bdring / polar-coaster Goto Github PK

Not really an issue, more of a question. What screw do I need to fasten the small gear? I tried with an M8x8mm screw. While that keeps the gear in place, the screw head interfers with the big gear.
Thanks in advance :)

It has been noted that other countries use different coaster sizes. There is a not a lot of flexibility in the current design, especially going to a larger diameter coaster.

The firmware can handle any size and probably accommodate other changes. If you are looking at a redesign, here are some thoughts.

1. The board does not need to be part of the design. A simpler existing board could be used remotely or packaged within the base. I sell some on Tindie.

2. The geared rotational bed is complex to model. Someone suggested a direct drive. That is probably doable without affecting quality. I would probably suggest a metal hub, rather that direct mounting of the 3D printed part. It is more likely to be concentric and could buffer the heat from the motor.

On the boom theres this link for it :

https://www.amazon.com/WGCD-125V-Micro-Limit-Switch/dp/B06XFL4MZ2/ref=sr_1_21

but on the board there's only 2 holes.

Got it sorry sorry

Hello,

I am building this machine and I have read more or less all the material that I can on the V2. There's mention of a python script to compile gcode for the Polar Coaster, but I don't see it on github. Are there instructions to creating the gcode for this machine?

I found a couple other Nema14x20mm steppers on that site, but don't know which one.

• 1.8 degree: https://www.omc-stepperonline.com/nema-14-stepper-motor/nema-14-bipolar-1-8deg-5ncm-7-08oz-in-0-4a-10v-35x35x20mm-4-wires.html

• 0.9 degree: https://www.omc-stepperonline.com/nema-14-stepper-motor/nema-14-bipolar-0-9deg-5ncm-7-08oz-in-0-5a-5v-35x35x20mm-4-wires.html

In the SD file listing, add some way of tagging which files are fed from the buttons.

Hi,
I understand that BOM is in progress and not everything is listed.
But I noticed that one listing is misleading.
In schematic and a digikey link C5,C6 capacitors are 47uF, but in the BOM it says it's 4.7uF.
https://docs.google.com/spreadsheets/d/1ZX7-w3RRlV4LFHbHOMovw8RLWblGm1u_bLe6--jveR4/edit#gid=0&range=B34
Hopefully it's 47uF, as I already purchased some.

Thanks
P.S. Once I finished building I would share a complete BOM for the update.

When we try to download the firmware into the ESP32 controller we get the following error:

error for compiling board NodeMCU-32S
Text section exceeds available space in board
Sketch too big; see https://support.arduino.......
Error compiling for board NodeMCU32-S.

Hopefully you can help us with this problem.

It appears that he link to the polar coaster branch of Grbl_ESP32 provided in the readme is broken

Most of the time, only one of the two stepper motors can rotate. In readme README.md, it is described that the antenna will interfere with the stepper motor driver. so,How to avoid it. thanks for you reply