Plug your stepper directly into the board - If you plug the stepper in the wrong way round it will go the wrong direction. No problem, switch off, flip the plug and it’ll go the other way.
Extensions just need to be straight through.
Occasionally the motors can come with crossover wires - you can tell because the motor will just shudder not move. If that’s the case you carefully release the terminals from the plug using a pin and swap them.
Here’s a diagram of that
With the motor unpowered and unconnected to anything else if you short 2 pins together and get resistance when you turn the shaft - those 2 are on the same coil.
I can’t remember for sure but I would make the same assumption as you about the Y motor order. When I built mine I connected all the steppers to the board directly on the bench to ‘prove’ them, worth doing before starting to assemble imo.
Thanks for the quick reply, the info and the reference. I measured risistance between connectors and am reasonable convinced that the connectors are correctly placed. When I get power to the board I will rotate the connector if the steppers are running the wrong way.
Thanks! I expect that it will be clear once I power up everything. Switching connectors is a quick fix.
@D.Stultiens would you be willing to share your parts sources? I am living in the Netherlands and while I do speak decent Dutch I am having a hard time finding the translated words for all of the parts and where to buy them. I don’t really want to wait until I go back to the US to bring the parts back with me so if you have a list somewhere or some other way to help me out I’d really appreciate it! Alvast bedankt.
ETA: here is what I have already found on Amazon.nl (I would rather avoid the insane taxes of ordering from China): https://www.amazon.nl/hz/wishlist/ls/1WWIEABYF0AQ5 Some things I already have from a previous attempt at an MPCNC build, and the stuff in the list is just what I don’t already have.
Of course. See attached excel file. MPCNC Lowrider V4 parts.zip (12.5 KB)
I had to zip it to be allowed to post.
Most parts I got from Amazon. For this build, I turned on Amazon Prime to avoid most of the transport costs.
I also used DIY connectors so I can make all wires at the correct length with proper connectors. Already had them lying around, so they are not listed. If you need links to them, let me know. Then I will find them.
Also some realy handy solder - shrink tubes (Amazon link).
With these connectors, you twist the wires together, slide the shrink rube over the bare wire and apply some heat with a heatgun. This both melts the solder (thus connects the wires) and shrinks the tube. I really like these and use them a lot. They claim it to be water tight. I trust this a bit more than taping connectors together. Had some experience that connectors can vibrate loose over time with other projects (pictures are from the 3D printer). I also expect some vibrations in the lowrider.
One last question, what do you use for dust extraction? I have a 76mm hose, but wondering what shop-vac to look at. I already have a festool ctl-mini, maybe I should just print an adapter to use that. saves money and makes use of a vacuum i already have.
I not yet have decided. I think that i will start with a old house vacuum cleaner that i will hold manually. A friend of mine has a cyclone like this one Cyclone amazon. I can borrow that one to test. Don’t know what machine i will connect.
I think other’s can better advice you on this topic.
I have done all connectors with JST-XH connectors. Was a bit of a hassle to correct the inverted steppers, but I’m glad to have put the time in that. The advantage of this type of connectors is that it’s impossible to put them in backwards accidentally.
One question; I get an error message on the display;
When I push “OK” I can move on the axis. When i search online, I find that this is a known issue (apparently something with the TMC 2209 drivers), but should be fixed by Marlin version 2.1.
Any thoughts?
I had the same on my primo, I never took the time to dive into it and yesterday my primo was gutted by my son to use the skr 1.2 on the ender 5 he killed one driver from… The primo’s parts are going to be used for the LR4, so almost nothing is lost.
Yep, that was it. I now see that I ordered the wrong ones at aliexpress. There are 3 types listed as “color”. Default is TMC2208 V3.0 STEP. That should be “color” TMC2209.
I already thought that it was strange that there were some pins missing (the ones that should be bent according the instructions are not on my stepper drivers).
Now, the correct ones are hopefully traveling to me soon.
p.s. the M122 command of course indicated an issue on all stepper drivers;
Hi fellow Dutchie! I think we should be geographically close. So I am following this with interest. I am also planning on building a LR4 with folding table.
They little screw on the ones you have controls the current to the motors and if you keep using these, that needs to be adjusted. I don’t know how to do it on the TMI in standalone mode.
Thanks for the info! But i think that i want to try to remain as close as possible to the original design. Just a few weeks of patience. In the meantime i can give some attention to the table.
I will not trow these drivers in the bin, so maybe at a later moment i will tinker a bit with them.
Thanks again. Really appreciate your help!
