Thread: operation cnc
kingcreaky, before using the actual material, and possibly making an error. Try cutting it on mdf ir ply ect, to see if your correct then go ahead and cut the actual material, with the knowledge of knowing that your not going cock it up. Saves on grey hairs as well lol. Well done tho, now you can sleep till you have to do the same again lol.
Looking good! You've done more than me over the period, I was away all over Christmas so nothings happened :( Still best pull my finger out as only got 2 weekends free this month to work on my one.Neil...
bit more done... just taking my time... checking and checking again before drilling. and LOADS of tapping (thinking about training misses to do it)
the gantry is now made; the bottom rail is only loosly bolted (need some shorter bolts)
its only sat on the slider plates, as to bolt it to them it needs to be assembled in place..
top rail just sat on top loosly
Looking good! Got a stick welder for Christmas so just learning - seems I have one of biggest learning curves on here and being left painfully behind by you guys! Looking forward to seeing it live! Tapping for me is still fun - guess the novelty will quickly wear off?!
Sounds very rude referring to people by their chat handles, I apologise in advance.
Within JoeHarris's build log, JazzCNC points out that its not possible to get long belts in 15mm HTD flavour.(I also noticed this) His solution was to span the long length with a different flavour belt.
(to be fair, probably the best solution). My plan was a little more un-thought out... My vision was to have dual steppers.. I had read in other build logs regarding the issue of missed steps but I hadnt really realised what this means... and disregarded it with a 'il worry about that later' attitude. The other reasoning behind this question is I ultimately would like to go down the spinning ballnut route ala Jonathons build. As Ive had the fear of god put through me regarding whip of the screws.
However ive just read your post on JoeHarris's build thread the following
I have bought these motor controllers
Cheap CNC! Wantai 4 PCS Stepper Motor Driver DQ860MA 80V 7.8A 256micro CNC Router Mill Cut Engraving Grind Foam Embroidery-in Motor Driver from Industry & Business on Aliexpress.com
(4) of them
Although I have a bob, it was one that come free with the above, I intend to buy another one when I have time to research the best one
Its mentioned above, the problem over missed steps is less significant if you have stall detection.. but I bet the above (cheap) drivers dont have this... ive looked but dont really understand what im looking at. What would you do?
1.)scrap idea of two steppers, and have an arrangement similar to that of the grand master above.. (im favouring)
2.)keep the dual motors (as I have all the gear to hand) where there is one stepper for each of the two screws (the gantry is quite heavy!) but I guess this may entail buying the motor controllers to replace the above?
I genuinly hope this isnt a stupid question.
The Following User Says Thank You to kingcreaky For This Useful Post:
You can get open ended belt in any width up 30mm in HTD flavour. I used 5M HTD15 on my build of the reinforced polymer type. This works great but out of choice doing it again would stick with screws.If the nagging gets really bad......Get a bigger shed:naughty:
Jazz will now vote for option 1.
Coming along nicely KC, I'm researching building a plasma table, thanks for some good info along the way, good luck with the rest of the build.
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