Ultimate Bee, Electronics, Calibration, soft limits, oh my!
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- เผยแพร่เมื่อ 24 เม.ย. 2024
- After a trip to Vancouver with the family I make some good progress on the CNC. Getting most of the electronics mounted and the machine running under its own power.
I go over calibrating the steps per mm as well as setting some soft limits on the machine.
Thank you to @SienciLabs for their GSender software and its intuitive calibration wizard.
#cnc #cncmachine #woodworking
if you want I have a quick 3d print for a cable management comb, something I designed so that the cables maintain the same order throughout the cable chains, also keeps the spindle cable away from the stepper cables by spacing it with the water coolant lines, which is important for EMI :)
Nice, yeah send me a link.
Space? What space? You'd need 6ft or more to reduce EMI interference from the spindle cable, let alone the stepper drive wires. What should be done is a common ground point for the shielded cable drains(from every shielded cable). Having shielded cable is pointless if the shield is not grounded. Adding clip-on ferrite are also a good idea. That controller's USB line is very susceptible to interference.
Sorry let me clarify lol think i hit a nerve there...my Stepper cables, limit switch cables, and spindle cables are all double shielded cables of which the source end is grounded to a common ESD drain Rail which drains to a Seperate Earth Grounding Rod... the space I have created is not enough to completely eliminate EMI but every bit you can do is more than doing nothing at all... im not saying the spacing and logical ordering of the cables is enough to reduce EMI completely or even significantly but it is done to ensure that the cables are not twisted together which would create an increased risk for EMI interference. Sorry ADHD brain so I tend to explain things in shorthand sometimes >.
I like the idea of a comb for cable management regardless of the effects on EMI, if you don't mind sharing the file I would love to give it a try.
How was Van? I went last year. Compared with current images on the net, it has 'changed'...
If you get chatter making deeper cuts, I recommend adding vertical angle pieces to the gantry uprights. They are rather thin looking and under load could be a point of flex, especially when traveling in the X. A single piece of 1/2" angle iron would stiffen that up like no tomorrow and not interfere with the Y movement.
Van was great, the weather was very nice to us and held off raining until the travel day.
Thanks for the advice the back of the X has a 40x40 profile to help keep things rigid but I was looking at the small 90’ connectors thinking a piece of angle iron might make a better connection between the two.
I plan to run it as is and push it a bit and then make videos on any upgrades so I will keep your advice in mind as I move forward.
What is your table size? I've got largest 1.5x1.5m and X gantry has very low torsion rigidity for this size unfortunately. You can push the router bit and it would deflect whole assembly very easy, bit was jumping with slightest speed increase. By default X gantry is C profile and 40x40 square profile at the back which is in the center and therefore gives nothing for the torsion. I ended up using two C profile back to back and additionally two 80x20 profiles above and below these, it now seems that it is more or less acceptable. Next problem is quick wear of screw nuts though :)
My table is 50” wide by 48” deep. I have room on all sides to allow for wall panels if I choose to enclose it at some point in the future.
So far my Z is stable with very little deflection when pushing on it but once I get my hose order and get the cooling setup I can do some real world testing.
hi nice job . can you send me the VFD wiring to the controller plan, Thanks
I posted a follow up video with documentation on how I connected it. It’s in the playlist for the Ultimate Bee list.
Ultimate Bee H100 Spindle to xPro V5
th-cam.com/video/U_34-v9G8O8/w-d-xo.html
I didn't see any gear reduction so you can just do some easy math and just set the values IE: steps per revolution of stepper is 360 / degrees per step (usuallly 1.8) then you just take (steps per revolution / lead screw pitch in mm) x microstepping. From there you would go into fine adjustments using an indicator and small moves with that wizard.
Thanks
Note of caution. Mounting on Wood is bad practice. Electricity+flammables = recipe for disaster. Play safe, get a metal enclosure. Besides, that router, no matter how well you make the vacuum system, will produce dust and find its way into the electronics. Keeping them cool and clean, and grounded, is a good thing. Ground the chassis, too. It will make static electricity which can cause sparks through the moving dust.
Fair advice I will take a look at some other mounting options in the future.