on all ends tops to make sure none are loose, and the contacts are secure on the board.

This most certainly sounds like the limit switches and marlin "configuration.h" files are not in sync. If the switches that came with the kit are NC (normally closed), they should look like this.

Switches.tiff (165.17 KiB) Viewed 13646 times

Also, you have the stock Acrylic Pro C i3 (dual extruder) as you say, then you have the GT2560 board (I want one of those boards ). The limit switches lines goes to the end stop signal pin and the other is a direct connection to ground. With that being said, your Marlin configuration.h should be set "const bool X_ENDSTOPS_INVERTING = false". Likewise for the Y and Z axis as well. Remember to also enable endstop pull-ups. When the endstops are hit, this breaks the connection and a logic "1" or high is seen at the signal pin. The pull-up will insure it goes high.
When set properly, the machine will "Home" no problem. I also like to set "#define min_software_endstops=false". This enables me to also home the machine should I accidentally hit "Home all" in the printer software prior to Homing the machine. Hope this helps you, but sure sounds like that's what you're experiencing.

[ScubaZan]

Thank you so much for your input MidiMan.

I figured one problem. After it errors I need to M999 command, manually move the axis if they are on the ends tops(Z especially) the Home each axis individually. After that it will park in the figures I have supplied, and will home again without issue. But I need to repeat this process any time there is an error..

So NOW the more pressing issue.

Every time I heat extruders, it heats up and errors/shuts down with "Max Temp".

I've set the temp on the Rep settings, and the LCD at 220 just to be safe while I'm working on debugging. Every time it climbs well into the high 200's and shuts down..

Any suggestions?

You know, the main issue I have with this "forum" is that all posts need to be approved before viewable?
WTF? I'm sure many problem I'll encounter as a new printer will be easily solved with info from the experienced. I wish we were allowed to communicate more freely.

Thanks Again Gents!

Zan

[zhangxueyou]

Please take a clearer picture of this part which is highlighted in picture, send the picture to my email: Cheung.Weng@geeetech.cn

QQ截图20150417105635.png (683.25 KiB) Viewed 13580 times

[ScubaZan]

For the benefit of others that "may" make the same stupid mistake, I found the error with the temps.

The thermistor and power were reversed, Extruder1 to thermistor 2. Correcting that fixed the problem and there is no more issue.

Printer is running and giving good results. I've had a couple 3-4 hour prints without issue. The only problem I've run in to was for some reason my X axis limit changed by about 10mm at some point and I started printing off of the bed. Change probably happened on one of the several times I've switched back and forth between laptop and desktop for host. Easy enough fix.

I'm my opinion, this forum would be a lot more helpful to beginner printers like myself who will make simple errors if we were more freely able do request help from other users without moderation. Embarrassingly enough, my issues were all easy to fix newb mistakes that did not require "tech support." All it needed was, "Hey man, have you looked at this? Or tried this?"

Thanks Gents,

Zan