March 23, 2017 at 14:49 #5546
what do you mean by // IO pin. Buffer needed
A fan load would be far less than a hotend !March 23, 2017 at 17:52 #5547
how many fans do you have?
what are they for?
How many hotends do you have?
Do you have a hotbed?March 23, 2017 at 21:25 #5549
1 12v fan to cool the extruder feed throte. It’s connected to the 2nd extruder out put. 1 extruder connected to the 1st connector and yes a hbp
This may make it a bit clearer
March 23, 2017 at 21:58 #5551
- This reply was modified 6 months, 4 weeks ago by Suggy.
Don’t know what happened to the link but this is trying again
Looking at this link
I think it should be pin 9?
Still don’t know what if anything in pins.h to changeMarch 23, 2017 at 22:20 #5554
Tried 9 and get compilling error (think 9 is hoe end)
Tried 8 and it compiles ok
Do you think I’m safe to upload and try without causing any damage?March 24, 2017 at 00:18 #5555
you are not giving me all the answers – so I can’t help you.
u have at least 2 fans by the pics.
you didn’t mention the stepper driver fan so I assume it is hardwired.
u can’t program the model fan as a model fan and a temp controlled hotend fan
If u want that hotend fan to be temp controlled you need to use a different pin with a buffer like I am doing. But I have not configd it as temp controlled yet.
u are already using pins 8,9,&10. EFB which are all the buffered pins.
If your extruder fan is also your model fan you will have issues. U need a separate fan connected to a buffered output.
the error is because that pin is already in use by a fan or you are trying to do 2 things at once with the model fan. U can probably configure that as temp controlled fan but right off hand don’t know.
normally I would try to figure that out for u, but I have a SEVERE neck pain and am surprised I am even answering u.March 24, 2017 at 07:12 #5568
The cooling fans for the drivers are hard wired. I now know what EFB is now you have explained this to me. E=Extruder, F=Fan as in filament cooling, B=HBP.
I thought it was E=Extruder, F=Fan as in extruder throat fan, B=hBP.
I will change it back to a -1, Hard wire the extruder fan (I plan to fit a model cooling fan as well, so just need to change the wiring) as for cooling the extruder fan I will run that of one off the servo pins (like you) at a later date, still not sure what is meant by a buffer, I assume it won’t have enough power to run a fan.
I understand about your neck pain as I’m of work at the moment with SEVER lumber pain L4 & L5, 22 pills a day to keep it a bay. On a good note I’m in hospital on Monday for a lumber spine injection of some sort and if that works at a later date I will be going in for RFA (radiofrequency ablation) where they burn the nerves in the spine to block the signals going to the brain.
I hope the neck gets better soon.
Thanks for all your help
IanMarch 24, 2017 at 09:12 #5585
E=10, F=9, B=8
F is the model fan you shouldn’t have to change anything for it to compile ther unless you configured something else. The fan would operate as a model fan which you don’t want for that.
It is easy to quickly get into a state of confusion.
i changed my model fan to 4 because I have 2 extruders EEB
pin 9 is already defined in pins
those modules are very cheap if u get it from Ali Express. long delivery time -2,3 weeks. it provides 2 ports, but for some reason I slid it over one pin and only use 1 port. can’t remember whyMarch 24, 2017 at 11:24 #5595
I take it you mean Buffer as being RRD Fan Extender
With 2 fans and UK postageMarch 24, 2017 at 15:13 #5624
yes that is the one from China that I have. The same thing is included in the other. You will need to connect the 12v from the pins near the fuses. If u have a source for the fans near the fans, you can use that. Otherwise carry both to the fan. The device switches ground.
Also, do not run the fan leads with thermistor leads. It will drive u crazy trying to find a solution to that problem. Fans are electrically noisy.
browse this page.
https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20170324071035&SearchText=fan+extenderMarch 24, 2017 at 15:41 #5627
That will be why on my original ctc the thermistors are shelded.
Will be ordering one soon or maybe make my own!
Once again thanks for your help.
Hope you get your neck gets better soon.April 25, 2017 at 17:34 #6807
Printer ZoneStare P802QR2
I am having an issue I do not quite understand.
The Z axis lead screw is T8 with a 2mm pitch and gear ratio 1to1
When I use the calculator, 1.8(200), 4988 ramps at 1/16 and 2mm per rotation, the result is 1600. When I set the Merlin firmware to 1600, the z axis will move 4x the amount called for. Exp. I want to move 10mm, the result is 40mm of movement. I have to set the z axis firmware to 400 instead of 1600 to correct the issue. This correction is acting as if the ramps are set at 1/4 instead of 1/16. Any help in understanding this would be appreciated. The controller is Geeetech GT2960 over the ZRIB board. I changed the board to get to 1600 on the Z axis as the ZRIB board was set to 400. When printing after the 3rd or 4th layer, the nozzle starts hitting the print and I am not getting a clean print surface.
April 25, 2017 at 17:52 #6809
- This reply was modified 5 months, 3 weeks ago by mcp5500.
To the post above, the steppers are Nema 17 @12vApril 27, 2017 at 12:46 #6835
Unless I am reading the screw pitch incorrectly. I measured 1 thread does one rotation at 2mm thread spacing. Am I doing something wrong?April 27, 2017 at 13:47 #6836
this can be confusing. My screw is a 4 start 8/2 (lead/pitch). the pitch is 2 but it is irrelevant to the calc. The LEAD is the number you want. one rotation of the screw moves the nut by the lead or 8mm.
I suspect that is the confusion as it is a factor of 4. I also suspect you are not following THAT ridge around the screw and the screw is probably a 4 start also. Use a nut or turn your drive one rev and measure the axis movement.
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