Sintron Delta Build - Buyer Beware! (Page 1 of 3)

You could always go all out and get aluminum parts and the aluminum motor mounts will act as a heat sink.

Connectors about $55 effector $15 and carriages $30 so about a $100 upgrade.

http://www.robotdigg.com/category/15/De … 3D+Printer
Tin

I got folger techs delta which is probably the exact same thing. Make sure you calibrate motor current before running the motors much. I did not due to getting in a hurry and the motors got hot enough to deform the bottom mounts. I had to tear down and reprint new ones. Now it sits in a corner waiting for me to get motivated to finish the wiring.

Didn't get as far as we would have liked to today - too many issues, but did make some progress...

Got all of the frame corners re-printed with no major problems. started putting in the screws & T-nuts to start assembly... test fit a piece of the 2020 to one of the frame corners and our first problem showed up... the T-nuts were bottoming out against the plastic and were no where near being tight on the 2020... so, had to modify each corner piece to reduce the amount of plastic where the T-nuts fit...

Top has been sanded/filed down, bottom is as printed... (had the same issue with the PLA parts, too...)

Ok, so we got all the plastic parts modified, and assembly began in earnest... lower frame was a bit of a pain with the double row of 2020, but it is together...

Upper frame went together a bit more smoothly.

and this is where she stands as of right now... fully assembled bare frame.

We are having to reprint the wheel carriages and the belt/arm assemblies, as well as the effector plate - apparently there is no quality control when it comes to the plastic bits. One of the belt holders had obviously shifted during print, making it useless. another had bad sagging of/around the arm mounts. Cant fit the locking nuts in the holes on the effector plate for mounting the arms... and the list goes on.

The instructions for this thing are basically useless. As I noted before, they were plagiarized from Blomker Industries, with major sections cut out completely. The sections that replaced the cut parts (different assemblies) are little more than "gather these parts" and "assemble them" with pictures of the parts needed, and the fully assembled parts - no direction on what to assemble in what order... you basically have to make a semi-educated guess as to what needs to be done in what order.

I would NOT recommend this particular kit to anyone at this point.

Will attempt to continue tomorrow - need to finish printing the slider carriages and the effector plate before I can go much further... which reminds me... the zip file we were given for the stl files? yeah... only parts out of that we can use were the upper & lower frame parts... no other parts actually in this kit are included in that file, everything else is different... (the file is the Kossel 2020 master originally from github - found it while looking for stl's for the other parts we need. Thank goodness for thingiverse!)

On the FT Delta they use RC tie rod ends that are threaded on to threaded rod. That threaded rod is then inserted and glued with CA glue into a carbon fiber tube that was cut to the correct length to account for the tie rod ends hole center to hole center for the over all desired length.

a little more progress yesterday. Got the latest effector plate printed up (tried several variations, most of which had the same issue as the stock piece) I believe the newest one is going to work - it is a little bit larger in overall diameter, but the spacing between the rod ends is much better - they dont bind anymore, and the spacing of the pairs remains the same as the stock part.

New effector with rods attached - red one is the stock part

at the other end, I modeled up some 2.5mm spacers to get enough clearance between the belt/rod carriage and the wheel carriage..

this is allowing the rod end to move freely.

and one side of the assembled parts...

Got the effector assembly mounted on the frame and found that the carriages are rubbing ever so slightly on the frame rails... a washer between the carriage and wheel solved that problem... (no, washers were not provided in the kit for this)

Rubbing - without washers...

Not rubbing - with washers...

On the agenda today is getting the end-stops in place (will probably mean more printing ahead) and hopefully start on wiring things up.

LOL - thank you for the giggle, Tin. kinda needed that! LOL
But, yeah, that first sentence about sums it up with this one. But hey, if this thread can save someone else the headache down the road, so much the better.

As for the perseverance part - yeah, got my work cut out for me still - need to modify the effector & find another hotend mount/clamp (and/or modify it to fit right), and probably reprint the probe mount as well.
Have already hunted down and printed up some new end stop mounts for it. What they provided was a joke - basically 2 layer thick pads to keep the circuit board from shorting out against the frame - not a "mount" at all.

I am determined to make this thing work - how well remains to be seen - but it WILL work!

for a few more dollars, the FT kit would have been a far better value - even with known issues... (most of which it appears they have corrected)

After some discussion, and a lot of deliberation, the other half has purchased a FolgerTech Kossel kit, so when it arrives my attention will be focused fully on it until it is up and running as I would like to have it operational for the demo day I am doing at the local mall on October 3rd.

The Sintron will still be futzed with & eventually I will get it running in spare time (found a 7 page thread over in the reprap forums on this one - nothing good to say about this kit there either, but most have gotten them up and running, so there is hope). If I can get it running it may go up for sale - sans the E3D lite6 - the stock j-head will be going in.

anyway, still pushing forward on this one till the FT arrives. Not really much to show at this point. I found some much better endstop mounts on thingiverse than the 2 layer thick "pads" Sintron provided that can hardly be called mounts... Got the endstops in place and mounted the box for the Ramps board and printed up some mounts for the psu (way underpowered btw - the heated bed probably wont get hooked up until a better psu is obtained).

As mentioned - rethinking the use of the E3D Lite6 on this one, so swapping in the stock j-head is on the agenda as well as attempting to get some of the wiring squared away. Going to be a busy weekend for me, so probably wont get to any of that until monday...

haha, Tin - if we had found the reprap thread before buying, we probably would not have bought it (basically our own fault for not doing due diligence in searching... =/ )

The good thing is, it has given me a little bit of experience putting a delta together, so I have a small advantage when the FT kit gets here...

i didnt even bother with the auto leveling setup - i dont use it on any of my other printers, saw no need to use it on this thing.

the effector plate I downloaded turned out to not work well with the huge ends they provided.

My suggestion is to go to your local hobby shop (or use an online RC shop if you prefer) and order up a bunch of Revo rod ends - you will need a minimum of a dozen, but I suggest getting a few extras - seems some are sloppier than others.

the Revo rod ends should thread on to the steel rods fine - just make sure you line everything up so that all rods are exactly the same length when fully assembled.

I am also going to be very honest here - I never did finish building this printer. We ordered a Folgertech kit and when it arrived I focused all my attention to getting that one up and running for a demo I was doing at the local mall - I had exactly 1 week to assemble and calibrate it for that show.

I may at some point try to finish putting the Sintron together, but it is not high on my priority list. The Folgertech is larger, and all things considered, a better kit than the Sintron is.

good luck, and keep us posted on how it goes.

yeah, I wondered about the power supply - seemed awfully small...

get one of these instead: http://www.amazon.com/gp/product/B007M … _pC_nS_ttl

will try to PM you the firmware we got with ours.

Thanks so much, it runs now! Now to tackle the auto leveling... It doesn't seem to work with the sintron firmware, I will post a YouTube video of it later.

I had to change the Invert_E setting in marlin to true, and something is wrong with the autolevel. Other than that the stock firmware seems OK.