Member postings for Alan McDade

Stuart, - many thanks - I have fixed on my diagram.

Robert - thanks for your help.

Thank you John and Martin for your really helpful advice.

The DM860H driver I have does not show the "+" or "-" after the AC in the High Voltage silk screen printing like in the photo above. I do note that it does say "VAC: 18V~30V VDC:24--110V" in the same place as in the photo above. So I take it then, I am OK to connect a DC 24V supply from the PSU to the DM860H driver and remove the step down transformer as shown below:

Again, many thanks for your really helpful advice which has given me confidence in what I am doing with this little project.

Thank you Martin and John which prompted me to look again at my wiring diagram and noted a mistake, so I consulted the Driver manual and noted the AC input is 20 ~ 70 v AC and not DC as I had thought - phew!

Update diagram is below. I added a step down transformer (240vac to 24vac) for the driver power. I also checked the ground and have it correct - as shown in the circuit diagram from the manual.

Great comments guys - anymore advice is welcome.

Making progress - I now have all below parts in my house and I am about to try and wire this all up.

So HELP - I am a numpty regarding electrics and attempts in the past led to a burning smell or a loud bang.

I want to avoid that this time so would some of you kind experts look at my proposed wiring diagram and tell if it is SAFE and won't burn or go bang please.

Thanks is advance.

Edited By Alan McDade on 20/12/2022 16:00:25

thanks Michael, sadly they won't post to me in Northern Ireland because of the NI Protocol, I assume!!

Cheers Dave,

You have been most helpful - the power of this forum is really epitomised by your willingness to help this old pensioner!

Dave, most helpful and I like the 'box'.

I take your point about the S-350-60. I should have read more about it before ordering. It's going back to the seller now.

Now looking for a psu that will run the 'box' you linked to as I like that concept. Is 30v that max? So I should look for a 24v psu? or what would you suggest?

I do really appreciate your help on this.

Thanks Joseph - you are correct on not knowing how SMs work. I am a complete novice on electrical things, but I am having a go! I will check out your links. Many thanks.

Help Please.

I am not an electrical guy in any shape or form but want to add a stepper motor to the Z Axis of my Warco WM18 Mill, and I need some help in sorting out the wiring. All I want a simple “On-Off-On” switch to select the up or down motion of the “Z” Axis. I plan to mount the switch on the mill’s control box in a small enclosure. I will use a NEMA 34 stepper motor with 12Nm torque driven by a S-350-60 PSU both of which I have already purchased.

The PSU has the Live, Neutral & Earth input connectors as well as the following connectors available: 3 off V+ and 3 off V- 

The NEMA 34 has the following four wires available:

Black = A+    Green = A-     Red = A+      Blue = A-

I also need to include a microswitch to limit the travel of the Z Axis when it reaches the top of the Z Axis.

So, how do I wire this all up without burning anything out?

Edited By Alan McDade on 21/11/2022 15:04:51

Edited By Alan McDade on 21/11/2022 15:05:18

Dimensions of the thread as follows:

Martin, many thanks. Followed up an eBay and have got one. Appreciate the tip off. Just hope that it works now!!

Thanks Oily Rag - There are no markings on the Dividing Head so I don't know the maker. I will get the micrometer on iot and post here.

Bazyle - I do intend to sell the backplate that came with the dividing head.

I bought a second hand dividing head which is in great nick and has a Boxford 1.5" x 8 TPI thread on the spindle.

It came with a chuck backplate (but no chuck) however when I offer the backplate to the spindle it only goes on about half way and locks up. So I bought a new Boxford rotary table mount (needed one anyway) and tried the backplate on it - same result - it locks up.

I read on another forum that the issue is related to 55 degree verses 60 degree thread angle! The other forum also mentioned that a 1.5" x 8 TPI BSF tap, run through the backplate hole, will fix the problem. The cost of a 1-off 1.5" x 8 TPI BSF tap is £91+p&p = £116 which, as a pensioner, is way outside my budget.

So would any kind sole be prepared to lend me the BSF tap for a few days? I will cover expenses and return to the owner afterwards. I live in Co Antrim. My word is my bond.