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Microstepping and steppers in serie skipping (tmc2100) (4 replies)

October 11, 2016, 4:13 pm
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Hi
In an attempt to get smoother surfaces and less noise from my Folgertech FT-5 (MKS Gen 1.4, Cartesian with two steppers for Y axis) I have replaced the stepper controllers with TMC2100.
This take the 1:16 from the MKS and make it 1:256 in "spread cycle" mode, which was was very nice for a few minutes, until the Y axis started skipping.
I have tried changing the voltage from 0.9v to 1.5v, with no result.

Is there anything fundamentally incompatible between twin motors and micro stepping? I have considered changing the machine to corexy, but that is a lot of work just to get microstepping working, beside I need it working and plan do make a custom corexy next year anyway. Should I abandon and do with the noise and rice paddy surface?

Thanks for reading!
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For the low-voltage steppers we use, is a low-voltage driver like DRV8834 more appropriate? (2 replies)

October 12, 2016, 2:27 pm
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Most of the stepper motors we use for our machines are rated for low motor voltage (2-5v). However, most electronics seem to use high-voltage versions of the stepper drivers. For example the popular A4988 and its clones operate from 8-45v. Is there a reason why this isn't a problem, or should we instead be using low-voltage drivers like the DRV8834 (2.5-10.8v)? Am I missing something obvious?
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TB6600 4A steeper motor drive : what controller?:S (7 replies)

October 27, 2016, 1:16 am
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Dear all,
I am planning the build of my second printer Cartesian replicator type.
Since I am planning to use some automation scraps from my work, I would need to RN my X and Y most likely with Nema23.
The DRV 8825 or 4289 are out of equation, so I am seeing the affordable eBay TB6600 4A stepper driver.
The controller that I have on hand are Melzi and Ramps 1.4 since Melzi.
Melzi is out, then is my Ramps capable to run the TB6600? I remember seeing a review that the pulse sent from ramps/ arduino were too short
Making it unsuitable to run bigger external driver.
is this right?
If the above is correct, then what other controller could run external driver?
MKS Sbase 1.3
Smoothie x4
Due+ Radds
Duet Wifi
???!!

Now, my preference would be the MkS Sbase due to the cost.
Then I would go for Radds since I have a Due..,,,,,,,

I need some guidance.
I know may be my info is not enough, since what Nema23 what voltage torque...etc
But, I think I need to know what controller could run the stepper drive and then I would know what stepper motor I need..?

All feedback are welcome!!
Thanks slot in advance!!!
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Problem with the stepper or driver? (3 replies)

October 25, 2016, 5:57 am
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I have had the same problem a few times already. I mostly get this problem after I do a hard shut down (pull the power plug) while running a G-Code (i.e. because I ran into an end stop or the stepper made wired nosies)

I connect via Pronterface and try to move the y-axis (its always the same axis). The stepper makes a sound like it would be moving but the axis doesnt move at all. I then shut down the power supply and switch the cables for the x-axis and y-axis motor. So now the y-axis runs via the x-driver and visa versa. I initally did so because I wanted to find out if the driver or the stepper is broken but both motors will run without problems. I then switch the cables again so that motors and drivers match each other again. After I connect everything is back to normal.

Can someone please explain what is happening? Should I exchange the y-axis stepper or driver? Did someone else experience the same problems?
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Adding custom PWM output to extruder (3 replies)

October 26, 2016, 9:24 am
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I would like to add a preset to an extruder such as in Repetier's color mixing and virtual extruders definitions, but with the pwm output instructions going to a set of auxiliary pwm pins. Would anyone have any advice on how I might edit pins to create that output? So far I am putting pieces together to try and cobble that, either by adding a custom MCode entry or editing the output of M163 such as is used by the Repetier virtual extruder.
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Which stepper motor? (3 replies)

November 8, 2016, 5:08 pm
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Hi, I'm building a metre high delta with a working diameter of 220mm.
I plan to use the Rumba board with DRV8825 drivers, which I already have a stock of, I also plan to have a heated bed which I might run at 24 volts.
My question is what stepper motors should I use in this setup? I'm looking for good detail and will be adding multiple filaments (3) into one extruder plus a separate one for support material when required.
Hope you can help
Thanks
Roger

Fully paid up member of the Old Pharts Club
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MKS LV8729 , a 128 µStep Driver // Any test? (2 replies)

November 23, 2016, 10:04 am
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max speed with lead screw (3 replies)

November 23, 2016, 3:53 pm
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Hi folks,
just starting to plan the next machine but I'm thinking of using lead screws instead of belts this time.
What I'm wondering is is it possible to calculate the max speed based on weight moved,
torque of the stepper etc?


Many thanks.
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Can I drive this steppers with RAMPS 1.4? (2 replies)

December 9, 2016, 3:19 am
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Hello,
sorry for my question, may be OT, but I can buy these stepper motors ( 23LM-C355-P2H, 17PM-M007-02, 17PS-C103-P1 from Minebea Co., Ltd.) for good price. Problem is, that I can't find some datasheets of 17's stepper. That's some custom motors. Only info I have is: Minebea 23LM-C355-P2H (Olivetti 57BYG 060), 56x56x50mm, 1,8°/step, 0,6Nm; Minebea 17PS-C103-P1: 42x42x39mm, 3,6°/step, 0,22Nm; Minebea 17PM-M007-02, 42x42x34mm, 1,8°/step, 0,15Nm.

Is there any way to find more info like Voltage? Can I drive this motors with ramps 1.4 if yes so what power supply I should use?

Thanks very much for any respond!
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Connecting Stepper Motors and Drivers (1 reply)

December 12, 2016, 12:54 pm
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Hi,

Recently, I would like to try a project with multiple stepper motors. I am trying to connect the stepper motor as shown in the diagram attached. The stepper motor driver used is DRV8825 Stepper Motor Driver Carrier.

[attachment 87292 Layout.png]

Motor A: [www.omc-stepperonline.com]
Motor B: [www.omc-stepperonline.com]
Motor C: [www.omc-stepperonline.com]

Will there be any problem with the connection? Any suggestion is welcomed.

Thank you.

Best Regards,
Qzai09
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Help with correct vRef (no replies)

December 15, 2016, 5:59 pm
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Back story is I have had my printer for few years and I was told not to worry about setting it with a meter just tune it to where it doesn't skip steps and leave it. I have had nothing but issues with my extruder where the hobbed gear slips I think maybe due to the extruder being too hot causing the slip. It is fine if its an 30min print but any longer its it will slip for sure.

I have ramps 1.4 with china pololu 4988. The resistor values on the board say R100 a pair of them so I assume that these are the sensing resistors. (I can not read the board to see if it is r7 and r8 its smeared)

The motors I am using are 1.8a/phase (if I am reading it right.)
X, Y, Z
[artofcircuits.com]

And for E It just says 1.6a I don;t know if that is per phase but I assume.
[www.phidgets.com]


So here are my questions.

1. Would this be the correct way to figure out my vref for 90% of max?
1.6 * 8 * 0.1 = 1.28 * 0.90 = 1.152v


2. Is 90% too much? What do you recommend?


3. Do I have to double the value of the Z to provide it twice the power since it is running 2 nema's?

Thanks in advance for your help
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Stepper motor 0.72 /step (2 replies)

January 5, 2017, 12:19 pm
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Dear all,

Looking for some feedback.
How would a stepper motor with 0.72/step be running for a 3 d printer?
I mean, is it feasible ?
If yes, what stepper driver could run it?
Would the popular polulu 8255 or 4988, TCM2100
able to run? Then a Duetwifi, Smoothieboard could handle this motor?
Apology if much of the questions sounds redundant, but the more I learn,
the more I could decide which way I should go for my next build. ( slowwwww project)
It has 16.6 kg cm holding torque at1.4A/phase
And 2.7Vdc
5 phase
model: A16K-569

Thanks in advance!

Robert
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Stepper motor not working (no replies)

January 7, 2017, 10:49 am
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My stepper motors shake and whine but don't move I Have used my volt meter curent runs through the motor, Then I tested my wires curent runs good through it, I looked at my connections they look like the work, My marlin board should work Because my lcd screen works. What else could I be missing.
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Looking for ways to smooth out the movement of my stepper motors. (8 replies)

January 15, 2017, 10:23 am
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I have been tuning my set up for a few weeks now and have most of it dialed in. But, I still don't have my steppers operating like I want them to. They work fine but I want to decrease the harsh changes of direction, especially for short length infill. I have gradually turned down the accelaration and jerk all the way to 750/2.5. In cura I have decresed my speeds to 30mm and 15 for infill and it is still jarring. Today I upraded my mounts and and couplers so it can handle it but I would really like it to get this sorted out. I want to make it cushion the changes in direction so i can turn the speed back up. Also, during starts of moves or transition of lines the motors will make a harsh shuddering vibration and then go back to moving smooth. That is by far the most annoying problem of all.

Any suggestions would be greatly appreciated.

I am going to try to post a copy of my configuration.h
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What are some ways to decrease stepper motor noise and vibration? (6 replies)

January 15, 2017, 5:56 am
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I have been tuning my set up for a few weeks now and have most of it dialed in. But, I still don't have my steppers operating like I want them to. They work fine but I want to decrease the harsh changes of direction, especially for short length infill. I have gradually turned down the accelaration and jerk all the way to 750/2.5. In cura I have decresed my speeds to 30mm and 15 for infill and it is still jarring. Today I upraded my mounts and and couplers so it can handle it but I would really like it to get this sorted out. I want to make it cushion the changes in direction so i can turn the speed back up. Also, during starts of moves or transition of lines the motors will make a harsh shuddering vibration and then go back to moving smooth. That is by far the most annoying problem of all.

Any suggestions would be greatly appreciated.

I am going to try to post a copy of my configuration
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DC motor extruder control (1 reply)

January 29, 2017, 3:16 am
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Hi

I have a problem and was hoping you could help.

I am building a 3d printer from "junk" .
So far i was able to make the x,y,z axis work , even tested them with a pen n paper since i cant use extrusion wich is where my trouble comes in.

Im using an arduino uno board to control everything and the Teacup Firmware. Its all nice and good until i get to configuring it to use a dc motor extruder.
The reason for the dc motor is i also built the hot end myself and the extruder using gasstove nozzles and such. Happy to say it extrudes plastic if i run the motor.

Now if someone could explain to me where and what i should define in the printer.h and board.h files of teacup , or the config tool and how to configure / determine the pin i need to use to send controls.

And before someone says "just use a stepper" thats a no no . I have to use a dc motor beacause of a future mod i might do to it.

Ty in advance and sorry if i didnt post in the right forum or if my post is in some way bad.
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Stepper driver help (no replies)

January 29, 2017, 9:44 pm
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I don't know if this is posted in the correct forum, this just looked like it was pretty close to what I need.

I have a RepRapGuru Prusa i3 diy kit that was working wonderfully up to this morning. I developed a serious clog in the nozzle which I fixed with ease. I looked on YouTube to help troubleshoot the problem, and I may have messed up pretty bad. The video I watched said to adjust the voltage pot on the extruder stepper driver, which I attempted to do even though I was too lazy to go get my multimeter and check it first. I think I killed something, the driver will not drive any of the axes. I can drive the extruder motor with the other drivers. It still stutters, which was part of the problem in the first case. The extruder stepper motor is good, I put on a new driver that came as a spare, and it didn't help any.

If anyone has any suggestions on how to fix this problem, all help or advice is welcome. I have the option of running a dual extruder setup, can I just swap the stepper driver over to the second extruder pins and adjust accordingly in the arduino files?

I'm running Marlin V.2 on an Arduino Mega with a RAMPS 1.4 controller and stepstick drivers in case this information is needed.

Should I assume the worst and order a new RAMPS board, they are not that expensive and a spare might not hurt to have laying around if that isn't the issue.

Thanks again for any help.
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Stepper Help (no replies)

January 31, 2017, 7:17 am
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Alright. I am making a delta printer. Currently I am running into a lot of problems. The largest of which are the steppers. We are using a rambo 1.3L board. We are using repetier as our firmware because I read somewhere that repetier is more user friendly toward deltas.

Here is the problem. My stepper motors when I try to move them at all seem to lurch forward then backward. Any suggestion of how to fix this problem?
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Degrading performance of 0.9° steppers (3 replies)

February 2, 2017, 9:35 am
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I've bought a batch of 42BYGHM810 steppers a while ago and I was pretty happy with their behavior.
But over a few working hours they seem to cause problems. It feels, like they've lost the permanent magnetism which causes missing steps. I even blamed my diamond hotend to be partially clogged, but now I think it's the steppers.

I have one unused stepper and compared it with the used ones:
When I shortcut black/green and red/blue coils and turn the shaft by hand, I can feel much more resistance with the new one.
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0.4A Stepper motor vs 1A stepper motor using A4988 drivers? Motor Stalling problem (2 replies)

February 5, 2017, 6:12 am
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I'm having a problem with my extruder stepper motor stalling for retraction speeds over 10mm/s. I still have retraction problems so would like to increase this if possible. I don't have problems with stalling on my 0.4A X,Y,Z stepper motors.

I'm using a Greg's Wade extruder for Prusa i3 with a Nema 17 Bipolar 40Ncm 12V 0.4A Stepper Motor.

My extruder Pololu A4988 stepper driver is tuned to .16V. (Vref = I_TripMax * 8 * Rs) (Vref = .4*8*0.05 = 0.16).

Relevant settings in Marlin:

DEFAULT_MAX_ACCELERATION {1000,1000,100,10000}
DEFAULT_RETRACT_ACCELERATION 3000
DEFAULT_EJERK 5.0 // (mm/sec)


Would I have more luck with a 1A stepper motor?

Is the current rating of my motor the limiting factor to my retraction speed?
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