In need of Gear expertise. I have a standar Greg wade Gen 4. When i send 50mm to my extruder it feeds 152mm. I cant modify the steps for the motor so i have to make a new set of gears for this. Its the 47/9 ratio gear but i cant get an understanding of the gear generators online to make new ones. Can someone please help me out here on making this??
Hi @Joshua_Taylor , you can try contacting Alex Crease:
Hope it helps.
To make specific gear ratios, use “parametric involute gears” (Thingiverse).
What is preventing you changing the steps in firmware? This is a normal calibration item and I would want to do this regardless of changes, to ensure good feedrate calibration. Maybe we can help with that.
I use the M3D printer and the software is locked down. I can’t change stepper settings nor will it accept Gcode direct calibration. Other Hosts don’t support the M3D either other then OctoPrint but it uses the M3D profile locally linked in the computer with the drivers.
The best self-explanatory tool to make gear I’ve found:
@Michael_Memeteau I played around with this but still don’t know HOW to recalculate the correct gear size/ratio to reduce the Greg wade 47/9 to only produce 33% of its output
@Michael_Memeteau
That is a beautiful piece of work! It’s late for me, so I may not be thinking too clearly, but one would expect that the gear axle spacing is pretty darn important in creating gears that will function for Joshua Taylor.
@Joshua_Taylor
If you’re getting 152 mm for 50 mm of request, you have a 3.0400 multiplier to address. I’m guessing here, but your 47/9 would need to have 47*3.04 teeth to reduce the feed. That’s 143 teeth, but not precisely. The number I came up with is 142.88 so you might get a tiny bit less than 50 mm for your request of 50 mm. A 143/9 ratio may be the answer.
I played a bit more with the gear generator and found a 10/157 gets even closer, but the axle spacing is likely to make things complicated.
I’m not sure where you can go with this, not having seen the insides of your printer.
Wow that gear generator program is really cool, had a play with it.
It’s interesting. Appears they are using a spin of Repetier, but actually checking the contents of the firmware on printing for changes, of the type we are looking to make here! An interesting approach to locking down the platform.
Is it possible to use a different software package as part if your workflow?
I so wish i could extract the firmware and copy all contents out to a nonlocked version where i can modify the steps but i cant begin to understand firmware extraction.
@Ross_Bagley i think when i finish my delta im going to rip out the board and stick one of my reprap boards in there.