WZ9V build log

wz9v
Posts: 130
Joined: Wed Jan 29, 2014 10:08 pm

WZ9V build log

Post by wz9v » Fri Feb 14, 2014 7:09 pm

After a weather delay yesterday I received my kit (number 1473) today. Now I just need to clear off the table I'm going to use for assembly and get started. With any luck my spindle and it's power supply won't be too much longer and I still need my buildlog.net inspired stepper board. I do have some 76oz/in NEMA 17 steppers ready and waiting for their new home.

just got the 400W spindle, mount, controller today also. Don't have the 48V supply for it yet but I can probably test it with the 12V supply I use for my R/C chargers.
Shapeoko 2 - Mechanical kit 4731
Z-Axis Acme Screw Upgrade / Makita RT0701C / Re-enforced Y and X-Axis / External Belts on Y / Extrusion work top

wz9v
Posts: 130
Joined: Wed Jan 29, 2014 10:08 pm

Re: WZ9V build log

Post by wz9v » Sun Feb 16, 2014 4:14 am

Kit went together smoothly. Unfortunately the only electronics I have so far are the steppers so I'm stuck until them come in. Best I can tell I'm missing one of the 1.25 metal spacers.
Shapeoko 2 - Mechanical kit 4731
Z-Axis Acme Screw Upgrade / Makita RT0701C / Re-enforced Y and X-Axis / External Belts on Y / Extrusion work top

wz9v
Posts: 130
Joined: Wed Jan 29, 2014 10:08 pm

Re: WZ9V build log

Post by wz9v » Tue Feb 18, 2014 2:58 am

Got everything built up this weekend at least to the level of the parts I had already.
- Mechanical kit
- Steppers NEMA 17 76oz/in
- 400W eBay spindle

Have some 4 conductor shielded wire and aviation connectors on the way for the stepper wiring and still waiting on the 48V power supply to arrive for the spindle. Have an Arduino UNO handy, just need to get my stepper shield and drivers to round out the electronics. Still trying to decide 24V or 12V for the stepper supply.

Oh and yes. I have the very stiff Z-axis problem. I've tried the drill and it works the carriage up and down OK but the rod gets really warm. Trying to turn it by hand it is really stiff. Gotta get that sorted or I'm sure I'll overheat the Z-axis stepper.

Didn't think I could mount my spindle with the stock mount and then I noticed that people were mounting the DW660 with it and my spindle at 52mm diameter was smaller. Just have to check clearance at the top end but looks good so far.
Shapeoko 2 - Mechanical kit 4731
Z-Axis Acme Screw Upgrade / Makita RT0701C / Re-enforced Y and X-Axis / External Belts on Y / Extrusion work top

WillAdams
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Re: WZ9V build log

Post by WillAdams » Tue Feb 18, 2014 11:23 am

Getting a bit concerned about all these Z-nut issues.

Wish we'd gone w/ ejs's design: http://www.shapeoko.com/forum/viewtopic ... 720#p12964
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

cvoinescu
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Re: WZ9V build log

Post by cvoinescu » Tue Feb 18, 2014 11:43 am

I like Improbable Construct's design better (the Acme screw). :)
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

WillAdams
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Re: WZ9V build log

Post by WillAdams » Tue Feb 18, 2014 12:21 pm

So do I, but it's significantly more expensive, and requires that the Acme rod be machined to spec and that one provide a couple of extra washers --- the machining is the real killer, since we seem to already be having supply issues for parts.

I wonder if ejs's design couldn't be cut out of HDPE rather than Delrin since there're no bearing surfaces save for sliding against the MakerSlide.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

WillAdams
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Re: WZ9V build log

Post by WillAdams » Tue Feb 18, 2014 1:43 pm

Another possibility is we may have a batch of bad M8 all-thread rod --- anyone who has a too-tight nut should consider spinning by a hardware store and trying the nut on different samples to see if it works better.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

cvoinescu
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Re: WZ9V build log

Post by cvoinescu » Tue Feb 18, 2014 2:23 pm

That sounds unlikely, both because it's much more likely for a custom part to be slightly wrong than a commodity item, and because, in my experience, it is the nuts that are sometimes too tight. In one batch, I had to run a tap through as many as a quarter of them to make sure they worked nicely (I test every single one); other batches were better, with only a handful too tight.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

wz9v
Posts: 130
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Re: WZ9V build log

Post by wz9v » Tue Feb 18, 2014 6:11 pm

The metal nuts that capture the bearing ran up and down the rod with no problem. The Delrin block is what is tight, before installing it i ran it up and down the rod by hand a few times and it was tough but not really bad. Once I assembled it into the z-axis it got worse. My drill can easily force it up and down but it is a royal pain to move it by hand so I'm thinking the stepper will have trouble.

I'd do the ACME screw upgrade if it were in stock. Until then I'm in search of alternative solution. Somebody mentioned an M8 tap would help.
Shapeoko 2 - Mechanical kit 4731
Z-Axis Acme Screw Upgrade / Makita RT0701C / Re-enforced Y and X-Axis / External Belts on Y / Extrusion work top

danimal
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Re: WZ9V build log

Post by danimal » Wed Feb 19, 2014 4:09 am

I used this nut in my most recent modification.

http://www.cadcamcadcam.com/acme-nut.aspx

It is simple, relatively cheap, made of delrin and anti backlash. Maybe someone makes this in other thread patterns. Possibly incorporate this design into the standard nut? It seemed like a nice middle of the road solution to brass nuts or other anti backlash solutions. I think that i paid $7 off of ebay for mine. I bet in bulk they would be very reasonable.
Shapeoko # 1458

RT0701C Spindle || dual y motor || x axis nema23 with custom carriage 1000mm length || z axis nema23 linear rail upgrade with 1/2-10 ACME

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