DC Treadmill Motor

[Mervyn KarwotParticipant @mervynkarwot46957]

Thanks again for all the information and links. I have decided to get a 60volt DC supply and I have purchased a 0 to 60 volt adjustable supply direct from China through Banggood. Before anyone says anything, I have bought many workshop items direct from China through Aliexpress and Banggood and all have been high quality items. This one cost £37 with free postage but there could be a customs surcharge. I will get it in a few weeks and I will let you know the results

Mervyn

[Ian PParticipant @ianp]

Whilst I was in the 'direct drive will never work' fraternity, I now think (based on what you have said) that your plan will work.

I would be interested to know more about the controller you are going to use, please can you say what make and model is it?

Ian P

[Mervyn KarwotParticipant @mervynkarwot46957]

The controller I have has no name on it and the label says "DC9-60v Motor Controller20A" It is a pulse width controller with off, forward and reverse switch. I bought it a few months ago from an eBay seller in Hong Kong. It was working fine when I connected the motor to the test battery. It cost around £10.

The DC power supply I have just bought from Banggood is "AC 110/220v to DC 0-60V 8A 480W Adjustable Regulated Switch Power Supply"

My motor works with 1 to 4 ratio polybelt pulleys from the motor to the z axis handwheel. I have seen this setup on the internet before.

I hope this helps Ian.

Mervyn

[Swarf, Mostly!Participant @swarfmostly]

Posted by Andrew Johnston on 17/05/2019 16:20:56:

In addition 48V is a standard industrial distribution voltage within automation cabinets and the like, as well as for power over Ethernet units. The problem with 60V is that it is at the SELV voltage, so regulations get rather more onerous.

Andrew

Added for historical interest: I believe that 48 Volts was also the voltage of the battery supply used by the old Strowger telephone exchange equipment. Lead-acid cells in glass tanks large enough to fall into!!!

Best regards,

Swarf, Mostly!

[MeunierParticipant @meunier]

Posted by Swarf, Mostly! on 20/05/2019 10:56:55:

snip/ 48 Volts was also the voltage of the battery supply used by the old Strowger telephone exchange equipment. Lead-acid cells in glass tanks large enough to fall into!!! /snip

Best regards,

Swarf, Mostly!

…and the 48V battery racks from a BT PABX made terrific end frames with their connecting bars for my work benches, superb pink pitch pine, black painted. " do you have to check those back in at base ?' – No squire, skip job, if you can make them disappear then help yourself" And the cells from 48V would have been an improvement on the 160off cells on the 240V cell-bank on a no-break power supply when it came to monthly maintenance, not to mention the 108 cells for the 80+/-80V
DaveD

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