few question before turning on the printer May 28, 2014 01:11PM |
Registered: 10 years ago Posts: 80 |
Re: few question before turning on the printer May 28, 2014 08:52PM |
Registered: 10 years ago Posts: 62 |
Quote
EEstudent
Hi All,
Finally I got all things I needed, tomorrow I will connect the wires and plug it into power.
1. where I should put the end stops?what is there purpose?shout their position be accurate?It has 4 wires but on the scheme of RAMPS there are only 2 for each endstop, how should i wire them? (there are 2 ground wire,one for VCC and one for signal)
2. I will be using Marlin firmware, is it recommended? what should I change in the configuration file?
3. I will also be using slic3r and Printrun , any other recommendation?
4. is there any good tutorial for calibrating the printer?
5. a general guidelines would help
6. I am considering to document the process somewhere, where you want to see it?
Morad
Re: few question before turning on the printer May 29, 2014 09:32AM |
Registered: 10 years ago Posts: 80 |
Re: few question before turning on the printer May 29, 2014 12:19PM |
Registered: 10 years ago Posts: 80 |
Re: few question before turning on the printer May 29, 2014 08:49PM |
Registered: 10 years ago Posts: 62 |
Re: few question before turning on the printer May 30, 2014 09:12AM |
Registered: 10 years ago Posts: 80 |
Re: few question before turning on the printer May 30, 2014 09:43AM |
Registered: 10 years ago Posts: 80 |
Quote
Opus
Quote
EEstudent
Hi All,
Finally I got all things I needed, tomorrow I will connect the wires and plug it into power.
1. where I should put the end stops?what is there purpose?shout their position be accurate?It has 4 wires but on the scheme of RAMPS there are only 2 for each endstop, how should i wire them? (there are 2 ground wire,one for VCC and one for signal)
2. I will be using Marlin firmware, is it recommended? what should I change in the configuration file?
3. I will also be using slic3r and Printrun , any other recommendation?
4. is there any good tutorial for calibrating the printer?
5. a general guidelines would help
6. I am considering to document the process somewhere, where you want to see it?
Morad
- The end stops are essential, they tell the printer when it's at it's home position. They should be set so the X and Y get triggered at when the print head is at corner of the bed, and the Z stop when the print head is where you want the first layer to go down. You've got a lot of leeway on X/Y, too far into the print area and you'll limit your print size, outside the print area and you'll spew plastic into space. The Z stop needs to be very accurate, it defines the thickness of the first layer of your print and needs to be calibrated to tiny fractions of a millimeter. If you haven't got one, get an adjustable Z stop holder, this lets you turn a screw to move the position of the z carriage rather than having to move the actual switch, and makes life much much easier
I've only got 3 connectors for the end stops on my RAMPS board. With only 2 wires on the endstop switches you'll want those on the "normally open" pins, which are the top ones (from memory, you'll need to check)
- Marlin works fine for me. You'll have to configure it to tell it where the end stops are, and that they're normally open (in configuration.h) down where it says const bool X_MIN_ENDSTOP_INVERTING = true; I think true is what you'll need, but again, you'll have to test and make sure for your particular hardware and layout.
- I use Slic3r and Repetier Host, only reason is that it's the first thing I tried and does everything I need so far
- Google TriffidHunters calibration guide, it's a fine start
- When you first start moving your motors, hover your mouse over the emergency stop button, and hit that the minute anything looks wrong. As you set up the end stops you'll probably end up bashing things into your frame a few times by accident, and it makes a horrible noise
Re: few question before turning on the printer May 31, 2014 05:00AM |
Registered: 11 years ago Posts: 973 |
Re: few question before turning on the printer June 01, 2014 03:50PM |
Registered: 10 years ago Posts: 80 |
Re: few question before turning on the printer June 01, 2014 06:16PM |
Registered: 10 years ago Posts: 80 |
Re: few question before turning on the printer June 02, 2014 09:29PM |
Registered: 10 years ago Posts: 62 |
Re: few question before turning on the printer June 03, 2014 04:02AM |
Registered: 10 years ago Posts: 80 |
I guess it really was wrong reading of the temp.Quote
Opus
I'm guessing that j-head got a lot hotter than 170C (or you got a very faulty one) I've was running mine at 195C with no problems for ages. The thermistor would be the first culprit, check it's properly seated in the head, and the right type set up in the firmware. Grab yourself a thermocouple sensor (they're only $25 from China) and it'll tell you what the actual temperature is compared to what the thermistor is reporting. You shouldn't need a fan on the J-head for PLA at 170. It's only melted right at the bottom so it doesn't need cooling up the barrel.
Great to see it printing though!
Re: few question before turning on the printer June 03, 2014 09:11PM |
Registered: 10 years ago Posts: 62 |
Re: few question before turning on the printer June 04, 2014 05:26AM |
Registered: 10 years ago Posts: 80 |
I've ordered something like that.Quote
Opus
Try something like this. You just stick the metal end into the hot end somewhere, and it'll read the actual temperature. I don't know exactly how accurate these cheap versions are, but it'll give you a good starting point to calibrate your thermistor