Gen7 20MHz running Marlin firmware? Is there anyone out there running Marlin firmware on 20MHz Gen7 electronics? Does it work, any problems/limitations? https://reprap.org/forum/read.php?181,177170,177170#msg-177170 Sun, 13 Sep 2026 04:01:05 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?181,177170,221638#msg-221638 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,221638#msg-221638 zungmann Next Wave Electronics Working Group Wed, 26 Jun 2013 01:34:38 -0400 https://reprap.org/forum/read.php?181,177170,218293#msg-218293 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,218293#msg-218293
Extruder heater and its thermistor work, heatbed thermistor still shows zero temp but heater LED light goes on and off at command (after MOSFET replacement).

M114 reports position changes on all axis except it doesnt report homing movement on X.

Strange enough, motors were working fine until i replaced burnt out MOSFET.
Now they dont work at all. Not in Marlin and not in Teacup also.]]> len24 Next Wave Electronics Working Group Fri, 14 Jun 2013 11:26:12 -0400 https://reprap.org/forum/read.php?181,177170,218201#msg-218201 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,218201#msg-218201 Traumflug Next Wave Electronics Working Group Fri, 14 Jun 2013 06:06:10 -0400 https://reprap.org/forum/read.php?181,177170,217657#msg-217657 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,217657#msg-217657
For me, this marlin firmware is like a pandoras box.]]> len24 Next Wave Electronics Working Group Wed, 12 Jun 2013 07:50:24 -0400 https://reprap.org/forum/read.php?181,177170,211674#msg-211674 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,211674#msg-211674
Quote

Heater off 0V

Heater on 5V

Then your MOSFET is damaged and needs replacement. Next time you experiment with firmware, please disconnect the load (heated bed) until you see the LEDs working as expected.

... and I guess Gen7 v1.6 gets a pull-down resistor for those few minutes in its life it runs without proper firmware.]]> Traumflug Next Wave Electronics Working Group Fri, 24 May 2013 06:54:25 -0400 https://reprap.org/forum/read.php?181,177170,211372#msg-211372 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,211372#msg-211372
Heater on 5V]]> len24 Next Wave Electronics Working Group Thu, 23 May 2013 09:23:37 -0400 https://reprap.org/forum/read.php?181,177170,211295#msg-211295 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,211295#msg-211295
Quote

I did measure and it is.

It is what? 0V or 5V or does it change depending on the G-code sent? In case it's always 5V it might be a burned ATmega pin. You can try to use one of the remaining pins. Requires cutting the regular track on the PCB, the re-soldering it to the new pin.]]> Traumflug Next Wave Electronics Working Group Thu, 23 May 2013 07:00:20 -0400 https://reprap.org/forum/read.php?181,177170,211043#msg-211043 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,211043#msg-211043 -------------------------------------------------------
> Can you measure the voltage on R11/R12? Doesn't
> matter which side of it. It should be 0V with
> heater off, 5V with heater on.

I did measure and it is.


> If that happens, but the LED still doesn't light, the MOSFET needs
> replacement.

As soon as i connect in repetier host bed heater LED is on.
Doesn´t matter if the heater is on/off, it just always stays lit.]]> len24 Next Wave Electronics Working Group Wed, 22 May 2013 10:35:09 -0400 https://reprap.org/forum/read.php?181,177170,210292#msg-210292 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,210292#msg-210292
You could also use SetupTest.ino to check the MOSFETs. Very simple to configure, see the first lines of its source code.]]> Traumflug Next Wave Electronics Working Group Mon, 20 May 2013 06:33:28 -0400 https://reprap.org/forum/read.php?181,177170,210201#msg-210201 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,210201#msg-210201
Didnt mess with pins.h, uploaded and now extruder heater and thermistor is working, but no such luck with heatbed (still zero, no matter which thermistor i chose from the list).

Still wondering what went wrong with previous upload?
Did everything per instruction except, when i now cross reference config.h, swapped 0 and 1 pin in temps....]]> len24 Next Wave Electronics Working Group Sun, 19 May 2013 21:56:46 -0400 https://reprap.org/forum/read.php?181,177170,210063#msg-210063 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,210063#msg-210063 len24 Next Wave Electronics Working Group Sun, 19 May 2013 12:45:19 -0400 https://reprap.org/forum/read.php?181,177170,210047#msg-210047 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,210047#msg-210047 In fact, even when i upload teacup heater led is lit up.

Oh dear, have gotten myself in deep trouble.]]> len24 Next Wave Electronics Working Group Sun, 19 May 2013 12:05:52 -0400 https://reprap.org/forum/read.php?181,177170,210001#msg-210001 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,210001#msg-210001
Quote

Just now i have noticed that HPB heater led lights up and IRLB8743 is smoking !

You managed to get this fat MOSFET smoking? That means you hooked up a bed before checking wether the MOSFET is working.

I'd guess your pinout is wrong. The MOSFET I/O pin isn't served at all by the ATmega, accordingly the voltage on this pin is floating. You should ensure the LED lights up in accordance to the heater commands given (M140 S80 vs. M140 S0). If that works, hook up the bed.]]> Traumflug Next Wave Electronics Working Group Sun, 19 May 2013 07:24:44 -0400 https://reprap.org/forum/read.php?181,177170,209958#msg-209958 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,209958#msg-209958
Thought it would work right away.

Think its burned out, unusable? Right now not sure how i would get thermistors working..but that is my goal.]]> len24 Next Wave Electronics Working Group Sat, 18 May 2013 23:10:07 -0400 https://reprap.org/forum/read.php?181,177170,209957#msg-209957 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,209957#msg-209957
But I'd be more worried about that smoking mosfet. You'll need to replace that, for starters. Get the thermistors working before you do anything else.]]> Andrew Smith Next Wave Electronics Working Group Sat, 18 May 2013 23:01:06 -0400 https://reprap.org/forum/read.php?181,177170,209951#msg-209951 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,209951#msg-209951
Just now i have noticed that HPB heater led lights up and IRLB8743 is smoking ! Temperatures still zero.

Besides that, dont understand why extruder motor isnt working.]]> len24 Next Wave Electronics Working Group Sat, 18 May 2013 21:55:26 -0400 https://reprap.org/forum/read.php?181,177170,209941#msg-209941 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,209941#msg-209941 Phizinza Next Wave Electronics Working Group Sat, 18 May 2013 20:44:14 -0400 https://reprap.org/forum/read.php?181,177170,209920#msg-209920 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,209920#msg-209920
I have managed to upload firmware (Arduino 1.0) after coil change, and everything seems to work except thermistors (temperature is 0), heaters and extruder motor.

My specs:

-Gen7 1.41 with ATmega 1284p 20MHz
-Optical endstops

Thank you in advance.]]> len24 Next Wave Electronics Working Group Sat, 18 May 2013 18:03:22 -0400 https://reprap.org/forum/read.php?181,177170,189345#msg-189345 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,189345#msg-189345 Phizinza Next Wave Electronics Working Group Sun, 03 Mar 2013 20:01:32 -0500 https://reprap.org/forum/read.php?181,177170,189120#msg-189120 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,189120#msg-189120 Traumflug Next Wave Electronics Working Group Sun, 03 Mar 2013 06:43:03 -0500 https://reprap.org/forum/read.php?181,177170,189031#msg-189031 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,189031#msg-189031
Any idea where I have gone wrong?]]> Phizinza Next Wave Electronics Working Group Sat, 02 Mar 2013 20:18:03 -0500 https://reprap.org/forum/read.php?181,177170,180393#msg-180393 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,180393#msg-180393
First issue is the define temp sensors section.
I am to assume temp sensor 0 is the hot end on my gen7 board?
The thermistor I used on my heat bed is not in the list. Do I just have to add the table to the thermistortables.h as another number and then choose that number in configuration.h for the temp_sensor_bed?

Next endstops...
I only use the min endstops on my gen7, do I comment out the define endstoppullup max options?
Why is the min endstop for Z axis already commented out?

Thanks!]]> Phizinza Next Wave Electronics Working Group Tue, 29 Jan 2013 22:30:15 -0500 https://reprap.org/forum/read.php?181,177170,177476#msg-177476 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,177476#msg-177476
I'm using a 1.3.1 board but I suppose I could upgrade..]]> Phizinza Next Wave Electronics Working Group Fri, 18 Jan 2013 03:55:12 -0500 https://reprap.org/forum/read.php?181,177170,177212#msg-177212 Re: Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,177212#msg-177212 Yes I do;
There are some points you have to consider to get it running :
- Use the GEN7 Arduino files which come with Marlin (otherwise you'll get compile errors)
- Till Gen7 v1.4.1 there is a hardware issue (wrong coil was used) which might lead to brown-outs. You could either change L1 from 100uH to an 10uH coil , or try to set your brown out detection from 4,3V to 2,7V. Both solutions worked in my case. (Gen7 v1.4.1)


In my case I haven't noticed any other limitations with marlin.]]> scuba Next Wave Electronics Working Group Thu, 17 Jan 2013 03:32:16 -0500 https://reprap.org/forum/read.php?181,177170,177170#msg-177170 Gen7 20MHz running Marlin firmware? https://reprap.org/forum/read.php?181,177170,177170#msg-177170
Does it work, any problems/limitations?]]> Phizinza Next Wave Electronics Working Group Wed, 16 Jan 2013 22:21:53 -0500