<![CDATA[SoliForum - 3D Printing Community — another Y-axis calibration]]> https://www.soliforum.com/topic/3621/another-yaxis-calibration/ Tue, 27 Aug 2013 16:06:47 +0000 PunBB <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34379/#p34379 Shotline wrote:

I had the same problem and my "fix" may be just coicidental.  My belt tension is actually not the same on both sides.  The right side is slightly tighter than the left and my circles seem to come out fine.  As I said, this may be coincidental.

I figured this was worth a shot, and it actually worked! My circles started to look a lot better, they still are not "perfect" yet, but I'm on the right track now.  The method to this madness, that I've used, has been to tighten/loosen the one of the y-axis belts till the circle is as good as it is going to get. Then slightly tighten the belt on the y stepper motor. Print and repeat until the circles are damn near perfect (I'm still on this last step).

These are the calibrations files that I have been using.

used this till the circles were near perfect.
http://www.thingiverse.com/thing:34843

I'm currently using this one to true it up. using a nickel and a light behind it you can tell if the circle is getting better or worse.
http://www.thingiverse.com/thing:11215

]]> Tue, 27 Aug 2013 16:06:47 +0000 https://www.soliforum.com/post/34379/#p34379 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34364/#p34364 the_alteran wrote:

Success lads, we're on the right track.  I should be able to complete the calibration by the end of the week. I'll post picks when I get it dialed in.

what method did you use to set the belt tension?  I'm using the money weight thingy and based on that i'm pretty even on both sides.  This fix has my interest..

]]> Tue, 27 Aug 2013 10:39:53 +0000 https://www.soliforum.com/post/34364/#p34364 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34293/#p34293 Success lads, we're on the right track.  I should be able to complete the calibration by the end of the week. I'll post picks when I get it dialed in.

]]> Mon, 26 Aug 2013 13:55:42 +0000 https://www.soliforum.com/post/34293/#p34293 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34282/#p34282 Interesting trick... I have the same issue, been through the usual calibration procedures. I will try it today

]]> Mon, 26 Aug 2013 10:22:34 +0000 https://www.soliforum.com/post/34282/#p34282 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34115/#p34115 I was wondering if that might be a fix...I'll have to try it.

]]> Fri, 23 Aug 2013 20:43:14 +0000 https://www.soliforum.com/post/34115/#p34115 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34114/#p34114 I had the same problem and my "fix" may be just coicidental.  My belt tension is actually not the same on both sides.  The right side is slightly tighter than the left and my circles seem to come out fine.  As I said, this may be coincidental.

]]> Fri, 23 Aug 2013 20:15:10 +0000 https://www.soliforum.com/post/34114/#p34114 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34075/#p34075 After some testing last night, it looks like this same issue for me. The frame looks slightly tweaked which might be accounting for that issue.

]]> Fri, 23 Aug 2013 15:55:22 +0000 https://www.soliforum.com/post/34075/#p34075 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/34030/#p34030 i think it is one of the issues i have. I tried tightening only one screw at a time and do have a better print now. I will try to eliminate the possible source of errors by mounting the motor shaft directly to the Y-axes shaft with a rigid or flexible coupling. Maybe someone else can test this too. I will do it when i have the time.

]]> Fri, 23 Aug 2013 06:36:33 +0000 https://www.soliforum.com/post/34030/#p34030 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/33952/#p33952

Maybe it is the Steppermotor shaft that is not parallel with the y-axes top shaft. Because when Im tightening only two of the four steppermotor screws it gets a little bit better.

Was this the issue? Were you able to fix it?

]]> Thu, 22 Aug 2013 17:24:26 +0000 https://www.soliforum.com/post/33952/#p33952 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/33892/#p33892 actually i do have the same problem with my SD2 since the beginning.
I tried every calibration method found and still the same problem.
I also purchased a pocket scale to measure the belts tension.

Replaced Y-Axes motor, changed the stepper driver to a   SureStepr SD8825 Stepper driver with 1/32 microsteps, changed the pulleys and belts of the Y-axes carriage with HTD Synchrobelt profiles.

All this didnt change a thing.

Maybe it is the Steppermotor shaft that is not parallel with the y-axes top shaft. Because when Im tightening only two of the four steppermotor screws it gets a little bit better.

]]> Thu, 22 Aug 2013 07:28:49 +0000 https://www.soliforum.com/post/33892/#p33892 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/33876/#p33876 Are your grubs tight on the pulleys? Only on jack shaft and drive, not the idlers!

]]> Thu, 22 Aug 2013 02:42:02 +0000 https://www.soliforum.com/post/33876/#p33876 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/33834/#p33834 I've tried everything except for greasing the front idlers, I'll try that and see how that goes.

]]> Wed, 21 Aug 2013 20:24:57 +0000 https://www.soliforum.com/post/33834/#p33834 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/33833/#p33833 If the belts are properly tensioned then it could be that your y carriage is sticking. Grease rods and work back and forth until smooth. Also, be sure your front idlers have grease. Mine didn't. Finally, play with the long y belt tensions.

]]> Wed, 21 Aug 2013 20:21:55 +0000 https://www.soliforum.com/post/33833/#p33833 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/33812/#p33812 the problem is consistant regardless of how long the printer has been on, so I really don't think that board temp is really an issue. Switching out the belt might work, do you know what I need?

]]> Wed, 21 Aug 2013 17:51:43 +0000 https://www.soliforum.com/post/33812/#p33812 <![CDATA[Re: another Y-axis calibration]]> https://www.soliforum.com/post/33762/#p33762 Like Tomek says don't tighten it too much... as this actually stretches the belt slightly which gives more error. Because of the design of the belt the recessed flat spots can become elongated increasing backlash/slippage amount. Some people have switched to GT2 belts which is supposed to have better performance in these areas.

]]> Wed, 21 Aug 2013 05:52:52 +0000 https://www.soliforum.com/post/33762/#p33762