<![CDATA[SoliForum - 3D Printing Community — Y Stepper Crawling]]> https://www.soliforum.com/topic/3600/y-stepper-crawling/ Fri, 13 Sep 2013 05:16:58 +0000 PunBB <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/36181/#p36181 Just closing the loop on this thread.

I've had the RAMPS/MEGA combo up and running for a couple weeks now.

Clearly the problem was the Sanguino as things just worked once I had the everything put back together with the new board.

]]> Fri, 13 Sep 2013 05:16:58 +0000 https://www.soliforum.com/post/36181/#p36181 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/34021/#p34021 Briggs wrote:

I wonder what would happen if you swap your good drivers into the y driver slot?

I swapped drivers (the driver is fine).
I swapped stepper wires (the wires/motors are fine).
I swapped PINS on the ATMega (PINS are fine)
I swapped the resistor, and capacitor (those are fine).

IronMan wrote:

Did you end up checking for dry solder conditions on the back of the board?  This happened to me on another piece of equipment...sometimes very difficult to see.

The only questionable solders I saw were my own on the replaced resistor and capacitor and I redid those better...no difference.

Thanks all for the suggestions.

I ordered a Ramps 1.4 / Mega 2560 combo today, though it would have been nice to isolate the problem with the Sanguino, I feel I made a good effort to fix what I had before spending the money on an upgraded board.

]]> Fri, 23 Aug 2013 05:09:14 +0000 https://www.soliforum.com/post/34021/#p34021 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/34003/#p34003 IronMan wrote:

Did you end up checking for dry solder conditions on the back of the board?  This happened to me on another piece of equipment...sometimes very difficult to see.

Yeah, I have seen this many a time on older televisions, usually in the hi frequency circuit.

]]> Fri, 23 Aug 2013 01:34:57 +0000 https://www.soliforum.com/post/34003/#p34003 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33912/#p33912 Did you end up checking for dry solder conditions on the back of the board?  This happened to me on another piece of equipment...sometimes very difficult to see.

]]> Thu, 22 Aug 2013 14:00:44 +0000 https://www.soliforum.com/post/33912/#p33912 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33911/#p33911 I wonder what would happen if you swap your good drivers into the y driver slot? Reminds me of the time I replaced my timing chain on my Pontiac gto, and then could not get it started. The fuel pump went out at the same time I was fixing the timing chain. What are the odds.

]]> Thu, 22 Aug 2013 13:42:14 +0000 https://www.soliforum.com/post/33911/#p33911 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33907/#p33907 Hmmm....


very strange... I thought for sure you would find something while wiggling plugs around.... been too busy aat work to have much time to actually do anything with my spare board... maybe this weekend smile

]]> Thu, 22 Aug 2013 12:07:28 +0000 https://www.soliforum.com/post/33907/#p33907 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33886/#p33886 I've replaced the resistor and capacitor with no change in behavior.

I also did as you suggested ronsii and pushed/pried on the board & plugs while the monitor was turning.

I also checked the voltage during this operation and it fluctuates +/- .005v, which I don't imagine makes a difference here, but this is something different than the other stepper drivers which only vary .001v generally.

So at this point I'm contemplating upgrading to a Ramps 1.4 / Mega 2560 combo.

]]> Thu, 22 Aug 2013 05:46:22 +0000 https://www.soliforum.com/post/33886/#p33886 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33754/#p33754 have you tried a little pushing/prying on the board/plugs/whatnot when you are commanding it to move...

]]> Wed, 21 Aug 2013 04:21:45 +0000 https://www.soliforum.com/post/33754/#p33754 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33751/#p33751 To rule out the ATMega, I swapped the pin assignments for X and Y in PINS.H and confirmed the changes took (Y moved for X and visa versus).

So I've now ruled out:
- The stepper motor, wire, and connector
- The driver
- The microprocessor

Here's what I think is left:
- The resistor
- The capacitor
- The PCB (perhaps dry solder)

Anything I'm missing in this list?

]]> Wed, 21 Aug 2013 04:03:22 +0000 https://www.soliforum.com/post/33751/#p33751 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33690/#p33690 2n2r5 wrote:

Your connections to the motor maybe intermittent and/or it is only driving one coil. It wouldn't hurt to take a small flat blade screw driver and try to "recrimp" the wires in the connector for that motor.

It's not the motor as I swapped the Z and Y leads and the Y motor worked fine.

It's also not the driver as I swapped those.

It's something on the board.

]]> Tue, 20 Aug 2013 17:58:21 +0000 https://www.soliforum.com/post/33690/#p33690 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33674/#p33674 Your connections to the motor maybe intermittent and/or it is only driving one coil. It wouldn't hurt to take a small flat blade screw driver and try to "recrimp" the wires in the connector for that motor.

]]> Tue, 20 Aug 2013 16:25:30 +0000 https://www.soliforum.com/post/33674/#p33674 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33670/#p33670 ronsii wrote:

you could probably check them in circuit with moderate results.... if you check the resistor and it's open or a lot higher ohms than it's supposed to be of course it's bad same with the cap if it shows a short it's probably bad... I kinda doubt it's this though...

I checked both the resistor and cap relative to each of the steppers and am getting consistent measurements across them.  They also look fine physically.  So they seem OK, and now I'm at a loss for what to check/try next :-/

]]> Tue, 20 Aug 2013 16:13:51 +0000 https://www.soliforum.com/post/33670/#p33670 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33643/#p33643 ronsii wrote:

Other things it may be is metal debris on the back side of the main board... it wouldn't be the first time an errant piece of tiny wire trim was causing problems on the back of a SD printer board....

That happened to me once, piece of tiny wire on my stepper driver... I guess everyone's workshop is the same.

]]> Tue, 20 Aug 2013 13:16:18 +0000 https://www.soliforum.com/post/33643/#p33643 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33623/#p33623 you could probably check them in circuit with moderate results.... if you check the resistor and it's open or a lot higher ohms than it's supposed to be of course it's bad same with the cap if it shows a short it's probably bad... I kinda doubt it's this though... I have an extra sang board laying around here somewhere... if I get a chance I'll look at it and try to do a reverse simulation of what might cause this... too late now, got to hit the hay... wakeup time comes early tomorrow sad

]]> Tue, 20 Aug 2013 06:36:31 +0000 https://www.soliforum.com/post/33623/#p33623 <![CDATA[Re: Y Stepper Crawling]]> https://www.soliforum.com/post/33622/#p33622 Voltage was the first thing I checked, it's fine.

I didn't remove the reset jumper when I first installed the chip and I'm guessing it got caught up on that.

Back of the board was clear.

Tomorrow I'll hit Radioshack for these:
http://www.radioshack.com/product/index … Id=2062350
http://www.radioshack.com/product/index … Id=2102510

And see if I can get things working again before the new stepper arrives.

]]> Tue, 20 Aug 2013 05:58:56 +0000 https://www.soliforum.com/post/33622/#p33622