Ultimaker Google Group

Re: Adding Belt Tensioner, question

2013-05-21T15:13:07Z

Ah great... This one looks good: [link]

So just to be clear, I can add these to my ultimaker without loosening
anything? Just pop off the nut and add it to the side of the wooden block?

On Tue, May 21, 2013 at 10:34 AM, Jeremie Francois <

Re: UM Stepper Motors

2013-05-21T14:57:02Z

are they rated for 5V or higher?
But yes, you can try to add a little more current until they run warm, just
make sure that you are powered down before adjusting these thingies.

--
*Jelle Boomstra*
Lab Manager
Stichting ProtoSpace

*Bezoekadres: Nijverheidsweg 16B, Utrecht
Postadres: Postbus 10152, 3505 AC Utrecht*

Re: Adding Belt Tensioner, question

2013-05-21T14:34:54Z

Yep [link] and less drastic
[link] ... and its own derivative.
I only use the first one, which requires you to extract part of the rod
after loosening the respetcive pulleys and removing the caps, just to
remove the damn wooden block (but you can put them back if ever you find a

Re: UM Stepper Motors

2013-05-21T14:29:55Z

Hi Jelle,
I had a look, I think the torque is actually higher!
The motors are a little bigger (longer) and they don't get warm when
printing.
Do you think that it wouldn't hurt to turn up the stepper drivers a little?
The motors on the official UM at work get pretty warm even during shortish
prints.

Re: Z-Axis shifting

2013-05-21T13:34:53Z

re-align the pulleys and tighten them after that.

--
*Jelle Boomstra*
Lab Manager
Stichting ProtoSpace

*Bezoekadres: Nijverheidsweg 16B, Utrecht
Postadres: Postbus 10152, 3505 AC Utrecht*
*T *+31 (0)30 223 08 75 | *E *je...@protospace.nl | *W *[link]
*open inloop: dinsdag middag + donderdag*

Re: UM Stepper Motors

2013-05-21T13:31:48Z

The lower inductance points to a lower torque, which may explain your
problems. But I think you have it a little too tight. There is 'too much'
for the belt tension too.

--
*Jelle Boomstra*
Lab Manager
Stichting ProtoSpace

*Bezoekadres: Nijverheidsweg 16B, Utrecht
Postadres: Postbus 10152, 3505 AC Utrecht*

Re: UM Stepper Motors

2013-05-21T13:07:12Z

Hi Daid,
Thanks for the reply,
A mix of good and bad news no less!
About time I learnt how to build Marlin from scratch anyway I suppose!
Do you have any ideas about the motor compatibility, are there tweaks that
are possible firmware side to adjust for small motor variances?
Cheers,
Rob

Re: powering the UM with a battery pack

2013-05-21T11:44:30Z

The problem with the 6S is that the 22.2V puts the heater out of spec,
making it 54W instead of 40W. This could quite possibly burn out your
heater. Also, the LM7812 on the board is already at it's limits with 19V,
putting 22.2V on it will increase the chance that it destroys itself.

Re: UM Stepper Motors

2013-05-21T11:40:27Z

The lunchbox computer lives again! (We can rebuild him, we have the
technology!)
But the (free) domain I was using has expired because of it, without a way
to renew it. So daid.mine.nu is dead, a real shame.
The builder is still death tough.

Re: UM Stepper Motors

2013-05-21T11:29:39Z

Hi again guys,
So I wired it up and it seems to work Ok, However the x and y axis are not
quite running correctly,
The motors I have are these ---> 17HS19-1684S
[link] or at least I think they
are,
On my official UM the motors are these -----> SY42STH38-1684A

Re: Z-Axis shifting

2013-05-21T10:28:39Z

Yes George is correct,
The movement I mean is indeed in X-direction, all prints are leaning
towards a side, strangly it's not consistent which side it is leaning to.
What do you mean bij "marking" the pulleys?

I did oil the rods with sewing-machine-oil and it all runs smooth.

The belts do tend to twist , so I intend to try the sollution with the

Re: Adding Belt Tensioner, question

2013-05-21T09:07:27Z

I think there is a slightly nicer design by ultinoob(?) that has a banana
and set screw. Meaning you don't have to un-tension anything. Jeremies
banana sliding blocks are also nice, but the replacement is either
destructive or much work.

--
*Jelle Boomstra*
Lab Manager
Stichting ProtoSpace

Re: Almost Fire. Thermocouple Redundancy?

2013-05-21T08:44:19Z

destructive testing is always fun to watch! video or it didn't happen :)

Re: Almost Fire. Thermocouple Redundancy?

2013-05-21T08:33:32Z

And only after it was fixed, as the initial implementation was broken.
There are quite a few safety features in place. There are 2 kinds of
failures that are difficult. One is a full-disconnect of the 3 wire cable.
The other is a disconnection or a short of the thermocouple, at which point
the AD765 chip starts to report it's own temperature (which is room

Re: The Spring Report (The first big 3D Fair in Erfurt Germany) 2013

2013-05-21T07:46:32Z

Yes that is what I mean !
I think 200 by 200 is enough for something really cool on a tshirt.
I wonder would ultimaker be pissed ? if I printed a few tshirts with the
ultimaker robot... with a smiley face ??? ;-) I always think for such a
happy posative company, the robot looks a littlle...... sterile....