My Newb Plasma Table Attempted Build

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23 May 2020 06:22 #168652 by rodw

phillc54 wrote: Thanks Rod, I probably will make a reduction unless I stay as my my normal lazy self and change to GT2 but that may be a bit light. The other lazy option is to get a 16T 5mm bore and see what happens when the bore grows to 6.35mm.


Lazy is good. Thats why the spaceship is not painted because its not finished yet! :)

I was looking at belts the other day and saw that some were not good for precision motion and had backlash but my mind is a seive so I've forgotten everyyhing except that a 10:1 reduction ends up with a 445mm pulley!

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23 May 2020 08:03 #168656 by phillc54
I told a lie, I have been working on the table and my pulleys are actually 16 teeth so that is 48mm/rev, not optimal but it wil do for a while.

I also managed to straighten the Z axis leadscrew to within 0.02 mm in the centre, it is 200mm long and was around .75mm out originally so I am very happy with that. It is amazing what you can do with some time, some blocks of wood and a hammer...

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23 May 2020 09:03 #168668 by tommylight
www.ebay.com/itm/Timing-Belt-Pulley-GT2-...UylA5wX-Ef5Vb2nrBVaw
I bought from him several times, everything is perfectly good with him, delivery, price, quality, all as it should be.
And this is by far the cheapest reduction set on the net.
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23 May 2020 09:34 #168675 by rodw
So how did you manage to bend a ballscrew?

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23 May 2020 09:36 #168676 by phillc54
That was a case of you get what you pay for. From memory the complete Z axis was around AUD$70
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23 May 2020 13:08 #168686 by dvn4life1972
That's pretty cheap.

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23 May 2020 23:41 #168747 by phillc54

dvn4life1972 wrote: That's pretty cheap.

Yes, and cheap is the operative word...:)

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25 May 2020 22:48 #168912 by dvn4life1972
Well, just got back home from a visit to family. I went to cut a part out and the power went down for the shop for a moment. I can get the thing to start where it left off, right? I tried but I had to restart the software and need the torch to come on and probe, etc. Is there a decent procedure, or do I need to go into the gcode and add it at where I need it to run from?

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25 May 2020 23:29 #168917 by dvn4life1972
I tried inserting a M3 $0 S1 right before where it died and it worked and completed the cut. Phew I was nervous about that.
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25 May 2020 23:55 #168919 by rodw
For a short run, I just run it with the torch off until it catches up. Sometimes, I've edited the sheetcam job to remove already cut parts.
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