Re: FLSUN from AliExpres January 23, 2017 12:00PM |
Registered: 10 years ago Posts: 14,672 |
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Gordon W
Grateful for all advice and suggestions - I am quite new to this metier - but I have a reasonable background in machine automation. When the MINTEMP error first occurred I checked the connections and seating. It re-occurred so I replaced the thermistor and cable. It recurred - but only on long infills - say a raft for a 180 mm circle. I saw that as the head approached the brim the display would dim; sometimes it would not extrude properly; and sometimes it would MINTEMP. It only occurs when the bed is heated as well. I have concluded (admittedly from a limited knowledge base) that the power available was less than required. So it is fixed to the extent that it can be avoided if the bed is not heated or I don't try large infills. I've found this printer works well for about 30% of the theororetical build area (i.e. up to about 100mm diameter). I'm thinking of either power the heated bed separately (having the arduino outputs switch a relay instead of powering the heated bed. Or buying a more robust controller.
Regards
Gordon
Re: FLSUN from AliExpres January 23, 2017 07:54PM |
Registered: 8 years ago Posts: 17 |
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spinor
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The printer sounds quite mechanical and it's noticeably louder than my prusa. My guess is that it's motor tuning and belts too tight.
But this is minor and having come from CNC and Prusa printers the delta killed my brain. I don't think I could've got it working without your work.
My flsun was also noisy, so I printed these stands and put the printer on them. Couldn't believe how much quieter it became. For a moment I actually thought I had developed a hearing problem! It wobbles a bit during printing, but that doesn't seem to cause any issues.
Re: FLSUN from AliExpres January 24, 2017 04:24AM |
Registered: 8 years ago Posts: 17 |
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Gordon W
Grateful for all advice and suggestions - I am quite new to this metier - but I have a reasonable background in machine automation. When the MINTEMP error first occurred I checked the connections and seating. It re-occurred so I replaced the thermistor and cable. It recurred - but only on long infills - say a raft for a 180 mm circle. I saw that as the head approached the brim the display would dim; sometimes it would not extrude properly; and sometimes it would MINTEMP. It only occurs when the bed is heated as well. I have concluded (admittedly from a limited knowledge base) that the power available was less than required. So it is fixed to the extent that it can be avoided if the bed is not heated or I don't try large infills. I've found this printer works well for about 30% of the theororetical build area (i.e. up to about 100mm diameter). I'm thinking of either power the heated bed separately (having the arduino outputs switch a relay instead of powering the heated bed. Or buying a more robust controller.
Regards
Gordon
Re: FLSUN from AliExpres January 24, 2017 06:24AM |
Registered: 7 years ago Posts: 35 |
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tablefx
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spinor
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The printer sounds quite mechanical and it's noticeably louder than my prusa. My guess is that it's motor tuning and belts too tight.
But this is minor and having come from CNC and Prusa printers the delta killed my brain. I don't think I could've got it working without your work.
My flsun was also noisy, so I printed these stands and put the printer on them. Couldn't believe how much quieter it became. For a moment I actually thought I had developed a hearing problem! It wobbles a bit during printing, but that doesn't seem to cause any issues.
I'll definitely print those stands, they look like a great addition.
I can feel the mechanical vibration (holding the printer in two hands in the air) and the noise of the steppers doesn't sound right (when compared to the same steppers on the prusa. Once I tune them and adjust belt tension I'll post back any gains, if any, that I get.
Re: FLSUN from AliExpres January 26, 2017 04:05PM |
Registered: 7 years ago Posts: 4 |
Re: FLSUN from AliExpres January 27, 2017 05:58AM |
Registered: 8 years ago Posts: 17 |
Can't achieve accurate probing - adjust probing precision upward
READ: z-Height: 284.73 Ex:0.00 Ey:-0.05 Ez:-0.38 READ: Radius: 102.89 READ: Calibration OK - to save these settings use M500
Re: FLSUN from AliExpres January 27, 2017 08:19AM |
Registered: 8 years ago Posts: 17 |
Re: FLSUN from AliExpres January 27, 2017 11:46AM |
Registered: 7 years ago Posts: 4 |
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Gordon W
When it is printing long infills on a heated bed with the LCD operating, sometimes it will stop with a MINTEMP error. I suspect there is a problem either with the power supply being too weak or the motherboard (Arduino based) not having sufficient capability.
Re: FLSUN from AliExpres January 27, 2017 06:29PM |
Registered: 7 years ago Posts: 4 |
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LVD
This should get rid of the errors - and uncomment #define SDSUPPORT in configuration.h
Re: FLSUN from AliExpres January 28, 2017 01:16PM |
Registered: 8 years ago Posts: 165 |
Re: FLSUN from AliExpres January 30, 2017 12:47AM |
Registered: 8 years ago Posts: 17 |
Can't achieve accurate probing - adjust probing precision upward
Re: FLSUN from AliExpres January 30, 2017 09:47AM |
Registered: 8 years ago Posts: 165 |
Re: FLSUN from AliExpres January 30, 2017 01:53PM |
Registered: 7 years ago Posts: 2 |
Re: FLSUN from AliExpres February 02, 2017 01:42PM |
Registered: 7 years ago Posts: 1 |
Maybe you have a message on the LCD "Waiting for user..."?Quote
tpichierri
Hey guys! So I have this printer, and its giving me some problems.
I'm using the Marlin-AC firmware. With the previous firmware (Marlin) it worked OK, but with this one the hot end get to the bed, and when it comes to the config temp (200 C), it wont start printing. It stays there... forever (?).
Can anyone help me with this? Its driving me mad.
Thanks!!
Re: FLSUN from AliExpres February 02, 2017 01:54PM |
Registered: 7 years ago Posts: 2 |
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Aamo
Maybe you have a message on the LCD "Waiting for user..."?Quote
tpichierri
Hey guys! So I have this printer, and its giving me some problems.
I'm using the Marlin-AC firmware. With the previous firmware (Marlin) it worked OK, but with this one the hot end get to the bed, and when it comes to the config temp (200 C), it wont start printing. It stays there... forever (?).
Can anyone help me with this? Its driving me mad.
Thanks!!
Press the button.
Re: FLSUN from AliExpres February 09, 2017 06:52AM |
Registered: 8 years ago Posts: 17 |
Re: FLSUN from AliExpres February 13, 2017 12:56PM |
Registered: 7 years ago Posts: 5 |
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If the display is dimming then the 5V rail is not stable. Does your printer have a graphical LCD or a servo attached? If so, this is a common problem (system design fault) with Arduino/Mega/LCD-or-servo setups. An electronics upgrade will indeed fix it, but it is not the only way. See [reprap.org]. It's just possible that the 12V supply is the problem (and it dropping enough that the 5V rail dips in turn), but it's more likely to be the 5V regulator.
Re: FLSUN from AliExpres February 13, 2017 03:28PM |
Registered: 8 years ago Posts: 165 |
Re: FLSUN from AliExpres February 13, 2017 05:31PM |
Registered: 10 years ago Posts: 14,672 |
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Gordon W
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If the display is dimming then the 5V rail is not stable. Does your printer have a graphical LCD or a servo attached? If so, this is a common problem (system design fault) with Arduino/Mega/LCD-or-servo setups. An electronics upgrade will indeed fix it, but it is not the only way. See [reprap.org]. It's just possible that the 12V supply is the problem (and it dropping enough that the 5V rail dips in turn), but it's more likely to be the 5V regulator.
Hi
Thanks for your help. I am now more certain that there is a power supply problem. I bought some PrintBite (which is a wonderful product BTW) and the installation required heating the bed to 110 - I couldn't get it to go past 90. And then when I tried to print with a bed temperature of 65, I couldn't get the extruder temperature above 200. Do you think using a separate power supply for the bed heater might be a step in the right direction (using the current bed outputs to only drive a relay)?
Regards
Gordon
Re: FLSUN from AliExpres February 14, 2017 08:49AM |
Registered: 7 years ago Posts: 5 |
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dc42
It's very common for cheap 3D printer kits to have under-powered PCB bed heaters. Also if it uses RAMPS electronics then it probably has the usual poorly-specified mosfet, made worse by the problem of your 5V regulator being overloaded and giving less than 5V. Unless you want to spend significant money on better electronics,
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dc42
I suggest you proceed as follows:
1. Use a multimeter to check the voltage on the 5V rail, to verify that you have a problem with the regulator overheating. If it isn't at least 4.75V and stable, you have that problem. See the link I gave you previously.
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dc42
2. After you have fixed the 5V supply, if the bed heater mosfet is still getting hot (not merely warm), replace it by a better type.
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dc42
3. If you are getting significant voltage drop between the power supply and the electronics bed power input, or between the bed heater output and the bed heater, use thicker wires.
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dc42
4. After that, if you are still short of heating power, then you can turn up then power supply voltage if the power supply has enough spare power capacity.
Re: FLSUN from AliExpres February 14, 2017 11:49AM |
Registered: 10 years ago Posts: 14,672 |
Re: FLSUN from AliExpres February 14, 2017 01:18PM |
Registered: 7 years ago Posts: 5 |
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dc42
So #1 and #2 are OK, #3 could use a little improvement but isn't too bad. For #4, what sort of power supply are you using? If it's a PC power supply, you can't easily adjust the voltage. If it's a typical 12V Chinese PSU with a row of terminal blocks at one end, some for mains input and the others for outputs, there is usually a potentiometer at one end of the terminal block for adjusting the voltage. Turning it up to 14V will give you 36% more heating power. This applies to the hot end too, so you may need to auto tune again. The 12V fans are normally OK at 14V although ideally you should connect a couple of 1n4001 or similar diodes in series with them to drop the voltage back to 12V.
All this assumes that the MKS board is happy with the voltage increased to 14V. It probably is, but I haven't seen the specifications for it.
Re: FLSUN from AliExpres March 19, 2017 02:07PM |
Registered: 8 years ago Posts: 165 |
Re: FLSUN from AliExpres March 25, 2017 06:48AM |
Registered: 7 years ago Posts: 7 |
Re: FLSUN from AliExpres March 26, 2017 11:49AM |
Registered: 7 years ago Posts: 3 |
Re: FLSUN from AliExpres March 27, 2017 10:25AM |
Registered: 7 years ago Posts: 7 |
Re: FLSUN from AliExpres March 27, 2017 11:21AM |
Registered: 7 years ago Posts: 3 |
Re: FLSUN from AliExpres March 30, 2017 04:21AM |
Registered: 8 years ago Posts: 165 |
Re: FLSUN from AliExpres March 30, 2017 04:56AM |
Registered: 7 years ago Posts: 7 |
Re: FLSUN from AliExpres March 30, 2017 02:38PM |
Registered: 8 years ago Posts: 165 |