Show all posts by user
That was it. Took some guess and test, but finally got it.
by
gmh39
-
RAMPS Electronics
I didn't use extension cables., but I'll double check that because I think they wiring for my new motors is slightly different than the previous ones (which moved, albeit very roughly).
by
gmh39
-
RAMPS Electronics
Approximately the thickness of a sheet of paper.
by
gmh39
-
General
So I am setting up my CoreXY build and the motors will not turn.. When I try to move them using Repetier Host, all that happens is they make a loud buzzing noise and vibrate. I have Vref set 0.8 V, which I would think is enough.
Here are the motors I am using:
I am using DRV8825 drivers in a RAMPS 1.4 with Marlin.
Both motors do the same thing. and the z motor just doesn't move at all.
Any
by
gmh39
-
RAMPS Electronics
From what I can tell, the only advantage is being able to set the current digitally.
What I don't understand is why this can't be done with a Pololu driver?
by
gmh39
-
Reprappers
I use an exacto knife for small stuff like chamfering.
by
gmh39
-
General
Impressive!
Definitely stealing that CoreXY chart for my current build.
by
gmh39
-
CoreXY Machines
Once I'm done with my current build I'm planning on building a large Core. Idk what the build dimension will be but the MDF I have laying around is 500++mm on each side, so it'll probably be massive.
Kinda wish I had found the Smart Core before I started my current build. Would have saved me lots of $$. Oh well.
by
gmh39
-
Smart_Rap
So you're trying to save ~$30 for in the hope that printed extrusion will hold up? I'm sure there are much better ways to accomplish your goal.
Are you set on designing the printer yourself? If not, check out the Smart Core. It's a CoreXY designed by the guys that did the Smart Rap printer.
If you are, I'm 100% positive you can get enough to make the frame (a basic cube) for less than $100 f
by
gmh39
-
CoreXY Machines
Make sure your X and Y belts are tensioned well and your steps/mm are set properly.
by
gmh39
-
CoreXY Machines
I've never had to use one, but shouldn't pliers work fine? Just squeeze the ends together, insert/remove belt, then let go.
by
gmh39
-
General
We use BuildTak on all of our printers at work (2 Makergears, 1 GMax, and 1 Cube Pro). They all have great adhesion and prints are very easy to remove. The 2 Maker gear printers use a heated glass bed, while the Gmax uses a non-heated aluminum bed.
Just a little reference.
by
gmh39
-
Mechanics
I have some Openbuilds 2040 v slot extrusion I need cut down to an exact size. My attempts to use a dremel/hacksaw did not turn out too well. I'm sure something as simple as a bandsaw could get the job done in like 5 seconds.
I am located NYC (Queens, specifically) and would prefer someone local since it is a quick job, but I am willing to ship if need be.
You can just PM me with offers.
-Gr
by
gmh39
-
Job Shop: I need stuff made!
Quotefatesalign
I think I figured it out! Please if someone could tell me if this will work or not. The original motor is not a Nema 17 motor, but I think its a knockoff. Unfortunately, I am not near it to get the number but here is the sales page.
What I want to do is buy these connectors:
And this motor:
Then solder them together. Do you know if it will work? I have 3 hours to get it ove
by
gmh39
-
Reprappers
It should be pretty straight forward, so long as you know the current of your steppers, and the type of thermistor. You may have to replace some plugs for compatibility.
by
gmh39
-
Reprappers
QuoteDave_robinson_022
Quotegmh39
That design would need to be driven by 2 motors the way it is drawn. That wouldn't get rid of a level problems. It would be the same as using 2 lead screws on opposite ends of the bed; if one skips a step or binds slightly, your bed will become un-level.
If you are trying to keep the gantry as light as possible, why not just use a corexy system? The X and Y m
by
gmh39
-
CoreXY Machines
That design would need to be driven by 2 motors the way it is drawn. That wouldn't get rid of a level problems. It would be the same as using 2 lead screws on opposite ends of the bed; if one skips a step or binds slightly, your bed will become un-level.
If you are trying to keep the gantry as light as possible, why not just use a corexy system? The X and Y motors are static and the gantry ca
by
gmh39
-
CoreXY Machines
As a rule of thumb you should calibrate your machine under printing conditions.
by
gmh39
-
Reprappers
Did you try contacting them? Derek is very responsive and helpful.
I've ordered 2-3 times from them and I'm getting ready to place another order.
by
gmh39
-
Reprappers
pussyfoot... is that like kitten-mittens?
by
gmh39
-
General
It's all I use. It's decent stuff. Just make sure you measure the filament before printing (you should really do that no matter where you get your filament from). The rolls tend to be +-0.5 around their median value.
by
gmh39
-
General
I just use standard micro switches. But you should only need 1 endstop per axis.
by
gmh39
-
CoreXY Machines
Does nylon take a while to cool down when printed? If so, then they are probably setting the carbon fiber strands into the nylon while it is still soft so that they stay in place, then printing more nylon over top to seal it in.
you can get carbon fiber tow (carbon fiber string) in pretty thin thicknesses. So long as you can keep the whole strand together as it is routed through the printer it
by
gmh39
-
General
Just kidding. read more into it and I was wrong...
by
gmh39
-
General
I designed a linear slide for aluminum extrusion that used pieces of PTFE tubing as a bearing surface. Worked great once it was dialed in.
Here's a pic of the x carriage on the printer.
by
gmh39
-
General
My work computer doesnt have sound, so I cant hear the noise. But I assume you are talking about either of the moving bars (when referring to the X spanning bar). Looking at the bearings, it looks like they are too short. a 2 :1 ratio of cantilever to bearing spacing helps to prevent twist in the cross beam. Id be willing to bet that is the noise your hearing. If you google "igus 2 to 1 rule
by
gmh39
-
Developers
Those prints look great!
What size extrusion did you use?
by
gmh39
-
General
You can use different methods for print adhesion also.
by
gmh39
-
Reprappers
This looks awesome!
What did you use to connect the panels to the extrusions?
by
gmh39
-
General
