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Geeetech Rostock 301 first topic

Posted by raoulito9 
Re: Geeetech Rostock 301 first topic
February 08, 2017 03:46AM
Hi

I am new to this forum so I apologise is this is answered elsewhere. I have built my Geetech 301,
I am having problems with missing steps, i looked around and learned that is could be the stepper driver voltages out, I tested them by measuring across the pots to the USB cover, the readings on all 6 pots was 6.7 to 6.9 which i thought was correct.
I thought I would check with Geetech support and the answer I got confused me even more.

'' No,it's not that range(5.7-5.9).
It should be 0.8-1.2V between the pot and GND,and 3.3V or so between VDD and GND.
Regards, ''

Should I increase them to 8.0 ?
Re: Geeetech Rostock 301 first topic
February 08, 2017 03:51AM
No, you are not correctly measuring the Vref from the stepper driver.
Re: Geeetech Rostock 301 first topic
February 08, 2017 05:19AM
Not 8.0Volts, the correct value is 0.8Volt to 1.2Volt for extruders and 0.7Volt for mouvement steppe motor.

Edited 1 time(s). Last edit at 02/08/2017 05:21AM by L'ami René.

Un pour tous et tous pour un !
One for all and all for one !
Re: Geeetech Rostock 301 first topic
February 08, 2017 10:52AM
thanks for the reply, 5.7 - 5.9 should have read 0.57
so do you think if I set it to 0.7 it will improve the torque without overheating the steppers.
and is putting the probes on the pots directly and ground from usb cover on the board is ok. I got that from a couple of YouTube videos.
Re: Geeetech Rostock 301 first topic
February 08, 2017 10:55AM
No, take the ground from the gnd of the stepper driver.
Vref to 0,8 will not over heat your motors.
Re: Geeetech Rostock 301 first topic
February 08, 2017 11:57AM
Hi Steve.
Flintewn is right, I recommand you to set steppers vref to 0,85, and extruder VRef to the max possible (around 1,15 for me...)
No over heating for steppers with thoses values. they even don't get warm...
Those values were correct for me, and i stopped missing steps....
Think abour replacing your plastic extruders with good metallic ones, and remove the useless extruder fans!
:-)
Re: Geeetech Rostock 301 first topic
February 08, 2017 02:46PM
thanks very helpful, i'll let you know how it goes, and I do have the metal extruders ready to fit, just trying to get motion sorted first.
Re: Geeetech Rostock 301 first topic
February 08, 2017 02:57PM
thumbs up

Edited 1 time(s). Last edit at 02/08/2017 02:58PM by raoulito9.
Re: Geeetech Rostock 301 first topic
February 24, 2017 04:22AM
Mine kept skipping - even with metal extruders - since the problem for me is really in the torque that the extruders can provide. Even with Vref cranked up to 1.xx.
Metal extruders improved a little bit, but not at all as it should: So I created my own Wades Extruder!
I should post it on ThingyVerse soon, for now here some pics - ask me if you're really interested and I'll speed up posting winking smiley -- byt the way: they are set up in a generic way I think - so this way of working should be OK for any extruder mounted on 31x31mm square 4 bolts of 3mm.
There are no ballbearings and the new axle is simply a 5mm thick nail with cut out flat part to let the bolts on the gears snap firmly. They also do make sometimes a bit of noise (nice, crickets in da house...?) - but hey - better than buying 3 new motors for like 100$ (and wating for delivery like 6wks)
Here also some pics of printing 3DBenchy before and after mounting my WadesExtruders.
PS: my motors even now do not get warm, although they run 3times faster.

Edited 1 time(s). Last edit at 02/24/2017 04:27AM by MikaëlV.
Attachments:
open | download - firstdesign.jpg (143.7 KB)
open | download - gearprinting.jpg (103.6 KB)
open | download - newdesignmounted.jpg (116.5 KB)
open | download - 3dbenchy.jpg (99.9 KB)
Re: Geeetech Rostock 301 first topic
February 24, 2017 11:13AM
Wow.
This is a clever design.
Someone else (extruder0), in a previous post showed how he replaced the extruders with a similar gearmotor system. The only problem was that is was quite expensive.
My prints are now corrects, i pushed the temp to 225 for PLA and kept the speed around 30 to 50 mm/sec.
Did you achieve good prints faster than that ?
Do you use PLA ?

My actual problem (no satisfying solution so far) is the retract, not efficient as it is with the diamond head.

Your solution is still very intersting, please share the links of your designs as soon as you'll have uploaded them on thingiverse !

Edited 1 time(s). Last edit at 02/24/2017 11:14AM by raoulito9.
Re: Geeetech Rostock 301 first topic
March 05, 2017 08:38AM
Having fun - see my updates: [www.youtube.com]
The fan is a bit tricky... Not sure if it will not melt or seriously deform in longer prints - it survived reasonably 2hrs this morning though grinning smiley

Edited 1 time(s). Last edit at 03/05/2017 08:39AM by MikaëlV.
Re: Geeetech Rostock 301 first topic
March 05, 2017 08:51AM
Quote
raoulito9
Wow.
This is a clever design.
Someone else (extruder0), in a previous post showed how he replaced the extruders with a similar gearmotor system. The only problem was that is was quite expensive.
My prints are now corrects, i pushed the temp to 225 for PLA and kept the speed around 30 to 50 mm/sec.
Did you achieve good prints faster than that ?
Do you use PLA ?

My actual problem (no satisfying solution so far) is the retract, not efficient as it is with the diamond head.

Your solution is still very intersting, please share the links of your designs as soon as you'll have uploaded them on thingiverse !

Hi Serge,

I've seen those expensive motors indeed and didn't wanted to spend that amount of money on enchancements for my first printer.
Is pushing your temp that high not giving you very brittle parts (très fragile)?
I will now start to play with the retract - and am currently using Cura 2.4. I want to try the Coasting option.
My speed is currently 25mm/s and travel up to 35. When I go higher I get shifted layers.
For this I am planning to increase my Vref on XYZtower stepper - they are still at +-0V6.
Yep, using PLA!
I've also reduced the Acceleration and Jerk settings in the printer in order to reduce risk for layer shift at higher speeds (I think the Gcodes for doing this from within your SD card are not working)

Greetz!
Mikael

PS: do you know about the code G4 - to insert a pause? Like when you want to put a nut inside your print? -- don't use the "Lift head" option in Cura - it stalls your printer with cmd G4)
PPS: my current CuraSettings as a gift winking smiley
PPPS: I've found this a nice page and picture wondering "What is on Jerk??" - but I am not sure if it will bring me any gain grinning smiley - [en.wikipedia.org]

Edited 1 time(s). Last edit at 03/05/2017 08:54AM by MikaëlV.
Attachments:
open | download - #12.curaprofile (1.9 KB)
Re: Geeetech Rostock 301 first topic
March 08, 2017 02:40AM
Hi guys,
After years of watching I am looking at buying my first printer. The Geeetech Rostock 301 is bit pricey compared with the entry level single filament ones but I thought the extra money was probably worth it. However I see people have made quite a few mods before they got good prints. From what I have read mods and mucking around are often need with FDM printers so I was not sure if the amount of changes needed for the Rostock 301 is likely with any printer I buy, or if I should start with something different? I was also considering the Geeetech Prusa I3 M201 which is the same price, but the delta printers look like a 'cleaner' design.

I would welcome your thoughts on where to start? I am in New Zealand so Banggood is my most likely supplier.
Re: Geeetech Rostock 301 first topic
March 08, 2017 09:45AM
Being a fresh newbie myself, here what I learned in the last 3 months = my first 3 months in 3D world.
Lesson 1: Delta printers are pretty hard to level.
Lesson 2: pretty much nobody has multi color. why? because nobody masters it. All masters agree: each filament has it's own printsettings (flow, temp) - how to do that with a mix of filaments?
Lesson 3: want to print something fast: go as lightweighted with the moving parts = no Rostock 301

When you spend under 500$ you should take into account months of pleasure to finetune and tweek.
Spend up to 1000$ and you should be able to print out of the box.
Spend more: expect full support of your vendor and somtimes customized features.
Ref: [www.youtube.com]

If I would not be a doubtful guy I bought an original Prusa i3 MK2 (long waitlist has a reason!!), but a friend of mine is perfectly happy also with a Velleman 8400 - and there are many good ones out there: just find out what's a very common name in 3D print services or what printer is often used on Thingiverse etc...
Ref: [www.youtube.com]

Of course there is also much fun in multicolor - even if it is not tweeked to the full!
None of my friends can print a dragon with a skintone like a Rostock 301!! And in those 3 months I was not yet able to go into the 3mf/amf world (what was it again) = really print objects with 3 colors, so one step further than dual extrusion.
And then I also hope and pray that Geeetech makes me happy one day - and releases new SW with Gcode support for the mixer - then all hell breaks loose and we can make any color at any moment in the print - but some coding will be required to find the right places in the standard generated Gcode - again some fun!

So, summary: just remember: make a pick, don't waist your time in doubts and HAVE FUN!
Attachments:
open | download - file2.jpeg (514.7 KB)
Re: Geeetech Rostock 301 first topic
March 08, 2017 10:09AM
Hello UKODA,
Bonjour UKODA,

You can find the original text translated into English following this original French text.

Vous trouverez le texte original traduit en anglais à la suite du présent texte originale en français.

Je déconseille vivement tous les produits de la compagne Geeetech et je déconseille doublement l'imprimante 3D Rostock 301 qui ne fonctionne pas tel que livré et qui après plusieurs modifications couteuses ne fonctionnera que sporadiquement qu'avec des vitesses très lentes et des températures très élevées. Les pièces imprimées seront toujours de très mauvaise qualité. Il y a plusieurs problèmes de conception sur cette imprimante don la pointe chauffante diamant.

Je déconseille tous les produits de cette compagne du fait qu'elle ne respecte pas les droits d'auteur des licences Open Source de Marlin et ses produits sont faussement annoncés comme Open Source.

Cette entreprise se comporte comme un voyou et considère ses clients comme des personnes stupides à plumer sans gène. Ils ne répondent pas aux demandes d'aide ou d'information dans 75% des cas. Etc. leur service après-vente est toujours en sous-effectif et de compte mondialement qu’une ou deux personnes qui utilise de multiples pseudonymes pour communiquent avec ses clients.

J'ai acheté une imprimante 3D Geeetech Rostock 301 en septembre 2016 et à ce jour, je n'ai réussi aucune impression, malgré le remplacement à mes frais de plusieurs pièces de l'imprimante. Tous les acheteurs de cette imprimante ont les mêmes problèmes.

Voir l’ensemble de mes demandes d'aides et d'information et les réponses de Geeetech sur leur forum :

http://www.geeetech.com/forum/search.php?search_id=egosearch

Cordialement,

L'ami René
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Hello UKODA,

Excuse me, I am unilingual francophone and I use Google translator to translate the texts of the forum in French and to write to you in English. Thank you for your understanding and your indulgence for these texts translated mechanically!

I strongly discourage all the products of the Geeetech companion and I do not recommend double the 3D Rostock 301 which does not work as delivered and which after several expensive modifications will only work sporadically only with very slow speeds and very high temperatures. The printed parts will always be of very poor quality. There are several design problems on this printer giving the diamond heated tip.

I disadvise all the products of this companion because it does not respect the copyrights of Marlin's open source licenses and its products are falsely advertised as Open Source.

This company behaves like a thug and considers its customers as stupid people to pluck without discomfort. They do not respond to requests for help or information in 75% of cases. Etc. Their after-sales service is still understaffed and globally counted as one or two people who uses multiple pseudonyms to communicate with customers.

I bought a Geeetech Rostock 301 3D printer in September 2016 and to date I have not succeeded in printing, despite the replacement of several parts of the printer at my expense. All buyers of this printer have the same problems.

See all my requests for help and information and Geeetech's answers on their forum:

http://www.geeetech.com/forum/search.php?search_id=egosearch

Cordially,

Friend René


Un pour tous et tous pour un !
One for all and all for one !
Re: Geeetech Rostock 301 first topic
March 08, 2017 01:40PM
Thanks MikaëlV, merci L'ami René,
My wife is learning French so maybe I will test her translation skills ;-)

I don't mind doing a bit of set up work, as I know it goes with territory for the lower cost printers. However I did actually have real world things I want to print as part of other projects so I have decided to go with a simpler single colour Prusa i3 from a local supplier who can offer local support and leave the multi colour stuff for the future when I know more.

Thanks guys for the advice, much appreciated!
Re: Geeetech Rostock 301 first topic
March 11, 2017 05:33AM
Hi Ukoda.

Here is my point of view.
Multicolor is useless with 301, because of the lack of correct gcode, and another problem with that printer is the retract that leaves your prints "hairy".
The delta printer is a little trick to calibrate, but if you follow the procedure step by step, this is ok.
The 301 needs the metal extruders to run correctly, this is a complementary expense around 30$... Not really a big deal. This should be stock but...Ok.
I saw you prefered a Prusa from local dealer, good choice.
But if never you wanted a delta, I previouly owned a geetech G2S, wich worked very well, and its software was open source.
Its problem was the dual extruder tricky to calibrate... so, i would have recommanded to you the mono extruder one :
[www.banggood.com]

I think René is a bit to severe, because geeetech is a small company, trying to sell cheap Kits ... wich finally work !!!
I had a lot of pleasure in building, tunig, and finally printing with those printers.
You want an out of the box perfectly working printer ?
Just give 1220 or 1500 $, and you will got one...
With 340$, geetech sells you a nice little delta machine, and you will have fun getting it to work !

Have pleasure with your prints !
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