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| PeterE builds a 3d Printer |
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| picclock:
Hi Peter FWIW the presets on my boards are far from 'linear'. The max current on mine is 2.5A, with 0.1 ohm resisters that corresponds to 1.25v top end. But the pot range is 0 to 3.3v. I think I read the pots for your drivers work the wrong way round, clockwise to decrease current. Two things that may help. When it powers up the motors are disabled. Sending a home command or a motors on (M17) should sort it. Commands are listed http://reprap.org/wiki/G-code - not all are supported by Marlin. Best Regards picclock |
| PeterE:
Aha, thanks picclock! :thumbup: Always tricky when having different suppliers. The G-code command list for Marlin is super! The descriptions I use works very well and there are basically no differences from when they were written till today, but... something kind of tells me that the later verwsions of Pronterface and Marlin have been enhanced and nowadays include more functions than at the time of writing. :scratch: The "new" function for adding separate fans for double extruders is one of them. I simply have to use the descriptions as a base and go from there. It may just be that I have to connect the two thermistors to get on with the settings. More to do today. /Peter |
| PeterE:
This is annoying :bang: From getting error 0 which is equal to no thermistor connected, to now get error MAXTEMP instead! :scratch: Having read through a bunch of googled pages it seems to circle around the default setting of thermistor type in the Marlin firmware. As said it is set to type 0 but should be set to type 1. Also took the time to check the resistance and both was around 150 Ohm as measured. They are of type 100kOhm and that seems right so far. The annoying thing is that I cannot proceed with the movement settings until these temp errors are fixed as the firmware shuts the board down for safety sake :bang: Oh well, there is a day tomorrow as well. I will win over this one as well - some day. BR /Peter |
| chipenter:
You can change to cnc router in printer settings that will disable the temp and extruder to check movement . I should have said in Repetier Host . |
| picclock:
Hi PeterE Resistance of the thermisters at room temp should be around 100k @ 25C. If it is showing too hot likely a short, too cold likely open circuit. 150 ohms is too low and 150k too high unless its really cold where you are :-). If ambient is below 5C Mintemp error occurs and system stops. You will need to repower the system to restart. Are you disconnecting the thermisters to read the value?. If they are still connected you will get a low reading. Best to try to sort this - it will have to done at some time, but if you get desperate, assuming you are using Marlin RC1_3, it can be fooled for debug purposes by enabling the following in configuration.h (around line 146 - just remove the forward slashes) #define DUMMY_THERMISTOR_998_VALUE 25 #define DUMMY_THERMISTOR_999_VALUE 100 Obviously recompile and upload when done. Are you going to use auto bed levelling?. I have been looking at the servo type for mine, where it will take measurements in different bed positions and adjust the head height accordingly. Good luck with the fault finding. Best Regards picclock |
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