PeterE builds a 3d Printer

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PeterE:
Thanks for useful input both Jeff and picclock! :thumbup:

As far as I have understood from more web surfing is that this is a very common exercise when starting up a new printer. One of the important steps seems to be to set the correct type of thermistor in the Marlin h-file. The value should be set to "1" but is by default set to "0". Changing that should take the activities a bit more forward.

My measurement of about 150 Ohm should of course be 150 kOhm, missed the scale setting on the DVM :palm: sorry. thermistors = OK.

Then on top of it all, I am doing this in my garage and it is not a warm place. It probably circles bewteen 4 to 10 Degree C. This doesn't help either. Perhaps time to move the printer indoors to a warmer area for the moment :scratch:

So, time to adjust G-codes in marlin - fingers crossed ....

/Peter

picclock:
Hi PeterE

If your workshop is that cold it would be best to change the mintemp values to prevent the mintemp error. Once this error occurs the system stops completely, even though the display looks normal. They are set @5C by default, so if you changed them to 1C that may help your situation. The max temps will also probably need to be increased if you are printing Nylon. From configuration.h around line 65.

// The minimal temperature defines the temperature below which the heater will not be enabled It is used
// to check that the wiring to the thermistor is not broken.
// Otherwise this would lead to the heater being powered on all the time.
#define HEATER_0_MINTEMP 5
#define HEATER_1_MINTEMP 5
#define HEATER_2_MINTEMP 5
#define HEATER_3_MINTEMP 5
#define BED_MINTEMP 5

// When temperature exceeds max temp, your heater will be switched off.
// This feature exists to protect your hotend from overheating accidentally, but *NOT* from thermistor short/failure!
// You should use MINTEMP for thermistor short/failure protection.
#define HEATER_0_MAXTEMP 275
#define HEATER_1_MAXTEMP 275
#define HEATER_2_MAXTEMP 275
#define HEATER_3_MAXTEMP 275
#define BED_MAXTEMP 150

May I wish you swift progress.

Best Regards

picclock

PeterE:
Hi picclock,

Thanks for the info, I will include that. I got this link from a friend at another forum (model railroading in Sweden) and this instruction to set up the firmware is way superior to the one I started with:
http://solidutopia.com/marlin-firmware-user-guide-basic/

It is clear that I have simply missed a fair number of settings and I will do a recompilation. I will include your temp limits due to shop temps.

I still think the journey has been satisfying anyway. Some troubles on the way makes one learn a lot about the equipment whatever it is, and being familiar with it helps in turn to get appropriate results.

We will see where this goes.

/Peter

PeterE:
Just a small status update. A few days of other activities like a hard rock concert and a visit to some old dear frinds delayed any printer activities for two days.

Tried to use the instruction linked to above. Went from bad to worse unfortunately :bang: now the printer does not even react on connect command.

I must have set something wrong somewhere even though I ticked off the instruction step by step. I kind of get lost in those endlessrows of attributes without line breaks for each value. I may well have changed a value for another attribute because of that.

Ah well, will have another go at it this evening.

==== And the evening came ...

Got a very useful tip from my son, the computer wiz, that the things that sometimes makes files hard to read in Windows is due to lack of line breaks. There are two kinds of line breaks, the carriage Return (CR) and the Line Feed (LF), Windows only likes one of them and discards the other, so the .h-files obviously use the other :bang: There is though an OpenSource program - of course - called notepad++ that seems to be able to recognize both.

Downloaded the program and tested with one of the example files in Marlin and it becomes a whole different thing to edit files when they are readable! :ddb:

With a normal Windows Notepad it looks like this:

... and using notepad++ it looks like this

This makes ever so much easier to edit the files correctly. Must check the all the files as well. Thought it might be a useful tip.

BR

/Peter

/Peter

PeterE:
Sorry guys, this build has ground to more or less a halt due to me not being friends with either Arduino or Marlin :bang: :bang:

I dawned on me the other day that the Arduino IDE tool actually was the tool to edit the files, and then I got a whole project instead of a single file .... (I have been doing things in complete opposite manner for years. Editing a single file using a good line editor (VI) and then compiling on command line. Simple and effective, but now - noooo.

Guess how many times I have had to unzip the downloaded set of firmware files due to me mashing one file or the other up :palm:

I will get some help from my computer-knowledgeable son and that will probably help but it will delay things for longer than expected.

BR

/Peter

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