Any experience ramps kit form china(ramps + 4 driver + mega clone)?

3D Printing
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1

Any experience ramps kit form china(ramps + 4 driver + mega clone)?
My friend in china can sell it for 68 $ shipping tracked included

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Can’t tell if this is advertisement/spam or an honest question… insert Fry meme here
Anyways, the Chinese stuff i’ve been using has all been holding up very well - just check for poor soldering and shipping defects before you plug it in. $68 sound like a fair price, too.

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Is not spam…but want know if anyone have some real experience of china ramps board
know fine clone of ardunino but not from ramps… thanks for suggest…currently i don’t buy it …search real experience .
thanks too much for your suggestion.

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I’ve specifically been using Chinese Arduino Mega Clones and $3 Geeetech drivers successfully, and since the RAMPS really isn’t much more than an electrical adapter and a handful of simple components, i don’t see how anything could go wrong with that.

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I’ve had very good experiences with my @SainSmart RAMPS 1.4, but it came without the jumpers to enable 1/16 microstepping. I’ve heard nothing but good things about other people ordering from them as well. I haven’t tested out their filament. I’ve looked on http://aliexpress.com for RAMPS boards, and they’re very close to the same price but sainsmart has the feedback that allowed me to trust them (which was barely, but is now moderately).

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Actually, most kits already come from China one way or the other. I never had any issues.

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Thanks for sharing experience.

I have fortune to have good friend localy ask to check solder quality before buy it (juper for enable microstep is not really problem)

for filament from china is heavy and shipping cost more of item(and need wait 4 week for delivery in italy) .

Thanks again , hope to take it soon :slight_smile:

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+Peter van der Walt i don’t know if they still do it, but they used to have sales on Fridays where some items would be massively discounted.

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@Thomas_Sanladerer thanks to suggest geeetech(don’t know this site…) currently have printrboard at 40$ is really really good price. but no like it because drivers are embedded…

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@Thomas_Sanladerer I don’t see $3 drivers at Geeetech .

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I’ve had a good service and experience from reprepdiscount on eBay. But I brought the stepper drivers with it so it was more than 68.

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I’m still waiting for my SainSmart to arrive. @ThantiK , can you give some pointers on how to enable 1/16 stepping ?

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@Shachar_Weis , under each of the drivers, there are 3 set of 2 pins - these are MS1, MS2, and MS3 on the drivers; – Simply jumper all of them. If you don’t, the drivers will default to full-step mode, which is loud, noisy, jerky and terrible.

The A4988 and the DRV8825 have 100kohm and 50kohm pull down resistors, so they’re held low unless a 5v signal is applied. You can find the charts here for the DRV8825: http://www.pololu.com/catalog/product/2132

And here for the A4988: http://www.pololu.com/catalog/product/1182

You want HIGH, HIGH, HIGH in order to enable the highest resolution microstepping. The higher the microstepping, the smaller the steps your motor makes (more precise), and the quieter it is. 1/32 stepping from the DRV8825s is really nice.

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I wasn’t familiar with Ge Tech either. In fact they have the RAMPs/mega/drivers on sale for 65 bucks :slight_smile: http://www.geeetech.com/iduino-mega2560-ramp-14-extend-shield-a4988-stepper-driver-p-662.html

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geeetech is kind of hated amongst most of the community I hang out with. They ripped sparkfuns site line for line…

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@ThantiK thanks. So the default is 1/16 and with all the jumpers it’s 1/32 ? I wonder why it comes not jumpered by default ?

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Nah, default is no microstepping. The A4988s have a max of 1/16, the DRV8825’s have a max of 1/32; most printers have the A4988 drivers as the DRV8825s are rather new.

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Gotcha.

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Do you think it worth the upgrade to DRV8825 ?

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@ThantiK Didn’t know about the Sparkfun ripoff, good to know