I have installed a new hotend, the E3d V6.
I use the old heater and a new thermistor, deliverd with the E3D V6.
Since i have installed this i have difficulties to print the first layer.
I could be the temperature what causes the problems.
the parts that i have printed are very weak, i can pull of the layers by hand.
Looks to me this is not normal.
my old temperature setting i used was 195.
how can i calibrate the temperature?
i do have an infrared thermometer, but when i point this on the heatblock, i get only a temperature reading from 40-50 degrees.
i don’t trust the thermometer.
[quote=“dutchronnie”]I have installed a new hotend, the E3d V6.
I use the old heater and a new thermistor, deliverd with the E3D V6.
Since i have installed this i have difficulties to print the first layer.
I could be the temperature what causes the problems.
the parts that i have printed are very weak, i can pull of the layers by hand.
Looks to me this is not normal.
my old temperature setting i used was 195.
how can i calibrate the temperature?
i do have an infrared thermometer, but when i point this on the heatblock, i get only a temperature reading from 40-50 degrees.
i don’t trust the thermometer.[/quote]
Ronnie, the E3D has a way smaller heating area for the filament inside the hotend.
Thus, you’d have to print with about 15-30°C higher setting as with the stock hotend, to get the filament itself to the same temperature.
I use about 220°C for PLA and 230-240°C for ABS mostly.
Oke, i didn’t know that.
I thought temperature = temperature.
I am now printing on 210 degrees, looks good, but shall set the temperature higher.
i am printing your extruder parts now (ichbinsnur)
i tested the hole for the filament, it is very tied, is that alright?
does this give no problems when you change the PLA filement?
[quote=“dutchronnie”]Oke, i didn’t know that.
I thought temperature = temperature.
I am now printing on 210 degrees, looks good, but shall set the temperature higher.
i am printing your extruder parts now (ichbinsnur)
i tested the hole for the filament, it is very tied, is that alright?
does this give no problems when you change the PLA filement?[/quote]
It should be tight, that’s why i mentioned to drill it up to 3.0 or 3.2 mm with a drill bit.
If it is too large or unsmooth it will not work good for flexibles.
I’m in a very similar situation, just changed to an E3D v6 hotend using the old heater and the thermistor supplied with the E3D. I’m having the same issue in that my initial PLA layers do not stick, although they did with the Velleman hotend (before I ruined it!). I’ve not tried ABS yet.
I will try hotend temp 220 deg, but what bed temperature should I use? I am using a glass plate covered with blue tape on the K8200 heated bed. Should this work? Should I also use hair spray as some people suggest?
Do you have any other suggestions regarding settings which might be useful?
TIA!
I have raised the temperature to 220 degrees, and it works for me.
The heatbed temperature setting do i have on 50 degrees, it is very difficult to get it higher with the stock powersupply.
It looks like the print are now better…
But now i have an other problem, maybe ichbinsnur knows the answer.
When i get the k8200 i was calibrating the extruder, so i get new steps.
that was a big problem, because eveytime i get a different value for the e-steps.
now i have the new hotend i tought i do the calibration again, so i measured 150mm on the filament, and extrude 100mm
i measure the distance it was 80mm, i had 600 steps, so the new setting must be 750 steps.
i updated the firmware with 750 steps, make a sign on the filament and extrude 100mm. now i mease only 60mm.
that can’t be good, and i dit it again. now i measure almost 150mm.
with trial and error i updated the firmware to 700. measure again, but was getting strange values.
it is not constant.
how do you guys do a calibration when the values are with every meassure different?
I tried 220deg hotend temp and 55 deg bed temp and got a good print. Thanks ichbinsnur!
I’m a very raw beginner, and I haven’t tried calibrating yet. I needed to be able to print something I can calibrate first!
[quote=“cbalmforth”]I tried 220deg hotend temp and 55 deg bed temp and got a good print. Thanks ichbinsnur!
I’m a very raw beginner, and I haven’t tried calibrating yet. I needed to be able to print something I can calibrate first![/quote]
I just ordered my Volcano Kit from E3D for printing larger parts faster.
Ill post my results as soon as i got it tested.
[quote=“dutchronnie”]I have raised the temperature to 220 degrees, and it works for me.
The heatbed temperature setting do i have on 50 degrees, it is very difficult to get it higher with the stock powersupply.
It looks like the print are now better…
But now i have an other problem, maybe ichbinsnur knows the answer.
When i get the k8200 i was calibrating the extruder, so i get new steps.
that was a big problem, because eveytime i get a different value for the e-steps.
now i have the new hotend i tought i do the calibration again, so i measured 150mm on the filament, and extrude 100mm
i measure the distance it was 80mm, i had 600 steps, so the new setting must be 750 steps.
i updated the firmware with 750 steps, make a sign on the filament and extrude 100mm. now i mease only 60mm.
that can’t be good, and i dit it again. now i measure almost 150mm.
with trial and error i updated the firmware to 700. measure again, but was getting strange values.
it is not constant.
how do you guys do a calibration when the values are with every meassure different?[/quote]
Ronnie, are you sure you didn’t mismatch your markings?
The difference between 700 and 750 steps will never be above 100mm.
But your value of 700 is quite close to mine. (694)
So i think you are spot on now.
[quote]But your value of 700 is quite close to mine. (694)
So i think you are spot on now.[/quote]
Yes i know, but i am a perfectionist, i want the good values.
i don’t understand that when i push the button “extrude 100mm” i expect that it extrudes 100mm filament.
but it is always a different value:
sometimes 80mm
the next Time is is 60mm
and then it is 95mm.
this are examples, but with this values i can not calculate a good E-steps value.
do you get always the same value if you extrude 100mm?
or can there be something wrong with my extruder?
[quote=“dutchronnie”][quote]But your value of 700 is quite close to mine. (694)
So i think you are spot on now.[/quote]
Yes i know, but i am a perfectionist, i want the good values.
i don’t understand that when i push the button “extrude 100mm” i expect that it extrudes 100mm filament.
but it is always a different value:
sometimes 80mm
the next Time is is 60mm
and then it is 95mm.
this are examples, but with this values i can not calculate a good E-steps value.
do you get always the same value if you extrude 100mm?
If you get that different values your extruder is likely slipping or loosing steps.
It should be almost the same length at each try.
If the filament slips on the hobbed bolt it can help to increase the tenstion of the clamp spring.
If it looses steps, check if the gear is not set too tight and if the vref for the extruder stepper is at 0.55V.
cheers,
Christian
or can there be something wrong with my extruder?[/quote]
Ichbinsnur:
yes i get always different values when i extrude 100mm.
The first time i was calibrating the extruder it was the same.
I have stopped the calibration, i thought that when i have a new hotend the calibration was easyer.
now i have the new hotend, and i was calibrating again, whith the same results.
I can not see if the extruder looses steps:
The gear is not set tight, i have loosend it some.
the voltage on the stepper is 0.55v
Can this be set higher?
Or is there an other problem, i don’t know anymore
I had the same problem. I found out that the tention of the spring that presses the bearing against the filament and the hobbed bolt was not tight enough.
After tighten it i had very exact results over and over again.
[quote=“dutchronnie”]Ichbinsnur:
yes i get always different values when i extrude 100mm.
The first time i was calibrating the extruder it was the same.
I have stopped the calibration, i thought that when i have a new hotend the calibration was easyer.
now i have the new hotend, and i was calibrating again, whith the same results.
I can not see if the extruder looses steps:
The gear is not set tight, i have loosend it some.
the voltage on the stepper is 0.55v
Can this be set higher?
Or is there an other problem, i don’t know anymore[/quote]
I wouldn’t set it higher than 0.6v cause otherwise the drivers will overheat.
Try unmounting the hotend and extrude the filament into free air.
If the length is stable then, it is caused by something making your extruder motor stall or slipping filament.
cheers,
Christian
I leave the voltage on the stepper to 0,55v. i don’t want to overheaten the stepper.
But i have made some progress.
i have tighten the wingnut to very tight, can’t get it tighter.
now the extrusion is better.
I have set the steps to 738
attempt 1 - 101mm
attempt 2 - 98mm
attempt 3 - 97mm
attempt 4 - 97,5mm
101+98+97+97.5 : 4 = 98.375
738 : 98.375 x 100 = 750.19
New steps in firmware is now 750.19
attempt 1 - 121mm
attempt 2 - 98mm
attempt 3 - 98,5mm
attempt 4 - 99mm
attempt 5 - 99,5mm
98+98,5+99+99,5 : 4 = 98.75
750.19 : 98.75 x 100 =759.68
New steps in firmware is now 759.68
attempt 1 - forgot to measure
attempt 2 - 98,5mm
attempt 3 - 99mm
attempt 4 - 99,5mm
attempt 5 - 100mm
it looks like it is the best to forget the first attempt and to middle the measurements after the first attempt.
I think i leave the steps setting on 759.68
When you’re calibrating the extruder, do so with the hot end removed, or don’t feed the filament too fast. Otherwise the filament is likely to slip.
i have been searching in repetier to slow down the extrusion speed, but i could not find it.
so how can i slow down the extrusion speed for calibrating the extruder?
i have been searching in repetier to slow down the extrusion speed, but i could not find it.
so how can i slow down the extrusion speed for calibrating the extruder?[/quote]
Look under confoguration → Firmware eeprom configuration
There you can set the steps/mm for the extruder.
If the window doesn’t show values recompile and flas your firmware with this 2 line uncommented :
#define EEPROM_SETTINGS
//to disable EEPROM Serial responses and decrease program space by ~1700 byte: comment this out:
// please keep turned on if you can.
#define EEPROM_CHITCHAT
cheers,
Christian
Thanks Cristian,
I do know how to change the steps/mm, but is was wondering if i can slow down the speed of the extrusion.
i think that it is easyer to get the filament trough the hotend.
[quote=“dutchronnie”]Thanks Cristian,
I do know how to change the steps/mm, but is was wondering if i can slow down the speed of the extrusion.
i think that it is easyer to get the filament trough the hotend.[/quote]
Therefore simply lower the flow rate, by the flow rate slider on manual control.