Hi, I have the same problem. How did you solved yours? Thanks in advance Edby evandene - Firmware - Marlin
Thanks I will scrap mine to and install the Full Graphic Smart Controller. What a scam and waste of time and money Also the firmware is nok - no second hot-end support (toggle to second is not possible) - no second extruder support (toggle to second is not possible) - no 2, 3 or 4 fan support (heater, part, motherboard, chamber) (toggle to the next is not possible) configuration.h looks okay buby evandene - Firmware - Marlin
Hi, Did you solved your problem? Could you explain how you solved it? I have in my configuration.h / BQ LCD Smart Controller shipped by // default with the BQ Hephestos 2 and Witbox 2. // #define BQ_LCD_SMART_CONTROLLER Is this correct?by evandene - Firmware - Marlin
I'm using the LERDGE K board as well as two S board's on my machines for quite a while now. The good thing about these boards is: These boards are hardware wise very good designed, great stuff, high quality parts used. The not so good thing is their firmware development. Each release comes with surprises and to communicate with LERDGE is difficult. Like many Chinese suppliers they do not communicby evandene - Controllers
Just to share my mistake For my dual extruder I use NEMA 11 stepper motors, 0.67 Amp/phase. ( ) These light stepper motors can easy go down when powered with a higher current as specified. Per mistake I fired one up with 1.5 amp and immediately one phase was gone. When it happens you can conclude this by measuring the resistance from the 2 phases. (see motor spec) Both phases should be close tby evandene - Stepper Motors, Servo Motors, DC Motors
4 years ago you were posting a design of a retractable nozzle; what is the status of the design? Do you have it in use? What are the pit falls? I'm in the process designing my own but why inventing the wheel if you were successful, right? Could you please let me know the status of this project?by evandene - Mechanics
Thanks for handling this topic. My Delta printer with LERDGE board set with the calculated correction factors A, B & C came close enough to exact. I'm happy with 0,2 mm tolerance field. One remark from my side: Nozzle diameters can vary quite a bit, especially the cheap Chinese ones. This makes that all outer dimension can get bigger and all inner dimensions smaller if a hole is not 0,4mm buby evandene - Delta Machines
Hi all, I wonder if I could eliminate the rubber bands totally by using a counter weight plus three parallel arms, pivoting at the connection with my carriages. Of course the upper beam of the parallelogram can elongate a little. This design would keep the extrudrer (s) straight and always aligned with the hot end.by evandene - Delta Machines
Hi Ace, Do you still have your shifts on a layer? I had something like that before and although I investigated my belts and pulleys at first I didn't discover any play or something else. After a week of frustrations I again went over all of it and than I discovered a play at the belt joints with my carriages. Grrrrrr I fixed it and all was fine again Hope you have solved your problem too becausby evandene - Delta Machines
I decided to upgrade my DELTA printer from 1.8angle to 0.9 angle NEMA 17 steppers what should contribute to more smooth and precise printing. I'm running Machinekit on a Beaglebone Black and a BeBoPr++ controller. After installing the new stepper motors my delta.ini file needed to get updated too of course but I'm struggling again with acceleration settings. I needed to lower my acceleration andby evandene - Delta Machines
Gearing, gearbox, whatever drive based on two or more involute teethed disks or similar do have an efficiency and they do have backlash. The more precise machined and the more precise assembled, the higher the efficiency of a drive system. For example a 3D printed gearing system like sometime used in extruders, do have an efficiency of maybe 40 to 60% due to geometric tolerances and assembly toleby evandene - Delta Machines
Kuhling & Kuhling know how to avoid using gearboxes because of cost and the always under-estimated gearbox efficiency and ever increasing backlash. When someone can play with the lead-screw pitch, there is no reason for adding costs for a gearbox. Worm-Wormwheel gearboxes have an efficiency from 45% to 65% (expensive ones) because of the high internal friction. Planetary gearboxes go from 70by evandene - Delta Machines
Kuhling & Kuhling is using a RADDS controler with 1/128 micro stepper driver in their DELTA printer able to run super high frequencies. The pitch of the lead screws is about 20 mm (close to an inch), no need for a gearbox. NEMA 23 steppers will do the job.by evandene - Delta Machines
I'm very late on this topic but what was the solution? I have exact the same problem and I'm desperate Hope you can help meby evandene - Delta Machines
Thanks everybody for the input, very helpful and you all helped me to move my ignorance boundaries a little. I learned that first of all, I did needed to know a little more about the insides of LinuxCNC (Machinekit) the software I'm running. That the guys who did build the out of the box working software did a good job is obvious but if one likes to improve the machine performance you need to undby evandene - Delta Machines
Second issue found in my lineardelta.ini file found. In the Machinekit lineardelta.ini file In the section TRAJ (trajectory) of this .ini file you set your FERROR or Joint Following Error. A little strange when using steppers but if you like to read more about it please follow this link. Following Error definition It looks as if I did gave FERROR a to low value in this .ini file because after thby evandene - Delta Machines
First and big mistake found in my lineardelta.ini file. As I mentioned at the start of this topic I'm using a Beaglebone Black hooked up with a BeBoPr++ controller and DRV8825 drivers. The software is a version of LinuxCNC "machinekit". In the lineardelta.ini file and related PRU file, max step frequency is defined. My MAX STEPGEN VEL and MAX STEP ACC was set wrongly. I'm not yet done with my corby evandene - Delta Machines
Thanks Pierre, I have all weights, and inertia data available and will walk through my design step by step. My Delta arms of 296 mm center to center are of Aluminum D=12x1 and the ball joints at the end are D=14 mm, ... so quite heavy and possible an area for improvement. Furthermore My stepper motors are 12V 1.7 A, 0.35NM, 1.8ยบ and these should most probably also get upgraded. The effector is sby evandene - Delta Machines
4000 mm/sec. sec acceleration for a NEMA17 with a Pull-out Torque of 0.42NM motor is simple not possible for a belt driven system with carriages, arms, effector and friction. Typical "bigger is better talk". Pull-out torque The stepper motor pull-out torque is measured by accelerating the motor to the desired speed and then increasing the torque loading until the motor stalls or misses steps. Thby evandene - Delta Machines
Nice approach, and helpful, thanks. For me it's obvious to talk about max accelerations and max speed of the effector. And of course product quality; overall dimension tolerance of 0.1mm tolerance FIELD is a must for me. (Cpk 1.67) I admit that although my own design and build is very precise, with very low inertia of effector and arms, I need to improve acceleration capabilities. Part of my prby evandene - Delta Machines
True 100, 200, even 300 mm/sec are indeed possible but only with the right means. The most important variable in the whole speed story is mass and acceleration. If a mass (Arms, Effector, sliders, nozzles, fans, etc, etc) is high and acceleration settings are low, often the requested speed (defined in the slicer program) will never exceed by the simple fact that the print point to point tracks arby evandene - Delta Machines
All, Traveling from A B with a stepper driven system Works well if no speed or accurate positioning is required. Please do following test with your delta printer; 1) go from A to B in Z height like 25 mm (1") and measure the real distance. Most probably all it's within a few hundreds of a mm. 2) do this again but now Z= 0.1mm (0.00393"). Asuming you use micro stepping of 1/16 or 1/32 you will noby evandene - Delta Machines
Steppers are not build for speed neither timing belts. Did somebody ever saw a professional cnc milling machine with a timing belt driven? I'm very familiar with ball screws and they are without backlash and for that there is no play the balls are traveling trough and for that reason the whole system will take care of the kinetic energy and proper acceleration and declaration curves from driverby evandene - Delta Machines
After nice tips, misunderstandings and good idea's, I have decided for; a ball screw 1004 or 1204 with a stroke of 350 mm and a max print speed of 100mm/sec and max travel speed of 150mm/sec. The stiffness, durability and accuracy is preferred; more speed and acceleration is easy to achieve with other motor drive systems. Thanks guysby evandene - Delta Machines
Yeah, my mistake, I should step down to 1/8. I remember that test are performed on the BeBoPr++ at 70kHz successfully , need to lookup that part.by evandene - Delta Machines
A lead screw 1004 means 4mm pitch and 10mm diameter. DRV8825 on a BeBoPr++ and a BBB computer runs 1/32 micro steps. So, should work perfectly, right?by evandene - Delta Machines
If you guys want to read professional guidelines for applying lead screws (ball screws) please visit the THK site and walk through the tutorials. A little calculation tells me that a 1004 ball screw and a Nema17 1.7A 4200gr/cm will do the job perfectly, also speed wise, and don't worry about the coupler and bearing design, I'm doing this for 35 years, i know what I'm doing.by evandene - Delta Machines
HERCEK, I don't think because of using a spindle I add an error to the carriage position at all and second, I'm talking about motor steps. (Backlash is taken in regard by Machinekit)by evandene - Delta Machines
Quite a few Delta's on the market are offered with Timing Belt driven sliders and I wonder if anyone ever has questioned this system. A spindle driven slider can be much more precise as a timing belt driven one. Especially when printing small parts in the center of the print bed of a Delta printer, precise movements do matter. Maybe you have noticed that when printing small parts in the print beby evandene - Delta Machines
I designed a Delta Printer with 16 mm steel Rods and Teflon Glacier bearing bushes and this printer is sturdy as a rock; 8mm rods doesn't work at all. My new design has 20mm steel rods.by evandene - Delta Machines