New start

[Nr1madman]

Got some more work done

[Zeeflyboy]

nice to see it's moving smoothly! did you sort out your screw binding issue?

[Nr1madman]

nice to see it's moving smoothly! did you sort out your screw binding issue?

Thanks ;)

Yeah the screw is working fine now. I found out that one of the screwholes in the ballnut bracket is a little off. Since I have to remake the Z dropplate anyway the easy fix was oversizing the mating hole for the crooked screw. 7mm instead of 6 was a winner ;)
Now I have to secure the dropplate or it will slide to far down!
Still waiting for the htd belts to arrive and I'm hoping the motor will hold it even powered down. How do you guys solve this issue? A block under z when the machine is powered off?

Skickat från min SM-N910C via Tapatalk

[Zeeflyboy]

All my machines have always held in position switched off.

If your Z is particularly heavy or you are using a longer pitch ballscrew I guess you need to think about either a counter balance of some sort (which will help your stepper out if the Z is particularly heavy) or some sort of lockout system to hold it up I guess.

[Nr1madman]

All my machines have always held in position switched off.

If your Z is particularly heavy or you are using a longer pitch ballscrew I guess you need to think about either a counter balance of some sort (which will help your stepper out if the Z is particularly heavy) or some sort of lockout system to hold it up I guess.

Good to hear ;)
I have 1610 screw for my Z. Ordered 1605 but got wrong pitch delivered. Full refund from Mr China man so I have compensated with pulley ratio to the motor.
I think my Z plate is several kgs in weight. 15mm thick steel around 160x 300mm big..
Will remake it in aluminium at a later date ;)
Really hope it will hold without dropping, have to see when the spindle bracket arrives!

Skickat från min SM-N910C via Tapatalk

[Nr1madman]

Okey.. electronics question coming up!
Planning on making a "standard" 68-70v diy psu.
Have a bridge rectifier already and waiting on 2x24v 500va toroidal transformer.
Found a bag of capacitators in my shed.
100v 1000uF each. Have around 20 of these.. have seen most of you use 3 or 4 of 4700uF..?
Okey to use these that I have?

If it sounds good.. how would I connect them? It's the round type with long thin legs for soldering to a pcb.. but there will be to much current for using breadboard or something like that..?
Thinking about stripping 1.5mm wire and twisting the capacitator legs around it and soldering in place. Then shrink-wrap for personal protection?

It will be a long row and lots of solder points... but I don't have to buy more parts for it ;)

Skickat från min SM-N910C via Tapatalk

[Clive S]

Sounds like a plan. You would need 3 rows of 5 all in parallel and tie them together with a big zip-tie

[Nr1madman]

Small update.. as usual Im doing a little work everywhere :D
Made some adapter plates for bf/bk bearings.
Started soldering my capacitorbank aswell.. but no pics of that til it's finished!

When you work on the machine for 30-60mins per day it feels like nothing is progressing.. Wish I could get a whole day to spend on this ;)

Some pics for those who want to see..






Skickat från min SM-N910C via Tapatalk

[Nickhofen]

Nice to see that you have make progress!
The extrusion you use has 10mm slots? From where did you buy the T nuts?

[Nr1madman]

Nice to see that you have make progress!
The extrusion you use has 10mm slots? From here did you buy the T nuts?

Nope!
I have 8mm slots with 40mm between the slots. That's why I had to make the adapter plates for the gantry. With 45mm extrusion the bearings could be bolted straight on.
Found this out to late in my planning.
Already had the side plates made.. ;)

One thing to do different with mk2 :D

I bought a bag of t-nuts from ali express.
They cost crazy money if bought locally in Sweden ;)

Skickat från min SM-N910C via Tapatalk