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Re: Is there any one here? - 10 years ago

I'm finally printing, after fixing two electrical problems. I had a bad solder joint on the X, Y, and E Enable pin of the microprocessor, and the USB connector case pins were not soldered to the PCB. After a few trial runs I printed out a set of parts New Extruder . Everything printed out real clean except the small gear. I will have to do that one over. I still have a couple of problems. Wh

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Teacup supported on Sanguinololu? - 10 years ago

Motion Problem solved. Bad solder joint on ATmage644P pin 20. Is there some way to turn on automatic temperature updating for the Hotend and Bed when they are on? Thanks for your tips. They got me looking in the right direction

by JohnDH - Firmware - experimental, borrowed, and future

Re: Teacup supported on Sanguinololu? - 10 years ago

It is more than 6 months since the last post, but hopefully someone is still following this thread. I have a Sanguinololu 1.3a that basically works with current Sprinter and Proterface, but only sometimes prints anything (lots of 'Line number not equal last line +1', and 'Sumcheck Errors') I downloaded the latest (05/04/12) Teacup_Firmware.zip, and work on the config.h (see attached). It compil

by JohnDH - Firmware - experimental, borrowed, and future

Re: Is there any one here? - 10 years ago

Solved my wobble problem with new couplings from UltiMachine $7 each John

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Glenn, I've got all the motors turning in the right direction, and homing OK, but when Z is homing from about mid-range, the whole X axis assembly moves back and forth almost a 1/4" with every turn of the Z motors. Have you seen anything like this? If so how did you fix it? John

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Glenn Where did you install the thermistor? I'm going to use one of Josif's suggestion and cement it to the underside of the PCB with two-part epoxy. Also where and how are you measuring temperature? I have a EXTECH Mini IR Thermometer, that I will use. On my way out the door to get four 6-32 1.5" flat head screws to reduce the spacing between the top 'Thick Sheet' and the PCB to one or two was

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Re Heatbed. I decided to go as per the horses mouth Joseph Prussa's Method John

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Glenn Finished wiring this morning, except for installing fans. I have one 40mm square fan that came as part of the Hot End kit, and a 80mm square fan that I plan to use on my Sanguinololu board. I'm puzzling how to mount them. May just hang the on some wires until I can print some mounting brackets. What do you do in the way of fans? My Heatbed arrived lunchtime (A Mk2 PCB Heatbed with 200mm

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Finished my MakerGear hot end and have it installed on the extruder, after boring out the mounting hole to 5/8" diameter with a hole saw in a carpenter's brace. Got my new sooth shaft set today. Found it easy to swap them out one at a time. Much better. That ripple on the McMaster drill rod has gone. Now without the 'Y' belt attached, the 'Y' carriage will slide from end to end under it's own we

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Glen I'll give Ultimachine a try. I have the basic assembly complete, and have moved the machine from my hot over-the-garage workshop to my 3rd bedroom office. I'm starting on my MakerGear hot end kit This week I should get the new set of smooth shafts from Roland Lock. Hopefully they will be without the rippled surface I have on the Mcmaster shafts After Hot End and a shaft swap, the

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Glen, Where do you buy your ABS? is there any local source? John

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

The version you pointed to with 'here' looks a lot cleaner than the version I have. I'll bookmark it on my list of things to print. Did you download the STL files and work from there, or the scad files? I think what I have will work even if it isn't pretty. Have to start somewhere John

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

I have several problems with the Greg's Hinged version of the Wade's Extruder. Some of which go beck to the original Wades design. I think I have it fixed so it will work. 1. The hinged Idler Assembly din not sit square with the hobbed bolt. 2. The skate bearing farthermost from the big gear does not want to stay in place, but moves 1/16" plus towards the idler. You can see the problem on thi

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

I would like to make a big effort to get the 5mm hub and the 5/16" hub exactly in line, so that the bottom end of the 'Z' screw rotates instead of orbiting

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Extruder - Ron Thompson tells me that the printed extruder parts he supplied are for a 'Greg's Hinged Accessible Extruder' Couplings - I commonly use the aluminum couplers that look like a solid piece of shafting, with a hole through the middle and a spiral groove cut through to the center hole to make into a one piece pair of hubs with an aluminum spring in between. I'm thinking that something

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

The shafts are 8mm but the surface is very finely rippled. Maybe drill rod is not up to the tasks. Where did you get your shafts, and do they look like they are centerless ground? I see that VXB sells a shaft and bearing kit for just under $60, but from the picture the bearings seem to be the 608 skate bearings. I'm going to press on with what I have, but think about a retrofit later if I know wh

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Is there any one here? - 10 years ago

Early in the week I got the frame assembled. Seemed to spend forever adjusting nuts to make dimensions equal, with my calipers. On Friday I built and installed the 'Y' assembly. Lots more time adjusting nuts. I'm not happy with the action of the bearings on the shafts. They feel gritty. Ron had a problem when he first tried these bearings on 5/16" (0.3125") shafts, but found them OK when he swit

by JohnDH - New Mexico, Albuquerque - RepRap User Group

John's Thompson Mendel - 10 years ago

Other activities have left little time for this project, but I have made some progress. While waiting for Ron Thompson to print my parts, I ordered most of the non-printed parts and had the 5/16" threaded rod, and 8-mm shafts cut to length as per Mendel. When the printed parts arrived, I laid them out on a table and took a picture. With some help from Ron I was able to edit the image and number t

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Ploblem uploading sprinter firmware to sanguinololu (ATmege644P) - 10 years ago

How can you test that the bootloader is working? I have just built my Sanguinololu 1.3a, and downloaded the Sanguino-0023r3.zip software. I have an Atmel stk500 and used it to load ATmegaBOOT_644P.hex file using AVR Studio 4 with the ATmega644P installed on the stk500 dev board. AVR Studio recognized the device ID as being correct, and the download went without any error report. I then set fus

by JohnDH - Sanguino(lolu)

Re: Is there any one here? - 11 years ago

I'm just starting the assembly of my Ronthrop Mendel machine. I ordered a set of printed parts from Ron Thompson, and they arrived today. I'm very impressed with the quality of the parts he made. Very little clean up required. Someone is cutting the rods and shaft to length for me over the weekend, so things should move along fairly quickly next week. For the electronics I ordered a Sanguinolulo

by JohnDH - New Mexico, Albuquerque - RepRap User Group

Re: Newbie software getting started problem - 11 years ago

I will most likely have the same problem in a week or two, so I will follow this thread

by JohnDH - Reprappers

Re: prusa printed parts? - 11 years ago

I have been looking to build a 3-D printer for some time, and am very impressed with the structure of your RonThomp Mendel design. I design step motor 2 and 3 axis systems for microscopes so the electronic side will be easy for me. So how can I buy a set of the structural parts to get started? Try email at jdhharris@custo

by JohnDH - Florida, Orlando RepRap User Group

Re: Is there any one here? - 11 years ago

Well I'm here, and it is good to find someone else in the Albuquerque area

by JohnDH - New Mexico, Albuquerque - RepRap User Group