Can't print test pieces June 15, 2015 12:00PM |
Registered: 8 years ago Posts: 11 |
Re: Can't print test pieces June 15, 2015 01:40PM |
Registered: 10 years ago Posts: 665 |
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shauna
The hot end doesn't always heat up and when it does the printer moves as if was printing but it does not extrude anything.
Re: Can't print test pieces June 16, 2015 06:15AM |
Registered: 8 years ago Posts: 11 |
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zombiepantslol
You must select the first tool by sending "T0" first before you can heat up and extrude any filament. Also see [reprappro.com]
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zombiepantslol
If your nozzle takes a long time to heat up, the easiest way to speed it up would be to increase the 'S' term via M301. You could try this out by sending M301 S1.1 which will increase the heater output by 10%.
Re: Can't print test pieces June 16, 2015 06:26AM |
Registered: 10 years ago Posts: 665 |
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shauna
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zombiepantslol
You must select the first tool by sending "T0" first before you can heat up and extrude any filament. Also see [reprappro.com]
I did have the tool selected with all my original problems.
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shauna
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zombiepantslol
If your nozzle takes a long time to heat up, the easiest way to speed it up would be to increase the 'S' term via M301. You could try this out by sending M301 S1.1 which will increase the heater output by 10%.
This made the hot end heat up slightly faster initially but as it gets closer to its target temperature it slows down and doesn't ever reach it. I've also tried increasing the heater output to higher percentages such as M301 S1.2, M301 S1.3 etc. with the same result.
Do you think it might be a temperature sensing problem rather than a heating problem?
Re: Can't print test pieces June 16, 2015 07:50AM |
Registered: 13 years ago Posts: 1,611 |
Re: Can't print test pieces June 25, 2015 09:57AM |
Registered: 8 years ago Posts: 11 |
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droftarts
Hi shauna
We've had a couple of people report this problem, since the v1.09 firmware update. The PID values (which control the heating) were changed. Generally, this is okay - we tested in house, and didn't see any problems. But if there is something not working quite correctly, it can cause the heater to take too long to heat up. It tends to hit the temperature about 10C below target quickly, then creep slowly up to the target.
There's a couple of things you can check, and do, to overcome this:
1. Check your heater is fully in the heater block, and the thermistor is too. Do you have a fan blowing on the heater block? This may cause it to take longer to heat up.
2. Check the resistance of your heater cartridge. It should be around 3 ohms. If it's higher, it will take longer to heat up.
3. Probably the easiest thing to do is to revert to the settings we used in firmware 1.04. with the hot end cold, send:
M301 H1 P20 I0.5 D100
Heat up the hot end, and see how it responds. If it works better, please let me know. If it overshoots the temperature by a long way, like 10C, reduce the 'P' value to 15; send:
M301 H1 P15 I0.5 D100
You can also add this to your config.g to make it permanent.
4. You can increase the heater timeout with M570, see: [reprap.org]
There is also a thread on the forum about this problem; see: [forums.reprap.org]
Ian
RepRapPro tech support