Unresolved PLA vs ABS hotend temp problem redux

A few days ago I marked a problem with ABS head temperature as SOLVED. That turned out to be premature. After finding a loose connection for the heater on the ramp card connector at D10, I though it fixed the ABS problem. Well it didn't.
The issue is the system will not hold the higher heat settings for ABS.

PLA
Head 210 C
Bed 50 C
The above works fine

ABS
Head 235 C
Bed 80 C
These settings have a problem. The bed reaches 80 okay, but while the hotend reaches 235 + a few degrees overshoot, it does not hold that temperature. It goes up to about 239 or 240 and then drops off to room temperature. If it were working correctly it would overshoot 235 by a few degrees and then settle back down to the set temperature. In this case it doesn't even try to settle at 235, it just keeps cooling all the way down.

Ideas on a fix?

Win 7, MatterControl 1.2, Robo 3D R1

 

No, this is a stock 3D R1, self leveling. I have been reading further and see that there is a limit in the firmware that is set to protect the hotends with PTFE tubes inside. I probably need to figure out if this has an all metal hotend or one with the PTFE tube in it. All I can tell you at this point is the hotend has a little fan attached to it.

 

If it has 2 fans it's an all metal hot end.

 

Okay, so if I want to do ABS I need to change the head and update the firmware? Is that about it?

 

Change the head?

But yeah update the firmware if you're getting max temp errors in terminal

 

On other posts it looks like the hotend with the PTFE can't handle the heat needed for the ABS. I said change the head, but more accurately I should say change the hotend.

All I am trying to do is be able to reach 235 C to do the ABS. If I change the firmware to be able to reach 235, will the current hotend with the PTFE tube be able to handle that?

 

Ptfe can handle up to around 245. 235 is no problem. What makes you think you have a j-head?

230 is fine for abs as well

 

Okay then all I have to do is update the firmware. I have no idea what type of head this is. I have been trying to figure that out by reading tons of posts. All I know for sure is that it has one fan and it is the stock part that came with my R1.

 

When did you get your printer? If it was before May there's a good chance it's a J-head otherwise it would be a hexagon as seen here:

 

Okay, I sent the payment for it in on Feb 23, 2014 . I think it shipped a few weeks after that so I would guess it came in Mar or Apr.

There is a grand total of 1 fan on this carriage. It is pointing at the place where the nozzle contacts the work piece. In the image you supplied above it would be the "parts fan".

So what can I call this? J head or something else?

 

Woo Hoo... Now at least I know what I am dealing with. Before trying to update the firmware I will try ABS at 230 and see if I can get that to work.

Thanks for the help.

 

Okay, 230 isn't high enough. It looked like it wanted to extrude okay but it stopped extruding somewhere around 10 seconds after starting to print. When removing the ABS filament, the gear thing had chewed half way through it. It looks like it will need to be just a little hotter.

Where can I find the firmware for this particular machine that will allow it to get up to 240? I will also need the tools to upgrade the firmware.

Again it's an early Robo 3D R1 with a J-head and auto leveling.

 

If you're stopping extruding that early it sounds like you're too low.

e: http://help.robo3dprinter.com/Wiki/RoBo_3D_Firmware firmware

 

Thanks Mark... Got the tools installed. Now to find the firmware for this machine.

 

http://help.robo3dprinter.com/Wiki/RoBo_3D_Firmware firmware, nonautolevel.

Don't fry your PTFE tube going too hot. 240 is really pushing it.

 

I'll try 235 first, thanks.

I found Marlin Firmware (10/9/13)

Is this what need?