My first RepRap - SmartRap Core - Choosing parts November 23, 2015 01:19AM |
Registered: 9 years ago Posts: 16 |
Re: My first RepRap - SmartRap Core - Choosing parts November 23, 2015 05:06AM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 23, 2015 06:28AM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 23, 2015 07:41AM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 23, 2015 02:49PM |
Registered: 9 years ago Posts: 16 |
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Edvardas
If you get an arduino board make sure to get a 2004 screen with it. A graphic lcd makes corexy movements above 30mm/s erratic.
Re: My first RepRap - SmartRap Core - Choosing parts November 23, 2015 03:11PM |
Registered: 11 years ago Posts: 179 |
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Richard PV
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Edvardas
If you get an arduino board make sure to get a 2004 screen with it. A graphic lcd makes corexy movements above 30mm/s erratic.
Hi Edvardas,
Could you please explain me why add a LCD to the CoreXY would create an error in movements? I thought that LCD only gives a way to show information.
Also why you said that if I use an arduino board (Arduino Mega in my case). I must get a LCD 2004, it is a bad option choose LCD 12864? Why?
LCD 2004
LCD 12864
Re: My first RepRap - SmartRap Core - Choosing parts November 23, 2015 05:45PM |
Registered: 9 years ago Posts: 16 |
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J-Max
Hi Rich,
Don't be sorry, we were all newbies someday.
So, first we don't know about your budget.
Maybe sometimes the price tag decides, but you can often get much better for few more bucks.
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Q1 Colour of PCBs don't make things better or worst.
The Arduino board is under the ramps you won't be able to see it anyways.
Otherhand, over the ramps there's a forest of cables too that hides most of anything.
At a time, you will be fade up by that wiring catching anything around and will make a ventilated enclosure anyways.
A CoreXY printer can print fast (you will want that), but only with a decent board.
May I suggest a 32 bits board ? It's much simpler (All In One), quicker, and it's a better quality than cheap ramps clones.
See MKS Sbase 32bits board
Now I understand. Besides when I zoom the image of the ramps board I can see that the jumpers are also there. So they are inlcuded in the kit.Quote
Q2 In a RAMPS, the jumpers are highly recommanded, It allows to use the microstepping features or your drivers,
that smooth the motion and reduces noise.
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Q3You need heatsinks (about $0.2 each) and you need to ventilate your board (drivers and mosfet).
All the A4988 are not built the same, quality may change obviously, and output resistance (Rs) may change between 0.05 to 0.2 ohms.
The output current setup of your drivers depends of the RS value, please not S1 and S2 value before glueing the heatsinks.
Here, S1 and S2 = 100 so the Rs is 0.1 ohms. (50=0,05 ; 200=0,2 ohms)
Yeah!Quote
Q4 Definitely the 12864 is better, you can read 2 more lines which is 150% better
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Q5 The 17HS2408 don't have a lot of torque. To me it's not suitable for most applications.
I could tell it could work for this or that, but let's make it simple for you.
At last, you want a torque of 0,22Nm (32oz.in) for your motors, like with the 42SHD0503.
But to me, you'd rather go directly for high torque motors like 17HS8401,
and your motors will fit any machine in the future
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Q6Most of the plastic parts needs to be precise and will be realy complicated to be machined acurately with ordinary tools, especialy with wood.
Wood needs to be upscaled to be strong. Wood can expand and contract under moisture variations. Bad idea.
Save money. Maybe you've got a fablab near you. You can ask to a forum member near your area, or maybe you know a friend with a 3d printer.
Re: My first RepRap - SmartRap Core - Choosing parts November 23, 2015 05:52PM |
Registered: 10 years ago Posts: 14,684 |
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Richard PV
What do you think about the 17HS4401, it has 0,40 Nm (40 Nm).
Re: My first RepRap - SmartRap Core - Choosing parts November 24, 2015 01:19AM |
Registered: 9 years ago Posts: 16 |
Re: My first RepRap - SmartRap Core - Choosing parts November 24, 2015 03:02AM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 25, 2015 12:13AM |
Registered: 9 years ago Posts: 16 |
Could you please tell me if the CoreXY use a geared extruder or a direct drive (non geared extruder)? Sorry for this silly questionQuote
dc42
That motor is adequate for XYZ drive, and also for a geared extruder, but not for a direct drive (non geared) extruder. However, a motor with a rated current of about 1.3A rather than 1.7A would be a better match for cheap A4988 plug-in drivers.Quote
Richard PV
What do you think about the 17HS4401, it has 0,40 Nm (40 Nm).
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J-Max
A $200-250 budget is realy low but not impossible. A $300 budget is more comfortable.
You need to buy mostly cheap items and/or try to find or recycle as many components you can find for free. (Old PC PSU, woodframe, for example)
Obviously you can't buy parts for two printers within this budget.
It's your first attemps, keep things simple. winking smiley
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J-Max
You just need one board (and one graphic controller).
Mega+Ramps+A4988 OR an all in one 32 bits board.
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J-Max
Pay attention : the MKS Base and MKS Sbase are very different.
The MKS Base is a 16 bit all in one Mega+Ramps basic board (no drivers included).
The MKS Sbase is a 32 bit all in one board, digital dirvers included. ($200 Smoothieboard alike, the MKS Sbase is actualy the better 32 choice at low cost).
Don't say you recieved the items before to be sure it works properly.
To test electromecanics, you need a PC, a PSU, the control board, and the motors.
You should upload a firmware into the board (Smoothieware for the MKS Sbase), setup basic parameters, and run few Gcode from a host software.
While you'll be waiting forward your components, you'll have some time to learn about that.
Re: My first RepRap - SmartRap Core - Choosing parts November 26, 2015 02:40AM |
Registered: 9 years ago Posts: 16 |
Re: My first RepRap - SmartRap Core - Choosing parts November 26, 2015 05:22AM |
Registered: 11 years ago Posts: 179 |
Re: My first RepRap - SmartRap Core - Choosing parts November 26, 2015 07:26AM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 27, 2015 02:20AM |
Registered: 9 years ago Posts: 16 |
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Edvardas
Are you sure you do not want to buy a full kit from smartfriendz? That way you can be sure that you will have a working printer quickly. Sourcing all the parts yourself can be a little frustrating as they might not work well with each other. I would definatelly suggest to buy your first printer as a kit that has a good support from the seller.
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J-Max
I definitely share another point of view than Edvardas, even if I think the SmartRapCore is an interesting machine.
Actualy we're building our third SmartRapCore.
But we sourced the parts by ourselves, because it's the only way to save money while getting good components overall.
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J-Max
The two extruders you shown are the same, just colour differs. winking smiley
In the same style, you'd rather by this one, for many reasons : [www.ebay.com]
Re: My first RepRap - SmartRap Core - Choosing parts November 27, 2015 02:31AM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 27, 2015 08:08AM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 27, 2015 02:19PM |
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Re: My first RepRap - SmartRap Core - Choosing parts November 27, 2015 06:11PM |
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Re: My first RepRap - SmartRap Core - Choosing parts December 01, 2015 01:45AM |
Registered: 9 years ago Posts: 16 |
Re: My first RepRap - SmartRap Core - Choosing parts December 01, 2015 03:51AM |
Registered: 10 years ago Posts: 722 |