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Discuss any sort of mechanical stuff here: positioning systems, gears, extruding methods, etc.
Re: [UK]Mendel parts in wood - 15 years ago
Beautiful! With some brass rods, that would make a great steampunk Mendel.by gr0k - Plastic RepRap Parts for Sale
Re: Photos from Maker Faire NYC - 3D Printer Village - 15 years ago
Surprisingly I was able to print pretty well outside despite the wind on saturday, probably because it was so hot out (about 90 F). Sunday it was cooler but less windy. The real problem was all the dirt. Thousands of people walking around and kicking up dust clouds, everything was coated in a layer of dirt. Kind of hard to keep the platform clean. My belts/bearings started to make some odd sby gr0k - General
Re: Photos from Maker Faire NYC - 3D Printer Village - 15 years ago
It is, it's also almost fully documented on the RepRap wiki here: There's a few changes I want to make to it, but it's working quite well. Right now it just sits on top, but I need to design a better way to attach it to the bar. My only other real issue is that you need a spool of filament that is tightly wound for it to sit on the spool correctly.by gr0k - General
Re: Photos from Maker Faire NYC - 3D Printer Village - 15 years ago
I got a blue ribbon!by gr0k - General
Re: Big Fat Upload Button - 15 years ago
What tool are you using to create the images from the stls?by gr0k - General
Re: [US] Wade's Geared Nema 17 Extruder and Hardware - 15 years ago
I ran out of some of the components and I'm waiting for more to arrive. Perhaps later this week I'll be able to start selling kits again.by gr0k - Plastic RepRap Parts for Sale
Re: Stepper extruder looses torque - 15 years ago
Braden Kear Wrote: > Now I just need to figure out how to use the > skeinforge plugin to find and replace M108 S### > with M108 R### I still haven't tried it yet, but take a look at this rpmify skeinforge plugin:by gr0k - Controllers
Re: [US] Wade's Geared Nema 17 Extruder and Hardware - 15 years ago
I'm sold out at the moment, but I'll be making some more this weekend!by gr0k - Plastic RepRap Parts for Sale
Re: Killer app - 15 years ago
rhmorrison Wrote: > I have had one colleague say "if he needs a > whistle he'll go to the store and buy one for 10 > cents"... I love that. How many times have people said that in the past? Why would I want a telephone? If I want to talk to Bob, I'll see him in town next week. Talking pictures? Who the hell wants to hear actors talk? (H. M. Warner, Warner Brothers, 1927.) . iPoby gr0k - General
Re: Stepper extruder using Makerbot extruder firmware 2.3 - 15 years ago
I actually think what you think is worse performance is the correct way. Now it looks like you might need more/less power, adjust the potentiometer on the board or PWM. It may also be overheating. Might be a good idea to try the RepRap host and firmware as well since the new MakerBot firmware is untested.by gr0k - General
Re: Stepper extruder using Makerbot extruder firmware 2.3 - 15 years ago
dremd Wrote: ------------------------------------------------------- > 1 Question > > Do I pair wires like > > 1A > > Pair 1 > 1B > > > 2A > > Pair 2 > 2B I believe that is the correct way. But it doesn't hurt to try all combinations, at worst it will probably not move or go backwards. I've never damaged anything when I had things wronby gr0k - General
Re: Stepper extruder using Makerbot extruder firmware 2.3 - 15 years ago
I think what that is referring to is the D9 and D10 pins. When I had it working with the MakerBot firmware, I had it wired Mendel style with the wires running from the SCL/SDA pins on the motherboard to the D9/D10 pins on the extruder controller, see: However, I was using the older 1.8 firmware (modified and recompiled to enable the stepper extruder) Also this might help you figure out the stby gr0k - General
Re: Stepper extruder using Makerbot extruder firmware 2.3 - 15 years ago
Actually I just double checked my notes, make that PWM of 160 and an RPM of 16.by gr0k - General
Re: Stepper extruder using Makerbot extruder firmware 2.3 - 15 years ago
I think you need to set a PWM as well as an RPM. I believe when connected to the H-Bridges, you want a PWM of 255 and an RPM of about 15. I'm not sure why it's only moving in one direction... perhaps you should try changing the order of the wires around.by gr0k - General
Re: Stepper extruder using Makerbot extruder firmware 2.3 - 15 years ago
Oh hey, I've been out of town for the past week I didn't see that the new firmware has stepper support! Awesome! I haven't played with it yet, but I'm pretty sure you'll still need to change the machines.xml since they only updated the firmware, not replicatorg.by gr0k - General
Re: Stepper extruder using Makerbot extruder firmware 2.3 - 15 years ago
It looks like you didn't modify your machines.xml because you don't have an RPM and PWM box in ReplicatorG, try this machines.xmlby gr0k - General
Re: SpaceXULA Union - 15 years ago
I'm confused why you think there is no market and that you can't "get your money back". Just because people don't follow through and actually finish a Mendel doesn't mean the money they paid you didn't get deposited in your bank account. If you sell at less than the market is willing to throw away... er I mean pay you because you want to help spread the hobby might make it harder to break eveby gr0k - Job Shop: I make stuff!
[US] Wade's Geared Nema 17 Extruder and Hardware - 15 years ago
I have a few more Wade Extruders plus the hardware needed (now including bearings) for sale. This is the same setup I'm using on my Mendel. I just posted a set to eBay starting at $25 with a buy it now of $45. I also have the same parts for sale on my Etsy shop for a little less, plus I also have a listing for just the printed parts for $29. $5 shipping in the US and $15 international. Printby gr0k - Plastic RepRap Parts for Sale
Re: $630 to make Reprap in US under budget? - 15 years ago
I think the only way you could do it at that price is if you print your own RP parts (using a RepStrap) or have them given to you for free or at cost. (good luck) I managed to do it for about $663 not counting the MakerBot I bought so I could print my own parts.by gr0k - Atlanta, Georgia RepRap User Group
Filament Spindle - 15 years ago
I made a printable filament spindle and here's a link to the page on the RepRap wiki. The idea is to eventually attach it to the frame of my Mendel so that filament management is all built in. For now I'm testing it with my MakerBot (it's easily modified to sit nicely under a MakerBot as well). It features a bowden style tube feed like MakerBot's filament spindle (and half the cost of theirby gr0k - Look what I made!
Re: 3D Printer from China - It had to happen at some point - 15 years ago
There's a video of it printing here: Actually looks pretty slick. The little DC motor on the side looks like it just gives it some feed off the spool every few minutes to prevent it from jamming I guess.by gr0k - General
Re: You need to hear this - 15 years ago
That video with the new Pololu electronics looks awesome! One thing I don't particularly like though is the big bulky box mounted on the top there. I'm working on a printable horizontal filament box that will sit under my Mendel: The extra frame around it might make for a good place to put the electronics.by gr0k - General
Replimat Fabrication Shop - 15 years ago
Hi. I make stuff! Last night I decided to try opening a shop on Etsy. I'm currently selling Wade Extruder parts as well as all the hardware needed (nuts and bolts, soon I'll have some bearings to include as well). If there's anything else you'd like to have printed, just click Request Custom Item to use the Etsy job request system and we can work it out. I'm in the process of figuring outby gr0k - Job Shop: I make stuff!
Re: [US] Wade’s Geared Nema 17 Extruder and Hardware - 15 years ago
Oops sorry, I'm in the US, but I'll ship anywhere.by gr0k - Plastic RepRap Parts for Sale
[US] Wade’s Geared Nema 17 Extruder and Hardware - 15 years ago
I have a few sets of Wade Extruders along with most of the nuts and bolts needed for sale on ebay.by gr0k - Plastic RepRap Parts for Sale
Re: Stepper extruder looses torque - 15 years ago
That is really strange, here's what I see using reprap-mendel-20100719. Maybe try starting a new preferences file?by gr0k - Controllers
Re: Stepper extruder looses torque - 15 years ago
I just downloaded the latest release reprap-mendel-20100719 and I still see that option...by gr0k - Controllers
Re: Stepper extruder looses torque - 15 years ago
I could be wrong, but I think I had a similar problem until I put heat sinks on those A3949 chips. I think they tend to overheat which causes the motor to be twitchy and miss steps. Maybe that's why it blew up too. Also, do you have Extruder0_ExtrusionPWM set to -1 in the host software preferences? I think that needs to be set to -1 in order for the on board pot to work.by gr0k - Controllers
Re: extruder stepper making awful noises - 15 years ago
So anyway, I went back to the RepRap firmware and figured out how to interface a pololu with the reprap motherboard and firmware to just control the extruder motor. It's a pretty huge improvement! Almost totally silent and runs a lot cooler. I blogged about what I did here:by gr0k - General Mendel Topics
Re: extruder stepper making awful noises - 15 years ago
I see. Thanks for explaining the difference. Last night I decided to try some different firmware (mainly because the FiveD was having a hard time maintaining a steady temperature). So I ended up loading the MakerBot firmware (not sure what the proper name is - MakerBot? Sanguino? Gen3? v2?) from after I realized the version in the RepRap svn is really old compared to this. Using the ArduinoSby gr0k - General Mendel Topics