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Thread: Qidi Tech 1 - Replicator 1 clone
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05-21-2016, 12:47 PM #1631
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Because you are over driving the motors needlessly and they get so damn hot that the X motor actually burned me as if I were touching a skillet after 1.5 hours of printing (I never touched any of the other motors after that). With a RepRap you adjust a screw to as low as you can go before it skips and the motors are dead cool. A cool motor is a happy motor and lives a long life but lets not forget a motor that would bring a blister to a hand AND is attached to ABS is a double whammy waiting to happen.
Oh, and the stepper drivers on the Mightyboard are happier (cooler) too.
I have heard nothing but praise for that 2020 model except for the Acrylic bed holders. Replace those with metal if you use a heated bed.
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05-21-2016, 01:04 PM #1632
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- Feb 2016
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Easy way to fix that...don't touch hot parts =P
Honestly though, I have been a metal worker since about age 12 when I started learning how to tig-weld. My fingers don't feel heat so well. I have grabed material off a fully heated nozzle bare-handed....its only hot for a sec. Always grab the plate out of machine soon as print is done, I have a potholder sitting by the printer, almost never use it lol.
I imagine that 3d printing will have much the same end result. You do this for long enough your gonna burn yourself enough that ya just don't feel it anymore.
It's also worth noting that the ABS used in the machine is not the same thermoplastic grade we print with. It has very different properties, as do most injection plastics compared to thermoplastics.
My longest print to date on this machine was a 32.2 hour print in ABS, running basically stock settings in S3D. There is absolutly no deformation of any of the plastic parts on my machine, even the printed feed carriage parts held up just fine, so I don't think that is much to be concerned about.
I can see wanting them cooler for less wear. Kinda odd they are not heatsinked, but I guess ya try and keep weight down. I'm wondering if these value found by others will work...or if I'm gonna have to muck about with em (like everything else) because I live by the ocean....
Kinda miss my home in Az....would be printing heaven there.
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05-21-2016, 01:15 PM #1633
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- Aug 2014
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I just like cool motors and after being in the RepRap world for 4 years you learn about Vrefs and happy motors.
I could care less about burning myself I was just showing how hot it was getting AND no motor should be pushed that hard and that is a fact. In pushed I mean over driving them and over driving them for what purpose? It is stupid to over drive a motor and a heat sink on a motor is just a bandage because if you need to drive the motor that hot then you need a bigger motor with more torque.
It is like using 16 gauge wire with a 20amp load. Sure, it does it but for how long and why do you want the wire to get that hot? Same difference.
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05-21-2016, 10:53 PM #1634
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- Apr 2016
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- Colorado
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- 35
What does everyone use to smooth an object once printed (in ABS)?
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05-22-2016, 12:13 AM #1635
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- Feb 2016
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- 360
Depends on said object...mainly its detail.
Any emery based sandpaper works good, and higher grits even benefit from wet-sanding.
Polishing with acetone and then cold water rinse can do good, but its very easy to distort detail like this.
A sandblaster can be used on SUPER low psi with a very fine glass particulate. But again, you will lose fine details using this method.
Also a method called vapor bathing that can be done, plenty of youtube vids on how to do it.
Have also heard of people using prints as a base and going over them with things like epoxy, plaster, and even bondo.
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05-22-2016, 12:43 AM #1636
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- May 2016
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This thread started out with me asking " why are my steppers burning my fingers? Should they be that hot?" And someone told me to check and see what my Vref's were set to. They were maxed out (118) creating enough heat to melt my cooling fan. I changed X, Y, A, B =60. Now they are cool to the touch with enough juice to do the job.
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05-22-2016, 02:01 AM #1637
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Thank you and you're welcome too as I try to help people with the knowledge I do have and I figure the sweet spots will be between 60-80 for everyone.
Really, maxed out Vrefs for what reason? It is very insane and why this helps to confirm that Qidi Technology is incompetent and just winging it as I said earlier.
Want to know something even more insane? Look at the script that is on tverse and shown here for S3D as that sucker does G130 20 for all while the extruder and bed is heating up then 127 for them. Even worse.
G130 X127 Y127 Z40 A127 B127 ; Default stepper Vrefs <--- WOW
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05-22-2016, 12:32 PM #1638
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- May 2016
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- 10
Thanks for the tips on the scripts! I'm using Simplify3D and it's good to know how to fix the stepper vrefs in the startup scripts since they would have overidden the setup by ReplicatorG.
I've simply copied the scripts from the post at http://3dprintboard.com/showthread.p...6116#post86116 and modified the G130 line (but commented to show the original line). I've not confirmed it, but I'm using values of 70 and kept Z at 40. Does this look good?
If others find this works and is useful, perhaps that other post could be updated for future reference. Warning: I'm a total newb at this so take my mod with caution!
Paste this for the Left Extruder startup script
Code:; **** Qidi Tech Left Extruder start.gcode **** M73 P0 ; Enable build progress G162 X Y F3000 ; Home XY maximum G161 Z F1200 ; Home Z minimum G92 Z-5 ; Set Z to -5 G1 Z0 ; Move Z to 0 G161 Z F100 ; Home Z slowly M132 X Y Z A B ; Recall home offsets M135 T1 ; Load left extruder offsets G1 X-100 Y-75 Z30 F9000 ; Move to wait position off table G130 X20 Y20 Z20 A20 B20 ; Lower stepper Vrefs while heating M126 S[fan_speed_pwm] ; Set fan speed M140 S[bed0_temperature] T0 ; Heat buildplate M134 T0 ; Stabilize bed temperature M104 S[extruder1_temperature] T1 ; Heat left extruder M133 T1 ; Stabilize left extruder temperature G130 X70 Y70 Z40 A70 B70 ; Default stepper Vrefs: G130 X127 Y127 Z40 A127 B127 G92 A0 B0 ; Zero extruders M135 T1 ; Load left extruder offsets G1 X-100 Y-65 F9000 ; Move to front left corner of bed G1 Z0.3 F6000 ; Move down to purge G1 X90 Y-65 E24 F2000 ; Extrude a line of filament across the front edge of the bed G1 X100 Y-65 F180 ; Wait for ooze G1 X110 Y-65 F5000 ; Fast wipe G1 Z1 F100 ; Lift G92 A0 B0 ; zero extruders M73 P1 ;@body (notify GPX body has started) ; **** end of start.gcode ****
Paste this for the Right Extruder startup script
Code:; **** Qidi Tech Right Extruder start.gcode **** M73 P0 ; Enable build progress G162 X Y F3000 ; Home XY maximum G161 Z F1200 ; Home Z minimum G92 Z-5 ; Set Z to -5 G1 Z0 ; Move Z to 0 G161 Z F100 ; Home Z slowly M132 X Y Z A B ; Recall home offsets M135 T0 ; Load right extruder offsets G1 X-100 Y-75 Z30 F9000 ; Move to wait position off table G130 X20 Y20 Z20 A20 B20 ; Lower stepper Vrefs while heating M126 S[fan_speed_pwm] ; Set fan speed M140 S[bed0_temperature] T0 ; Heat buildplate M134 T0 ; Stabilize bed temperature M104 S[extruder0_temperature] T0 ; Heat right extruder M133 T0 ; Stabilize extruder temperature G130 X70 Y70 Z40 A70 B70 ; Default stepper Vrefs: G130 X127 Y127 Z40 A127 B127 G92 A0 B0 ; Zero extruders G1 X100 Y-70 F9000 ; Move to front right corner of bed G1 Z0.3 F6000 ; Move down to purge G1 X-90 Y-70 E24 F2000 ; Extrude a line of filament across the front edge of the bed G1 X-100 Y-70 F180 ; Wait for ooze G1 X-110 Y-70 F5000 ; Fast wipe G1 Z0.5 F100 ; Lift G92 A0 B0 ; Zero extruders M73 P1 ;@body (notify GPX body has started) ; **** end of start.gcode ****
Paste this under for Both Extruder startup script
Code:; **** Qidi Tech Both Extruders start.gcode **** M73 P0 ; Enable build progress G162 X Y F3000 ; Home XY maximum G161 Z F1200 ; Home Z minimum G92 Z-5 ; Set Z to -5 G1 Z0 ; Move Z to 0 G161 Z F100 ; Home Z slowly M132 X Y Z A B ; Recall home offsets M135 T0 ; Load right extruder offsets G1 X-100 Y-75 Z30 F9000 ; Move to wait position off table G130 X20 Y20 Z20 A20 B20 ; Lower stepper Vrefs while heating M126 S[fan_speed_pwm] ; Set fan speed M140 S[bed0_temperature] T0 ; Heat buildplate M134 T0 ; Stabilize bed temperature M104 S[extruder0_temperature] T0 ; Heat right extruder M104 S[extruder1_temperature] T1 ; Heat left extruder M133 T0 ; Stabilize right extruder temperature M133 T1 ; Stabilize left extruder temperature G130 X70 Y70 Z40 A70 B70 ; Default stepper Vrefs: G130 X127 Y127 Z40 A127 B127 G92 A0 B0 ; Zero extruders G1 X100 Y-70 F9000 ; Move to front right corner of bed G1 Z0.3 F6000 ; Move down to purge G1 X-90 Y-70 E24 F2000 ; Extrude a line of filament across the front edge of the bed G1 X-100 Y-70 F180 ; Wait for ooze G1 X-110 Y-70 F5000 ; Fast wipe G1 Z0.5 F100 ; Lift G92 A0 B0 ; Zero extruders M135 T1 ; Load left extruder offsets G1 X-100 Y-65 F9000 ; Move to front left corner of bed G1 Z0.3 F6000 ; Move down to purge G1 X90 Y-65 E24 F2000 ; Extrude a line of filament across the front edge of the bed G1 X100 Y-65 F180 ; Wait for ooze G1 X110 Y-65 F5000 ; Fast wipe G1 Z1 F100 ; Lift G92 A0 B0 ; Zero extruders M73 P1 ;@body (notify GPX body has started) ; **** end of start.gcode ****
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05-22-2016, 12:52 PM #1639
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- May 2016
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Can anyone help me troubleshoot my prints?
So far, I've been very happy with the quality of the prints I've gotten, especially since this is my first-ever 3D printer. I am getting some issues with stringing and oozing (see picture below). I tried the tips on the S3D troubleshooting page but I still get some issues.
I'm using the PLA provided by QIDI. My process settings:
Extruder temp: 190C
Bed: 60 C
Retraction: increased from 1.0 to 2.0 mm
Retraction speed: increased from 1200 mm/min to 1300 mm/min
Given the 3 main variables I'm aware of (print temp, retraction distance and retraction speed), I'm not sure which should try to fix next. I know the long span between the highest parts contributes but there are strings over shorter distances. I'm not sure I should lower the extruder temp any further (in the print, you can see the right it had some bed adhesion issues, although all others stuck really well).
Suggestions?
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05-22-2016, 01:10 PM #1640
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To be honest there is no need to lower the vrefs down as this script did to 20 while heating because I see no effect by doing so. Changing the G130 to 70 and leaving Z at 40 is fine.
What I would do is change the vrefs in firmware and remove the G130 (which I did) from the scripts but if people are incessant upon having it in them then change the first one with the settings to 20 and change them to 70 and Z to 40 then remove the second G130 with all 127 completely. Just make sure 70 works for your machine as some can go to 60 and others will work with 70 and some will require 80.
SteveW25561 That picture is far too small for me to help you.
Holes and pockmarks in print walls
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