Dead Treadmill Motor Controller - Page 1
Forum section: electronics / general

author: ludzinc
author_rank: Unknown
timestamp: April 30, 2014, 04:27:23 am
content: HiCan anyone suggest an on-line source for treadmill motor controllers? The one in my wife's 'mill has gone to God, and I can't find a replacement.The markings on the board are: "KING-I 900176/75(2)"I've found a similar board on what I believe to be the manufacturer's site, but I've had no response from them regards purchasing directly.http://king-3.king-i.com.tw/www/product_view.asp?P_ID=128&Page_No=1&NewProduct=And no, I don't think mine is repairable - all the high power parts are fine (Chopper FETs, Bridge rectifier etc) and the logic on the board seems to work,util they disappear into an epoxy coated module, and no drive signals exit the module to the gates of the FETs ...Thanks all.

author: johansen
author_rank: Super Contributor
timestamp: April 30, 2014, 04:39:03 am
content: the cheap ones are all the same.potentiometer, 2 scr's and 3 diodes.its hard to find them for less than 30$, but it can be done.http://www.ebay.com/itm/Treadmill-Motor-Speed-Controller-MAG-MC-30-Replacement-Extra-Free-Shipping-/261466283696

author: ludzinc
author_rank: Unknown
timestamp: April 30, 2014, 05:29:34 am
content: Not a 'cheap one'Speed control isn't via a potentiometer - the supper console sends fast / slow (and up / down for the incline) commands to the controller...

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: May 01, 2014, 07:27:52 am
content: Hi Ludzinc,Coincidentally, I have just tossed a King-I Corporation controller in my workshop bin. I had just unsoldered the FET and thought that the transformer looked useful when I dropped the PCB on the floor whilst desoldering it and the board broke on one corner so it went in the bin. The board number is BC 1072 (4). One bridge, one FET, one diode and a daughter PCB potted in pink epoxy.

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: May 01, 2014, 07:39:39 am
content: Apologies, I have just looked at your link and mine isn't the same PCB.

author: ludzinc
author_rank: Unknown
timestamp: May 03, 2014, 02:22:19 am
content: Quote from: BurningTantalum on May 01, 2014, 07:27:52 amHiHope I haven't missed your bin clearance! I've got the treadmill working, by defeating the shutdown circuit, that lives inside the pick expoxy blob.Any chance I can get that off you? eBay ad?

author: mjkuwp
author_rank: Unknown
timestamp: May 05, 2014, 05:16:01 pm
content: who manufactured the treadmill? why not go to them? I suppose the price is too high.

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: May 08, 2014, 10:41:57 am
content: Ludzinc,Sorry for the delay!Where are you located? I'm in Western Australia. If you just want the pink potted board I could mail it. I have no way of knowing if it is the same though.I think it has 13 pins- 2, space, 11; but it is in the bin in the workshop so will look tomorrow and confirm. It seems to be epoxied to the mother board for vibration protection.I have no recollection of the model of treadmill that it came from but it was single 180VDC drive, no jack. I collected a couple controllers from the local tip after finding a brand new York Inspiration on the metal heap. It had an assembly fault on the controller (IC leg bent under in the socket) but before I looked at it I salvaged some big FETS etc. in case I needed them.I have no idea how it came to be discarded when it cannot have worked from new- it gave a drive error code on the display.Regards, BT