cant print proper circles October 25, 2014 07:17PM |
Registered: 9 years ago Posts: 20 |
Re: cant print proper circles October 27, 2014 06:42AM |
Registered: 9 years ago Posts: 42 |
Re: cant print proper circles October 27, 2014 12:52PM |
Registered: 9 years ago Posts: 20 |
Re: cant print proper circles October 28, 2014 01:20PM |
Registered: 12 years ago Posts: 81 |
Quote
jaques
That's a very good explanation, and something I was thinking about myself before.
However, I've made the belts as tight as possible (more causes binding) and as loose as possible. Results are the same.
I also don't notice any slack on the belts while printing those parts.
I've also printed the same circles at 50% and 150% speeds with the same results, if this helps.
Could it be a power supply issue? The stock power supply has problems running the fans and lights at full speed and brightness respectively when printing and when I turn on print bed heating and hotend heating to prepare for printing, the fans slow down and lights dim. Don't know if the motors get enough power and what happens in practice when they don't.
One last thing I havent tested and adjusted are the stepper chip voltages on the motherboard. Could that affect this? I don't know electronics and so i don't know what setting more or less voltage to the y stepper can result in.
Re: cant print proper circles October 28, 2014 02:12PM |
Registered: 9 years ago Posts: 20 |
Im asking this because Im a newbie: if its an x axis backlash it means the problem is with the x belt or motor?Quote
RobA
No, it is clearly x axis backlash.
Those holders seem to be as tight as I can get them too.Quote
or flex in the attachment point of the belt to the x carriage
You mean inside the X motor? Sure hope not.Quote
or a loose gear on your stepper that walks back and forth slightly on the shaft when changing directions
gears (pulleys) are not 3d printed.Quote
gear/belt slip (are they printed gears or machined gears?)
I dont think I understand this.Quote
or mechanical slop in your carriage that lets it rock
Re: cant print proper circles October 28, 2014 03:17PM |
Registered: 12 years ago Posts: 81 |
Re: cant print proper circles October 28, 2014 03:48PM |
Registered: 9 years ago Posts: 20 |
Re: cant print proper circles October 29, 2014 06:16AM |
Registered: 9 years ago Posts: 20 |
Anonymous User
Re: cant print proper circles October 29, 2014 05:14PM |
Re: cant print proper circles October 30, 2014 02:22AM |
Registered: 9 years ago Posts: 20 |
Yes, I have. I will try it again though.Quote
romels33
Since you said you tightened all your belts, have you also made sure that the Y motor pulley is aligned straight with the pulley right on top of it?
I have checked this too. The rod sticks out equally from both sides and doesn't change its offset as the x carriage moves.Quote
Also, make sure that your "Y smooth rod" (the thinner one that sits horizontally on the back of the printer) is properly aligned. If you take off your side panels, and slide your Y axis back and forth while looking at the sides where that bar sits, that bar should stay in place and should not stick out of the bearing holder to the left nor right. If it does, you have alignment issues.
Anonymous User
Re: cant print proper circles October 30, 2014 07:22PM |
Re: cant print proper circles October 31, 2014 01:50AM |
Registered: 9 years ago Posts: 20 |
I took it off and it didn't affect the print.Quote
romels33
Im not really sure what that other bearing is doing there (the one marked with the red arrow). I don't have that on mine. Also, it doesn't look like it is attached to anything, except for the rod itself. Probably wouldn't hurt to try and take it off, and see what happens.
yesQuote
When you said:
"I have checked this too. The rod sticks out equally from both sides and doesn't change its offset as the x carriage moves."
You are referring to the Y axis right? =) So you grabbed both carriages and slid it back and forth and saw that the y rod was equal on both sides as you slid it? The x axis has no effect on this rod.... =) Just making sure.... =)
Anonymous User
Re: cant print proper circles October 31, 2014 12:49PM |
Re: cant print proper circles October 31, 2014 04:09PM |
Registered: 9 years ago Posts: 5 |
Re: cant print proper circles November 03, 2014 02:44AM |
Registered: 9 years ago Posts: 20 |
Quote
Mechanical problems
1) Problem with the motors (unlikely to be 1. underpowered for what it is intended for, unless everyone else owning a SD4 hasnt noticed this, 2. all 4 of us having faulty motor(s), odds of that are also extremely low)
2) problem with the rods (still bending?) or problem with the bushing setup
3) problem with pulleys and belts and all of us fail to calibrate them properly (unlikely)
Software problems
4) Problem with this version of Repetier Host and Slic3r? (unlikely, jagowilson tried with Simplify3D as well)
5) Firmware (still)
6) Driver? (at this point, who knows?)
Electronics problems
7) PSU (at this point unlikely, jagowilson uses a very poweful PSU, Ive tried running with a car battery)
8) wires?
9) motherboard (unlikely, jaqowilson tried with Rumba board)
Re: cant print proper circles November 08, 2014 11:43AM |
Registered: 9 years ago Posts: 5 |
Re: cant print proper circles November 10, 2014 12:12AM |
Registered: 9 years ago Posts: 20 |