I could use some help

[A Former User]

@fcwilt the specs for the motors are in the lower picture, 600 V/1mA.

[A Former User]

@fcwilt

Motor specs:

Phase: 2, Rated current DC 1A / phase
Rated voltage DC4.5V, step angle 1.8 degrees + or - 0.09 degrees 
phase resistance (20 degrees C) 4.5X(1 + or = 15%) ohm / phase
Phase inductance (1 KHZ) 9.5X (1 = or - 20%) mH / phase 
Holding Torque more or less 420 nM.m 
Position torque 15 mN.m REF. 
Grade: 0.25Kg REF. 
Insulation resistance more or less 100 M ohm (DC 500V)
Turn (shaft extended to look) A-AB-B-clockwise
Electrical strength AC600V/1mA/1S 
Moment of inertia 57.3g.cm squared
Insulation grade: B 
Maximum no-load operating frequency more or less 1500 PPS 
Maximum no load starting frequency, more or less 1000 PPS

[A Former User]

@fcwilt you must be gone.

I'm going to go look for the box the Xvico came in.

Mark

[fcwilt]

@mac said in I could use some help:

@fcwilt you must be gone.

I'm going to go look for the box the Xvico came in.

Mark

I was outside filling up the hot tub.

The specs you posted are reasonable as those steppers are but 38mm in length.

And if they are the steppers that came with the printer then my theory as to what is wrong is looking very good.

Still when you get a chance run the test I posted about using G1 H1 Y-10 moves repeatedly until the endstop is activated.

Until I know the result of that I cannot describe the next test to try.

Thanks.

Frederick

[A Former User]

@fcwilt I did the test, multiple times this morning, and posted the results, which are above this post. I'm going to copy and paste them, and resend them to you.

[A Former User]

@fcwilt see above?

[A Former User]

@fcwilt said in I could use some help:

here are the results: I discovered that my wireless mouse and the printer aren't really communicating. Sometimes, the bed moves the whole 10mm's, sometimes it turns half or less of that. So it isn't click, pulley turns, bed moves 10mm's, it's more like click, nothing happens, click, the pulley turns 3 mm's, click, the pulley doesn't do anything, click, it turns 10mm's.
So I turned off the wireless mouse, and plugged a USB mouse into my keyboard.
I'm going to do the test again, from the beginning.

[A Former User]

@fcwilt said in I could use some help:

Test no. 2, same results with a wired mouse. I'm clicking the same way every time, and that's not working every time. Maybe the wifi is wonky?
Status isn't reporting anything.

[A Former User]

@fcwilt said in I could use some help:

so here's some bad news: I'm experimenting with the code (G1 H1 Y-XX FXXXX). I used 2600 for the F, because that "speed?" worked last night? No change, really. The signal's going to the printer are having a hard time getting there, or, the printer's having a hard time understanding and acting on them?
So then I changed the code to: G1 H2 Y-20 F2600
The bed slides towards the rear like it's on ice.
And here's some more bad news: Status is displaying the position of the bed. Y is at -160 now.
The end-stop fully compressed.
Mac

[A Former User]

@fcwilt said in I could use some help:

more bad news: I went to the Dashboard. There, Display is showing me the position of the bed. (So maybe, when you're in the CONSOLE, that information isn't available?).
Anyways, the bed is at 87 right now. That's the 18" mark (the 457mm mark).
The jog selections for Home Y are available.
Mac

[A Former User]

@fcwilt it's 9:25 here.

I just Home Y'd the bed.

It smashed into the front adjustment bar.

In Status, Y is reporting the bed is at 110.0 (which is B.S.).

I can use the Y-jog buttons to move the bed back to 0.0, but that's as far as the bed will go.

So now I'm at Y=0.0.

The bed is in the middle of the metal ruler, at 244.475.

Status is saying that Y is 0.0.

[A Former User]

@fcwilt M119 is reporting that all of the endstops are not stopped, which is true.

G91 has been sent to the printer.

G1 H1 Y-2- F3600 caused the bed to move back / to the rear approximately 1mm (instead of 20).

I sent the command again, the bed moved slightly more, but no where near 20mm's.

I sent the command again. I hear the sound of a motor spinning? But the bed when nowhere.

Clicking on the SEND command is producing varying results from no move to short moves to occasional long moves.

Mark

[fcwilt]

@mac said in I could use some help:

@fcwilt it's 9:25 here.

I just Home Y'd the bed.

It smashed into the front adjustment bar.

In Status, Y is reporting the bed is at 110.0 (which is B.S.).

I can use the Y-jog buttons to move the bed back to 0.0, but that's as far as the bed will go.

So now I'm at Y=0.0.

The bed is in the middle of the metal ruler, at 244.475.

Status is saying that Y is 0.0.

Anytime you cannot move the axis because it is at one limit or another just execute M564 S0 and the limits will be ignored - until you re-boot the printer.

We know homing of Y is not working and we have not made any changes (yet) that will fix that.

The steps I outlined will help us understand why homing is not working.

Here is a re-cap of what I posted:

You posted that you were having success doing G1 H1 Y-10 commands and it moved 10mm at a time and the DWC display for the position of Y was consistent with those moves.

Is that correct?

If it is correct I would like you to do another test, starting with the bed somewhere in the middle of it's travel, so it has a ways to go before it reaches the endstop switch.

Then from the DWC console:

• issue a M119 command to check the state of the endstops
• issue a G91 command to set relative movement mode which is necessary for homing
• issue as many G1 H1 Y-10 F3600 moves as it takes to get the bed to the position where the endstop switch is triggered
• check the DWC Y position display after each move to see if anything odd is happening
• when you finally reach the position were the endstop switch is triggered issue another M119 to again check the state of the endstops

What I am trying to check is if the problem only occurs when you try to do long Y moves but short Y moves, like 10mm, work fine.

So I am running around the house like a crazy person doing chores to get ready for our summer guests here at the lake.

But I will keep checking in to read your posts.

Hang in there.

Frederick

[A Former User]

@fcwilt nah, man, that's a bad idea. Guests are way more important. You do your thang, okay? get ready for your guests, and enjoy the whole experience.

Get back to me when you really have the time.

Between now and then, I'll redo the tests according to the post I'm replying to, where you presented the information / instructions in bold face.

I'm upload the results to you, and you can get back to me when you really have the time.

Mark Out.

[fcwilt]

@mac said in I could use some help:

@fcwilt nah, man, that's a bad idea. Guests are way more important. You do your thang, okay? get ready for your guests, and enjoy the whole experience.

It's always nice to greet the guests when they arrive.

But you know the best part?

Waving to them when the leave.

Frederick

[A Former User]

@fcwilt I redid the test. I shot a video of it. I'm uploading that to youtube as I write this.

The Status Display didn't provide any new information. Y remained at 0.0 the whole time.

I had to click SEND dozens of times to get the bed all the way back to the end-stop. When the bed refused to move any further, I looked at it, and tried to capture video of it. That's when I touched something with my phone, and turned the recording off.

But there's enough visual information in the video I'm uploading to show you the behavior of the bed.

I'm thinking there's a major band-width problem here. Whereas if I was sending a command where Y-50 or Y-110 was the setting, because it was one message sent to the board, the board would get that message, and act accordingly.

How to change / fix that, I don't know, but I'll see what I can do about it.

Enjoy the party!

Mark

[A Former User]

@fcwilt link text

This is the video I made of the test.

@droftarts

[pjl]

@mac from the video it sounds like stepping issues, like if it was low current with way too high rpm.

But looking at this thread (wtf how is this 500+ replies in a few days ) im inclined to believe that has been thoroughly looked over in the config.g?

And then I'd still look at the basics again before anything else. Is everything really wired properly.. I swear for me thats the issue 70% of the time

[droftarts]

@mac I watched the video. Y axis is moving a random distance each time. I would say either:

• the motor can’t handle the current jerk or acceleration settings, or
• the pulley on the motor shaft is loose.

I’d actually think the second of those is most likely. Have you ever taken the pulley off the motor shaft? When you replaced it, it should have a grub (or set) screw that screws onto the flat on the motor shaft. Check this is tight.

Ian

Edit: to test, get a Sharpie and put a dot on the end of the motor shaft and pulley. Then move the axis, and see if the dot on the motor shaft and pulley go out of alignment.

[rexx]

just had to reply here for the reply count cheers maybe try an rc car???... best of luck and big up's to those trying to help out here