Strange moving missed step on delta

Hi! Encountered strange behaviour. When moving head using G commands or using Repetier-Host manual control when about X -20 Y-40 head lifts for a ~0.1mm and when I head back to positive Y it goes down again, one of the towers just stops totating stepper for a breef moment. Mechanicaly all is good, belts are new, tensioned, Im using linear rails. Updated to new firmware. What can cause this behaviur?

Imported from wikidot

Here is a video of this problem: youtu . be/dR4FCwlBEls

Just filmed woth high fps camera, its not belt slipping but stepper motor stopping for a fraction of a second. And exactly when crossing X -20~30 Y-30~40. So it must pe software related. May be bad stepper drivers?

Replaced M666 parameters in config-override from my leveling to zeroes (M666 X0.0 Y0.0 Z0.0) and that behaviour vanished. I believe there is something wrong with delta leveling trimm.

Recalibrated my delta, now this behaviour appears in about X-40 Y-5 cjjrdinates. Maybe devs could look into this in their firmware?

What board ?
What config ?
Using grid levelling ?

No, grid leveling comented out. Here is a link to my config file and config override/ Using Sbase, but there practicaly no support so asking here. Im tried latest smoothie firmware and older.

config - drive.google . com/open?id=1PfN1tFuHpC-6-bqg30THNKHOa-5FME3S

override - drive.google . com/open?id=1u_DoV4QnaMLLzL3yQpu6-zQE_5Vz8-6n

If using sbase, if you haven’t you want to take a look at : http://smoothieware.org/troubleshooting#somebody-refused-to-help-me-because-my-board-is-a-mks-what-s-that-all-about

About your problem, the MKS board runs at 100Mhz, but Smoothie is optimized heavily for Smoothieboards which run at 120Mhz, so if this is a firmware bug it’s probably one that happens only on MKS boards so it’d have a very low priority of getting fixed. This is especially true as this is a delta related problem, and delta is very processing-intensive.

Can you tell me the exact text result of the “version” command ?

Also I just watched the video, and I can’t see the problem in it. Could you re-do it with a different point of view ? ( one where the Z axis is viewed up-front )

There is a slight move up when printer head in red rectangle. just about 0.1-0.2 mm, but command was only to move in -Y dirrection. That small pause in movement at 0:22 is where it moves up.
I know that MKS boards dont get support here much, but its my last hope. With this glitch printer is inoperable.

How to send this command? Tried with pronterface but it dont recognize it. Im on windows.

Send “@version” ( see smoothieware.org/pronterface )

Build version: master-40f595b, Build date: Jan 2 2017 14:43:03, MCU: LPC1768, System Clock: 100MHz

I have installed older version of smoothie firmware just to test, but this glitch still persists.

Here is a better view on this problem: youtu .be/UhKsl0GsRks

Installed latest firmware. Still the same. Version result:

Build version: edge-c819aa6, Build date: Apr 4 2018 16:52:08, MCU: LPC1768, System Clock: 100MHz
5 axis

I’m sorry but this very very much sounds like a mks-only problem due to them using the inferor microcontroller on their board instead of the normal one. We have no report of anything like this on the non-mks boards, and it sounds like a plausible symptom of how they designed the board …

Thank you very much! Hope they’ll reply on issue on theig git. And wil think on buying original smoothie.

Em… where can I get an original smoothie? There is non on eBay or Amazon that I can find. I need international shipping because Im from Russia.(

There are many sellers all around the world : http://smoothieware.org/getting-smoothieboard
( note Robotseed is the main sellers and is experiencing server problems, so you can’t order through the shop, but if you email stephane@robotseed.com he can sell you a board anyway )

this is the only one I could find with international shipping, but its look like a mod?

www. ebay .com/itm/Milkshake-Board-5XC-V1-0a-like-Smoothieboard-3D-Printer-CNC-Electronics/262707676592?hash=item3d2a9905b0:m:mUXtvk9VfzQFQ41YnO8Yfkg

Those are counterfeit boards and we can’t guarantee their quality or their support.

http://smoothieware.org/getting-smoothieboard has a dozen sellers I’m sure some of them ship to russia. And I know for a fact robotseed.com does, if the site won’t let you order you just need to email.

Thank you very much! Am I right in thinking that for single extruder delta I need only 4XC?