April 9, 2019 at 2:18 am #96310
Hey there guys,
Most of my parts have arrived, the rest will be arriving at some point between now and mid May. I want to start building the structure ASAP and will start printing after the weekend, but before I start actually building the frame I really need to know if I need to add struts to the frame.
I went for a 1m by 1m which made the tubes for the x and y axis 1.2m… Do you reckon I need struts, cause if so I will need to get holes drilled and will need to buy some form of tap die set to tap the holes.
I want to spray paint the tubes thus I would prefer to do this IF required before I spray paint.
Any assistance would be greatly appreciatedApril 9, 2019 at 4:46 am #96324
Yea, you’ll probably need mid span supports. When I did mine I didn’t bother actually attaching the supports to the tubes. I did the all-thread support, and just ran a nylock nut to the bottom of the tube so it stayed straight. We’re not really worried about upwards motion, the weight of the machine is enough.
1 user thanked author for this post.April 9, 2019 at 5:02 am #96332
Thanks for the response and the info Barry,
Tell me, what size did you go for there? Looks massive, so I am hoping that it’s larger than the size that I have opted to go with, else my wife might just kill meApril 9, 2019 at 5:05 am #96334
Forget about spray painting the pipes.
The bearings will wear down the paint and make it chip off leaving you with pipe that look terrible.
Rather get some stainless pipe and leave it as is.April 9, 2019 at 5:26 am #96337
Ah, well the pipes were coated when they were cut. I guess I could sand them down to remove all of that, but I doubt they are stainless steel.
So what other options would I have, as I want this baby to be as “Sexy” as possible.April 9, 2019 at 6:41 am #96341
Do you reckon powder coating would work?April 9, 2019 at 8:03 am #96352
Powdercoating adds about 150um per side on the pipe diameter.
So your 25.6mm pipe becomes 25.9mm diameter.
You could try e-coating which is much thinner but still strong or hard anodizing.April 9, 2019 at 10:08 am #96381
Doesn’t matter what you coat them with, the point load of the bearings is insane. Ryan cranked the tightening bolts on his stainless machine just to see what would happen. Plastic held just fine, it did push some fairly substantial flats into the stainless tubes. I think he said even the blued stainless tubes on his black and red machine has silver lines where the bearing run. The contact point is less than a millimeter square.April 9, 2019 at 11:19 am #96388
Pinstriped rails might look pretty coolMay 6, 2019 at 4:21 am #99477
Hey there Guys,
I am having a hell of a time getting my hands on a Leadscrew and nut with a 2mm pitch. No-one in South Africa seems to have stock. Every order I have placed for this from overseas via Amazon and Aliexpress have been refunded as they just not getting here.
Local suppliers are able to furnish the Leadscrew and nut with an 8mm pitch. Will this work? Is it as simple as modifying the firmware, and if I do go this route how much precision would be lost?
All I want to do is get this build going!!May 6, 2019 at 4:24 am #99478
This would be the URLs for the Leadscrew and NutMay 6, 2019 at 7:27 am #99488
Any screw is fine, if you can mount it, it is as simple as changing one number in the firmware.
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