Search found 3 matches

by TomJennings
Mon 13 Sep , 2021 20:59 pm
Forum: Novamill
Topic: Spindle Motor Access
Replies: 1
Views: 5671

Spindle Motor Access

Please Can you help me? I would like to check the spindle motor brushes, and also adjust the belt. Two of the four screws that are holding the motor are obstructed by the belt, so how do you adjust the belt when you can't get at the screws? I would also like to get the motor out, to check the bearin...
by TomJennings
Mon 13 Sep , 2021 13:32 pm
Forum: Novamill
Topic: Novamill questions
Replies: 9
Views: 9247

Re: Novamill questions

Hi, Mihail , I have some answers, but it would take several A4 pages to tell you how. 1) The spindle doesn't reverse, but it will! you need a spindle reversing Relay (not cheap!). 2) The control circuit voltage is 24v 3)Power Switch. I cant help with. 4)I have installed an encoder, and index on mine...
by TomJennings
Mon 13 Sep , 2021 12:28 pm
Forum: Novamill
Topic: Novamill - maximum spindle speed?
Replies: 11
Views: 15245

Re: Novamill - maximum spindle speed?

Hi, I replaced the original Sprint Electric 400 card with a new Sprint Electric 340i unit. it has a speed x2 switch. My spindle can now run quite happily at 12000 rpm for 1/2 an Hour without getting even hot. I cut P C Boards with a 0.2mm engraving cutter at this speed for 1/2 an hour or more quite ...